# A cookie-mold maker and book blogger built a reading app that pushed Goodreads down the Spanish charts · Mobile app

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> The author is a Spanish-language BookTok creator, and gathered a batch of people through a public beta before launch. In the first week, a creator with 74k followers posted 'it beats Goodreads', which got 370k views. Every monthly big update has been teased on TikTok first, keeping the heat going.

[Mobile apps](https://stringers.io/en/apps/index.md) · iOS + Android · written 11-6

Mistbook · Laia Vidal

# A cookie-mold maker and book blogger built a reading app that pushed Goodreads down the Spanish charts

**What it is** A reading-tracking app native to Spanish: log what you've read, decorate your bookshelf, earn stickers for reading streaks. Free to use; membership is billed yearly or as a one-time purchase.

**Why it took off** The creator is a Spanish BookTok blogger herself, and before launch she ran a public beta that built up a crowd. A week after launch, a blogger with 74k followers posted "it pushed Goodreads down," which got 370k views. Each major monthly update has been teased on TikTok first, and the buzz has kept going.

**B** **How you could follow it** Don't build a reading app for the English market. If you're already part of a non-English book community (Portuguese, Italian, French, etc.), copy its playbook in your language: one-click import from Goodreads, a shelf worth sharing, a monthly recap graphic, and a public TestFlight beta before launch to gather seed users.

Grade B: there's a real gap in non-English book communities with no native, polished product, and few people know about it yet. But it took off because the creator's standing in the community, which followers mostly can't replicate, and the category itself is crowded. The revenue ceiling is probably a few thousand to $10–20K a month, and Mistbook already supports 6 languages, so it may reach your target market first. What insiders are saying

Data (updated daily) · First launch 2026-08-30 · Spain rating 286 · 11-08 charted in 36 stores · First launch 2026-08-25 · 11-07 installs 82,726

iOS · best category chart rank · by store

Spain Italy Brazil

Data 2026-10-28 → 2026-11-08 (12 days, 12 observations). Lower rank is higher; gaps mean it wasn't charted that day

iOS · rating count · Spain

Data 2026-10-28 → 2026-11-08 (12 days, 12 observations). Apple doesn't publish download counts; rating growth is a proxy for downloads.

Android · Total installs worldwide

Data 2026-10-29 → 2026-11-07 (10 days, 10 observations). Google's detail page only refreshes install counts every other day, so a flat day doesn't mean nobody installed.

Android · Ratings count (cumulative)

Data 2026-10-29 → 2026-11-07 (10 days, 10 observations)

Laia Vidal, a Spaniard, used to film book content on TikTok and make "book-themed cookies" with a 3D printer. This summer she built her own reading-tracking app, Mistbook. In Nov 6 it ranked #3 in the Spanish App Store's free Books chart, with Goodreads at #4. It has no paid ads and its features aren't unique, yet it took off because of three things: Spanish-speaking readers lacked a good reading app, the creator is part of the book community, and she posts a TikTok about every update. Below: how it grew, how much money it makes, and whether you can follow it.

### A video saying "it pushed Goodreads down"

On Sep 6 2026, a Spanish-language book influencer with 74k followers, @zoepdefelix, posted a TikTok with one line: "@mistbook ha desbancado a Goodreads" (Mistbook has dethroned Goodreads), followed by "I love every detail it comes with." The video later reached 370k views and 38.5k likes. At that point Mistbook had only been on iOS for a week (Aug 30; Android came out a few days earlier, Aug 25).

Over the next month, a batch of similar videos appeared on Spanish BookTok: "how to move your books from Goodreads to Mistbook" (@albabookish, 12k views), "if you're still on Goodreads... delete it" (@booksireneee, 9-25), and a pile of small bloggers showing off their virtual shelves. We saw no sponsored-content markers and treat these as organic (unverified). In Oct 11 the developer said on TikTok that Spain had "over 125k readers" and that the app had hit "TOP1" last month. That's her own claim; we can't verify it. A third-party site, AppBrain, recorded its best Spanish Books free-chart rank as #3.

### Who is behind it

Laia Vidal's personal account, @Xocomimi, has only about 1,500 followers. Before launch she posted monthly wrap-ups of books she'd finished, her reading slumps, and cookie molds printed on her 3D printer with jokes from books she liked. In Jul 19 she posted "my secret project of the past few months can finally be talked about," said the app was "made specifically for female readers on BookTok," and opened TestFlight beta sign-ups that day. The next day she posted a video showing how she puts the 2026 years of books she's read on a virtual shelf and decorates it.

The official @mistbookapp account's first video in Jul 26 opened with: "I'm going to say something controversial: reading apps haven't evolved in years." It got 39k views. Over the following weeks she posted beta progress like a serial: a shelf-decoration demo 46k, "the beta is changing this app" 66k. By launch day, a crowd was already waiting to download.

In an October video she joked: "In September I read one book, and wrote about 37,000 lines of code." Being both the developer and a blogger in the user community matters a lot here, as you'll see.

### What it actually does better than Goodreads

On the feature list, it's close to StoryGraph and Bookmory: add books by scanning ISBN, mark as reading / want to read / finished / abandoned, reading timer, stats, reading order for series, and one-click import from Goodreads, Bookmory, StoryGraph, and Babelio. That last one takes away most of the cost of switching apps.

What's really different is three things:

- **It looks good, and you want to show it off.** Books can be arranged by cover or spine, decorated, and shown as a home-screen widget. The monthly Wrap Up graphic and the first-half book tournament are each ready-made BookTok videos.

- **It plays like a game.** Consecutive reading days earn coins, coins buy stickers, and stickers have rarity tiers. There are also reading bingo, achievements, and seasonal challenges. In late October it added "La Plaza," a town you can explore with a bookstore, café, and book club, and the preview hints at a sticker trading market.

- **Native to Spanish.** Goodreads has never done Spanish well, and StoryGraph has only 55 ratings on the Spanish App Store (11-06). Spanish readers didn't have a reading app made for them.

For what users say, see the Spanish App Store reviews (Nov 1–2): "I've tried every reading app, none comes close to this one"; "with every update the creator gets better"; "I hope it lasts forever, it's so cozy"; "I keep praising the creator." Several reviews praise the creadora (the female creator) herself, not just the app. Users are backing an independent creator in their community.

### How it has stayed hot

After launch she has shipped a major update every month and teased each one on TikTok first: Sep 13 teaser for "the big October update" 62k views, Oct 1 Halloween update 22k, Oct 10 desktop shelf widget 18k, Oct 25 La Plaza 28k. Fans follow the updates like a TV series.

The numbers show it: Oct 31 and Nov 2 shipped 1.3.0 / 1.3.1 (the La Plaza version). On Nov 3, iOS got 19 new ratings worldwide in a single day, versus only 0–2 a day the week before. As of 11-06, iOS has 358 ratings averaging 4.9 stars, 279 of them from Spain.

Android is much bigger: Google Play has about 83k lifetime installs worldwide, about 7 new installs in 3,000 days, 600 ratings at 4.88 stars, and ranks #9 on Spain's Books free chart (11-06). iOS ratings and Android installs differ by more than 200x, so most users are probably on Android (inferred).

### Where the money comes from, and how much

The app is free to download, and the paid membership is called EPIC, which unlocks 20 extra features (themes, challenges, and more). The day before launch she announced on Instagram a yearly price of €29.99 and a lifetime one-time purchase of €59.99. A user mentioned a monthly option too, and the third-party site Appllama captured US pricing of $2.99/month and $24.99/year. She has said that buying membership is also "supporting the project." Readers generally hate subscriptions, so offering a lifetime one-time option is a smart move.

There's no first-party revenue data. Third-party estimates vary widely: ScreensDesign estimates about $15k a month, and Appllama estimates $5,000 last month, both model-based. Ranking #7 on Spain's Books top-grossing chart (11-06) shows people are paying, and it also appears on top-grossing charts in small Latin American markets like Peru and Panama, though a few sales can get you there, so that doesn't prove much. Conservatively, this is a solo product earning a few thousand to over $10K a month (estimated).

### Who it's competing with

| Product | The Spanish picture (App Store, 11-06) | Compared with Mistbook |
|---|---|---|
| Goodreads (Amazon) | 22k ratings, #4 on the Books free chart | Biggest in scale, but the interface is old, it hasn't changed in years, and the Spanish experience is mediocre |
| Bookmory (Korean team) | 1,737 ratings, #34 on the free chart | The most feature overlap, but no shelf decoration, stickers, or social town |
| Fable | 1,189 ratings, #20 on the free chart | Built around book clubs, mostly English |
| Bookly | 693 rating | Timer plus subscription, no gamification |
| The StoryGraph | 55 rating | Data-focused and English-first, with almost no Spanish users |
| Margins, Shelfy, and other aesthetic shelf apps | Haven't broken into the Spanish market | The same trend in the English market |

The English market for this is already crowded: between 2026 and October 7, more than 60 App Store launches named "Book Tracker" or something similar hit the store, and most have only single-digit to a few dozen ratings. Mistbook is one of the few that broke out, and it did so through Spanish-language book communities, not because the product is unique.

We haven't seen anyone directly copy it yet. A Spanish reading site, TheBookSailor, wrote an article in October called "alternatives to Mistbook," riding its name for search traffic. Almost nobody in the English community knows about it: there's little discussion on X or Reddit, and the creator hasn't posted any revenue. In Oct 11 she opened an English account, @mistbook.us, and announced a push into the US. That video got 6,371 views, and the account has 25 followers. The US market shows no real traction yet.

### If it were you

**The bottom line:** You could follow it, but don't follow "reading apps." Follow the playbook: find a language market whose book community lacks a good native product, be part of that community yourself, and build something that produces shareable video. Be realistic about the ceiling. If it works, it's most likely a solo product earning a few thousand to $10–20K a month (estimated), not a big business.

**Who it's for:** 1–2 people, one of whom already posts in a non-English BookTok / Bookstagram scene (even with a small following, Laia's personal account has only 1,500), has a strong eye for design, and can ship on both iOS and Android. Languages worth looking at: Portuguese (Brazil has a huge book community), Italian, French, German, Turkish, Polish. Before you start, check which 6 languages Mistbook supports itself and how it ranks in those stores. It will probably go to your storefront next.

**Who it's not for:** People aiming at the English market (60 new bookshelf apps are already fighting for it, including Goodreads, StoryGraph, and Fable); people outside the book scene who can only write code (the first users and first creators in this category come from the author's own identity, and that can't be bought); people who want to win on features (features are easy to copy, and Mistbook's are close to Bookmory's).

**How to build it:** Get four things right in the first version: one-tap import from Goodreads (bring the switching cost to zero); a bookshelf that's fun to decorate and screenshot; a monthly summary card; and a bit of gacha-style collecting (streaks unlock stickers). For monetization, follow its lead: a free tier with a membership, an annual plan, and a lifetime one-time purchase, with the lifetime option placed prominently.

**How to get users:** For 4–6 weeks before launch, build in public through TestFlight, post a progress video every week, and make the first one take a clear stance (Mistbook's was "reading apps haven't evolved in years"). At launch, bring the most active creators from the beta and get them to post "I moved over from Goodreads." After launch, ship one big update a month, announce it on the official account first, and treat the update itself as content.

**Timing:** Year-end is the peak for the reading community: year-in-review posts and new-year reading challenges run from December into January. If you want to catch that, open the beta and post your first video before December. If you can't, make an "annual reading challenge" your January launch theme.

**What it means if you misread it:** ① Mistbook localized first in the store you picked and charted in that store's Books category before 20 — the gap is already taken; ② its Spanish ranking dropped out of the Books Top Free chart before 10 — the peak in 12–January was a spike, and retention can't hold it; ③ Goodreads shipped a proper Spanish localization or added bookshelf decorations, and a big player filled the gap; ④ you posted 4 weeks of build-in-public videos and none passed 10k views — you don't have a foothold in that community yet, so build the audience before the app.

### Data and sources

- App Store: Spain and other storefront charts, ratings, reviews (2026-10-28 to 11-06); iTunes lookup id 6787462448.

- Google Play: install count, rating, and chart for mist.warm.bundle (2026-10-29 to 11-06); ASO Lab.

- TikTok: works from @mistbookapp, @Xocomimi, and @mistbook.us, plus "mistbook"-related videos (@zoepdefelix 9-06, @albabookish 9-14, @booksireneee 9-25, and others), view counts as of 11-06.

- Pricing: Mistbook's Instagram posts before launch (€29.99/year, €59.99 lifetime); Appllama (US store pricing).

- Revenue estimates: ScreensDesign, Appllama, AppInsider. All third-party model estimates.

- Press: Artículo14 2026-09-03 "Qué hay detrás de Mistbook"; The Agustin Agency podcast 2026-10-29.

- "125k readers" and "TOP1" are the developer's own claims, not verified.

[iOS store page ↗](https://apps.apple.com/app/id6787462448)[Android store page ↗](https://play.google.com/store/apps/details?id=mist.warm.bundle)

**Research notes: competitor table, acquisition evidence, full research report**

Competitors

| Name | Where | Launched | Scale | How it differs from this one |
|---|---|---|---|---|
| Goodreads | iOS | 2007 (web) / 2010 (app) | US store 760k ratings; Spain 22k ratings; #4 on Spain's Books free chart | Dated interface, little change in years, mediocre Spanish experience; Mistbook leads with looks and gamification, and can import Goodreads data in one tap |
| The StoryGraph | iOS | 2019 (web) / 2021 (app) | US store 3,605 ratings; Spain 55 | Strong on data and recommendations, but English-leaning and cold in tone; barely present in Spanish-speaking markets |
| Bookmory | iOS | 2020 | US store 16k ratings; Spain 1,737 | Most feature overlap (timers, stats); Mistbook adds bookshelf decoration, stickers, and a social island, and is native in Spanish |
| Fable | iOS | 2020 | US store 83k ratings; Spain 1,189 | Built around book club social features, English-leaning |
| Bookly | iOS | 2016 | US store 63k ratings; Spain 693 | Timer and stats behind a subscription, average design, no gamification |
| Margins / Shelfy and other new bookshelf apps | iOS | 2024–2025 | Margins US store 20k ratings | Good-looking bookshelf apps for the English market that never broke into Spanish-speaking regions |
| TheBookSailor | Web | Unknown | Unknown | A reading and social website that Mistbook gets compared against for SEO |

Where users come from

- **Verified** **The author's own BookTok account and TestFlight build in public** : @Xocomimi 7-19 announced the project, 7-20 shared TestFlight screenshots; @mistbookapp 7-26 to 8-16 posted beta videos with 3.8–66k views (TikHub)

- **Verified** **Organic recommendations from TikTok creators** : @zoepdefelix (74k followers) 9-06 "@mistbook ha desbancado a Goodreads" with 370k views; @mayarita_ 9-13 with 95k views; plus a batch of tutorial and bookshelf videos (TikHub)

- **Verified** **the official account's monthly big-update previews** : the 9-13 October big update got 62k views, 10-25 La Plaza got 28k; after 11-02 posted 1.3.1, Spain's 11-03 rating count rose by 14 in a single day (appstore library).

- **Verified** **Instagram / YouTube BookTube tutorials** : Instagram has several tutorials and recommendation posts; YouTube "[BOOKTUBE] Mistbook" with 1.5K views

- **Verified** **Media and podcasts** : Artículo14 2026-09-03 covered it as a "viral new app"; The Agustin Agency 10-29 interview (147 plays)

- Inferred **Paid ads** : no evidence of paid campaigns found (the ad library only tracks products on its list)

## Why Mistbook (iOS id 6787462448) showed up

### Verdict

Mistbook is a reading tracker built by a Spanish indie developer (Laia Vidal, TikTok account @Xocomimi, who is herself a Spanish-language BookTok creator). It went into public TestFlight beta in July, launched on Android in Aug 25 and on iOS in Aug 30, and within a week big Spanish BookTok accounts were posting about it on their own, pushing it to the top of Spain's Books category. Users come from Spanish BookTok and Bookstagram, and they stay because it's far better looking than Goodreads and has more to do: a bookshelf you can decorate, sticker gacha, reading streaks, Wrap Up, an annual book tournament, a reading theory board, and reading orders by series. Goodreads has never had a good Spanish localization, and Mistbook filled that gap. The developer ships a big update roughly every two weeks and previews each one on TikTok, and users follow those previews like new content, which keeps the loop going. No paid ads found.

Its edge is making reading tracking something that looks good, feels collectible, and is fun to show off, while being native in Spanish and built by someone already inside the BookTok scene. That's why it broke out. On feature lists alone it's not far from StoryGraph or Bookmory; the real differences are design, gamification, and the author's standing in the community.

### Data

- iOS: 2026-11-06 #3 on Spain's Books free chart, ahead of Goodreads (#4), behind only Kindle and Audible; #7 on Spain's Books top grossing chart (appstore library chart_rank, 2026-11-06). Global rating count went from 10-28 to 310 and then 11-06 over 358,7 days, with 42 new ratings, 36 of them from its Spain storefront. Single-day gains of 11-03 19 new ratings, matching the 10-31 and 11-02 major releases (1.3.0 / 1.3.1, which added the "Isla / La Plaza" social islands) (appstore library app_day). Rating 4.90 (iTunes lookup, 279 ratings in the es store).

- Android: package name mist.warm.bundle, developer name "Laia Xocomimi", first listed on the store 2026-08-25. Cumulative global installs grew by about 3,028 over 82,726,7 days; rating 600 from 4.88 reviews; #9 on Spain's Books & Reference free chart; in-app purchase range $2.89–$59.99 (googleplay library, 2026-11-06). ASO Lab recorded it at #5 on Spain's Books & Reference free chart 10-06.

- Android installs run about 200 times the iOS rating count. Most of its users are probably on Android, or iOS users rarely leave ratings. On TikTok the developer 10-11 said "more than 125,000 readers in Spain, and last month they got us into the TOP1" (@mistbook.us, self-reported, not verified).

- Pricing: free tier plus EPIC membership. The day before launch, Instagram posts announced an annual plan at €29.99 and a lifetime one-time purchase at €59.99, and some users mention a monthly option too; third-party Appllama captured $2.99/month and $24.99/year. Third-party estimates: ScreensDesign puts monthly revenue around $15K and monthly installs around 40k; Appllama estimates about $5K last month; AppInsider estimates 500+ downloads a day. All three are model estimates, unverified.

- It has charted on the Books top grossing chart in several small Latin American countries (Peru, Panama, El Salvador, Nicaragua, and others), at ranks 5–36. Those storefronts have low bars for charting, so a few sales are enough.

### Competitors

| Product | Where | Launched | Scale (appstore library 2026-11-06) | How it differs from Mistbook |
|---|---|---|---|---|
| Goodreads (Amazon) | iOS/Android/web | 2007 web / 2010 App | US store 760k ratings; Spain 22k ratings, #4 on the Books free chart | Largest in scale, with social and data features, but a dated interface, little change in years, and mediocre Spanish; Mistbook leads with looks and gamification, and imports from Goodreads in one tap |
| The StoryGraph | iOS/Android/web | 2019 web / 2021 App | US store 3,605 ratings; only 55 in Spain | Strong on data and recommendations, but English-leaning and cold in tone; barely present in Spanish-speaking markets |
| Bookmory | iOS/Android | 2020 | US store 16k; Spain 1,737, #34 on the free chart | A Korean team with timers and stats, the most feature overlap with Mistbook; Mistbook adds bookshelf decoration, stickers, and a social island, and is native in Spanish |
| Fable | iOS/Android | 2020 | US store 83k; Spain 1,189, #20 on the free chart | Built around book club social features, English-leaning |
| Bookly | iOS/Android | 2016 | US store 63k; Spain 693 | Timers and stats on a subscription, average design |
| Margins / Shelfy / SlowRead and other new bookshelf apps from the past 2024–26 years | iOS | 2024–2026 | Margins US store 20k; Shelfy 1,394 | All good-looking bookshelf apps for the English market; they never broke into Spanish-speaking regions |
| 2026 new "Book Tracker" apps launched from 7 to October 60 | iOS | 2026-07~10 | Mostly single-digit to dozens of ratings | Heavy sameness and a crowded category; Mistbook is one of the few that broke out, and it did so through Spanish-language distribution, not because its product is unique |
| TheBookSailor | Web | — | Unknown | Published an SEO page titled "Alternativa a Mistbook" (10-17), using Mistbook as a comparison to ride its traffic |

### Growth tactics (evidence)

1. **The author is a BookTok creator building in public** : @Xocomimi (about 1,500 followers, bio reads "📱Mistbook App") posted "my secret project" 7-19 and shared TestFlight screenshots 7-20. The official account @mistbookapp (8,006 followers, 67k likes) posted "a controversial take: reading apps haven't evolved in years" 7-26 (39k views), an update on beta progress 7-31 (38k), a demo of bookshelf decoration 8-12 (46k), and "the beta is changing this app" 8-16 (66k). People were already queued up to download before launch. (TikHub)

2. **Viral spread within a week of launch (the most important moment)** : @zoepdefelix (74k followers)9-06 posted "@mistbook ha desbancado a Goodreads" (Mistbook has knocked Goodreads off the top), 370k views, 38.5k likes; @mayarita_ (10k followers)9-13 posted a video, 95k views, thanking @Xocomimi in the caption; @jelizabooks 9-10 posted, 9,185 views. I found no sign of paid partnerships, so I'm treating these as organic (unverified). Small BookTokers kept posting tutorials and "my bookshelf" videos afterward (@ana.tg.93, @anfuca_, @analadeletras, @bookypaws, @yaiza9647, @sandybooks08, and others). Similar tutorials and unboxing posts also show up on Instagram and in YouTube booktube.

3. **Media** : Artículo14 ran "Qué hay detrás de Mistbook, la nueva aplicación viral para lectores de libros" on 2026-09-03; The Agustin Agency's podcast interviewed Laia Vidal (10-29 views on YouTube 147). All small outlets.

4. **Shipping updates as content** : the official account previews every major update with a video, e.g. the "October update" 9-13 62k views, the Halloween update 10-10 22k, the bookshelf feature 10-10 18k, "La Plaza" 10-25 28k, the book club 10-29 10k. The data shows the link between updates and ratings: after 11-02 on 1.3.1, Spain added 11-03 ratings that same day, 14.

5. **Sharing built into the product** : the Wrap Up image, annual tournament videos, bookshelf screenshots and stickers are already BookTok-ready assets, so users tag @Mistbook when they post.

6. **Going global** : 10-11 opened @mistbook.us (25 followers) for an English version; the app supports 6 languages. No sign of traction in the US store yet.

7. **Store search** : it may be ranking for Spanish terms like "registro de lecturas", but I found no evidence.

8. **Paid ads** : none found (our ad library only tracks products on our list, so not finding ads doesn't mean there weren't any).

### Why people stay and pay

- Reviews keep repeating a few lines: "I've tried every reading app, none comes close", "every update makes it better", "the creator is amazing", "so cozy". Users identify strongly with the author, similar to supporting an indie creator.

- Retention runs on gamification: consecutive reading days earn coins, coins buy sticker pulls, stickers have rarity tiers; there are also reading bingo, achievements and seasonal challenges.

- Reasons to pay: EPIC unlocks 23 extra features (themes, challenges and so on), and the author has said that buying a membership is also a way to "support the project". There's also a lifetime one-time purchase tier, which suits readers who dislike subscriptions.

### Visibility

It's spreading within niche circles. It's popular in Spanish BookTok (top videos 370k views), a Spanish small outlet has covered it, and third-party estimators have started tracking it (ScreensDesign estimates about $15K/month). But the founder hasn't shared revenue, it isn't on TrustMRR, and there's little discussion on English X or Reddit (x-radar: 120 posts in the last 0 days; the author posted on r/SideProject and r/Booktokreddit, but I couldn't retrieve the originals). The English market largely doesn't know about it yet.

### Copycats

No direct clone spotted. TheBookSailor has already published a "Mistbook alternative" page to ride its search traffic. In the same period, 60 more bookshelf apps launched in the English market (Shelfroom and Booktrace also have Spanish-language pages). They're all products of the same trend, not copies of it.

### What's worth borrowing

- **Find underserved language markets** : reading logs are a red ocean in English, but there's no native, polished product in Spanish. The same approach could work for Portuguese, Italian, French and other BookTok communities.

- **The author is a blogger in the target community and built in public via TestFlight before launch** , which gathered the first seed users and creators.

- **Build a product that generates content** : decorable bookshelves, Wrap Up, tournament videos, sticker gacha. Every user screenshot is a potential TikTok.

- **One "big update" a month, previewed on the official account like a serial** , with each update driving a wave of new users.

- **Annual subscription plus a lifetime purchase** , catering to readers' dislike of subscriptions.

### Unknowns

- Revenue: third-party estimates range from $5K to $15K a month, with no first-party data. Chart rank in small Latin American markets says little about money.

- The "125k readers" and "TOP1" figures are self-reported by the developer. Our database only started recording from 10-28, so there's no direct data on the September peak; AppBrain's recorded best rank was #3 on the Spain Books free chart.

- I can't tell whether the 9-06 video with 370k views was a paid partnership.

- No sign yet that the US store or the English version will take off.

- Developer background: a Facebook post says Laia Vidal was born in 1980 and has written books; I haven't verified whether she's the same person as the developer.

### Sources

- appstore database (app_day, chart_rank, app_profile, 2026-10-28~11-06); googleplay database (app, app_day, app_profile, 2026-10-29~11-06)

- iTunes lookup id6787462448(es);[mistbook.app/](https://mistbook.app/)

- TikHub: @mistbookapp, @xocomimi, @mistbook.us profiles and posts; keyword search for "mistbook" (@zoepdefelix 74k followers, 9-06 370k views, etc.)

- Pre-launch Instagram post [www.instagram.com/reel/Dcofp6rN5gz/](https://www.instagram.com/reel/Dcofp6rN5gz/) (price €29.99/year, €59.99 lifetime)

- Artículo14 2026-09-03 [www.articulo14.es/cultura/que-hay-detras-de-mistbook-la-nuev…](https://www.articulo14.es/cultura/que-hay-detras-de-mistbook-la-nueva-aplicacion-viral-para-lectores-de-libros-20260903.html)

- The Agustin Agency interview [www.youtube.com/watch?v=pQ68ihyQxRc](https://www.youtube.com/watch?v=pQ68ihyQxRc) (2026-10-29)

- ScreensDesign [screensdesign.com/showcase/mistbook](https://screensdesign.com/showcase/mistbook) ;Appllama [appllama.io/apps/6787462448/mistbook](https://appllama.io/apps/6787462448/mistbook) ;AppInsider [appinsider.io/apps/mistbook-6787462448](https://appinsider.io/apps/mistbook-6787462448) ;AppBrain [www.appbrain.com/appstore/mistbook/ios-6787462448](https://www.appbrain.com/appstore/mistbook/ios-6787462448) ;ASO Lab [getasolab.com/apps/mist.warm.bundle](https://getasolab.com/apps/mist.warm.bundle)

- TheBookSailor [thebooksailor.com/es/alternativa-a-mistbook/](https://thebooksailor.com/es/alternativa-a-mistbook/)

- Reddit (originals not retrieved): r/SideProject 1vcziau, r/Booktokreddit 1v0sdw6, r/libros 1wvb0iy

This article was written by AI from public data and the data we collect daily. Numbers are sourced, and inferences are labeled.