A stretchy band that bounces: how TypeDraw climbed the paid charts in 76 countries

Apple's foldable iPhone Duo went on sale Oct 23, and a German ad-design firm launched a $4.99 notebook app three days early. Closed, the phone is a small notebook with an elastic band; open, it shows two facing pages. With no ad spend, it sat at #1 in the US Productivity paid chart for 10 days and charted in 76 countries. Below: why it took off, how much of the window is left, and where someone who wants to follow it should go.

A cover that kept a wife playing for three minutes

On Oct 25, a US user gave TypeDraw five stars with the title "Pure Delight". He wrote: "I open this app just to play with the elastic band on the cover, like a stress toy. My wife saw it and sat there playing with it for three minutes."

That rubber band doesn't do anything useful. Pull it outward, it snaps back with a 'boing,' and the phone shakes. TechCrunch called it out by name in its 10-24 piece on fun iPhone Duo apps, saying the animation was "dumb in a fun way." The same week, MacRumors (10-23, launch day) and Phandroid (10-26) also put it on their "worth installing on Duo" lists. It was the only notebook app on all three lists.

What it actually is

A note app designed to look like a real notebook:

• Type with your own handwriting. Write each letter and number on screen once, and in about five minutes it generates a handwriting font of your own. From then on, whatever you type comes out in your handwriting. You can also pick from 12 handwriting fonts the developer designed.
• Lined, grid and dot paper. You can draw, add stickers, and pages turn with a curled-corner animation. You can also search notes by location ("that restaurant I haven't been to in years, what did I write when I was last there").
• No account, no subscription. Notes live on your device or your own iCloud, and you can export to PDF.
• One-time purchase of $4.99 (€5.99 in Germany), requires iOS 26. Starting at 11-02, you can add up to 4 more notebooks beyond the built-in one, each an in-app purchase of $1.99 (App Store page, 11-06).

It's made by Shaped Agency in Erkrath, Germany, a creative ad agency founded in 2016, run by Christoph Dörre and Philip Trautmann. The font was drawn by Phil Traut himself. The agency has only two apps on the App Store. This is a design studio's app, not a tools shop's, and the taste in the product is their real asset.

How fast it grew

Few paid apps get ratings, so don't look at absolute numbers. Look at the trend:

(App Store charts and rating counts by store, 10-28 to 11-06)

Charted countries went from 10-30 to 65 after 76, right when the Duo opened sales in its second batch of 28 countries. US Top Paid overall #10–25, which I estimate means a few hundred sales a day (inference, no public sales figures). At $4.99, that's tens of thousands of dollars a month. Not huge, but real. The reviews are specific: the Duo's two pages, misaligned ink after rotation, Apple Pencil, missing German umlauts. I see no sign of review manipulation.

On Top Grossing it sits mid-table in Productivity and never made the overall Top Grossing chart. A one-time $1.99 purchase plus a small in-app purchase puts a ceiling on it.

Where users come from

First, media lists. When new hardware launches, tech press always writes "what to install on this device". TypeDraw made MacRumors' list on launch day and TechCrunch the next day. Apple's official Duo partners were big names like Netflix, MLB, NYT Cooking and Slack. TypeDraw isn't among them. It earned its spot through media picks.

Second, early Duo owners recommending it to each other. Reviews repeatedly say things like "bought it for my Duo", "Best note app on Duo", "I'm going to spread the word. This should be on every Duo" (US store, 10-31). On X, someone started a thread on "fun iPhone Duo apps", and Japanese users shared it too.

Third, the charts themselves. Sitting at #1 on the Productivity Top Paid chart for 10 days, the chart position itself drives traffic (inference).

Short video barely did anything. The demo videos I could find on TikTok: the one posted by 10-25 has only 1,908 views (11-06). YouTube Shorts has one titled "This App Turns iPhone Duo into a Real-life Notebook".

Ads: none found. It's not in the Meta ad library or the TikTok ad library (the latter only covers Europe). For a design studio with two apps, paid acquisition is probably not a factor (inference).

Why this one

1. Timing was tight. At the Duo's September event, Apple said it had 10M units on first order, and pre-orders sold out in minutes with waits stretching to 2027 years. The first buyers were people willing to spend money and eager to find apps to show off their new device. TypeDraw launched 10-20, three days before release.
2. The shape and the metaphor matched. A book-style foldable closes into a little notebook, so no explanation is needed. The screenshots themselves work as ads, and an editor writing a list is unlikely to miss it.
3. It had small details worth showing off. The bouncy elastic band, the page turns, typing in your own handwriting are the kind of things people hand to the person next to them and say "look at this".
4. One-time purchase, no subscription. Several German reviews specifically thank it for being "ohne Abo" (no subscription). Germany is its best market outside the US, and the developer is also German.
5. Shipping fast. From 10-20 to 11-04 it went from 1.1 to 1.8: added Family Sharing, multiple notebooks, landscape two-page view, PDF export, and in 11-04 it added 11 more interface languages, including Chinese, Japanese and Korean. One US store review: "I asked for multiple notebooks and it showed up within a week."

Its weak spots

• The moat is shallow. Compared with Goodnotes (468k ratings in the US) and Notability (459k ratings), its difference is: "notebook form designed for the Duo, plus handwriting-font typing, plus a one-time purchase." Without the Duo, it's just a pretty niche note app, and media wouldn't write about it. If a big player seriously adapts to the Duo one day, this spot is gone.
• Lifetime buyers are already unhappy. 11-02's 1.7 update charges $1.99 for each extra notebook, and the reviews came in the same day: "$2 per new notebook 😳", "feels like a cash grab." Another user says the update reset all their settings and wiped their own "limited-edition Halloween cover." A German user wrote: "Finally not a subscription, a one-time purchase is yours. That's what you advertised." The rest is people complaining they have to pay again.
• It's still far from a real note tool. Many people want to-do checkboxes, bullet points, bold text, a calendar, PDF attachments, and full-page layouts with flowing text. Without those, it stays a "pretty toy notebook".

Who's competing

The last line is the most telling: several paid apps that took off on the back of the Duo ranked even higher than TypeDraw. What drove them wasn't any single product. It was the first month of a new hardware form factor going on sale. TypeDraw just happened to take first place in the notebook slot.

If it were you

One-line verdict: Building a "Duo notebook" now is late. TypeDraw owns that slot, and media has already written about it. What you can do is use the same playbook: find another category that the Duo's book shape naturally fits but nobody has done well yet, and ship before the Duo reaches more countries and big players adapt.

Who it suits: 1–2 people with a design-led app (this kind of app wins on screenshots that make people tap, not on feature count), who already own a Duo and can ship a polished little product in a week or two.

Who it doesn't suit: Anyone trying to build a big all-in-one note tool to compete with Goodnotes; anyone who can only write code and can't produce the kind of detail that makes people hand their phone to someone else; anyone who wants to sell subscriptions (this crowd pays precisely because it's a one-time purchase).

How to do it: Pick a category where the "notebook, book, spread" metaphor is instantly clear, such as a paper-planner-style schedule book (several TypeDraw reviews ask for a calendar, which it doesn't have), a pocket book reader, a two-page sketchbook, or a small game for two people sharing one device. Design it only for the Duo's postures: closed, open, tent mode, laptop mode, each with its own interface (this is how TechCrunch wrote up Wakeout). One-time purchase of $3–6, no subscription, local storage. The other path is to fix what TypeDraw did badly: in its first two weeks, its custom handwriting fonts only supported Latin letters, and reviews asked for Chinese, Korean, Cyrillic, Vietnamese, and German umlauts. 11-04's 1.8 update added 11 languages, but there's still room for handwriting fonts designed from the start for Chinese characters or kana, for a Duo journal (inference, not verified app by app).

How to get users: Don't buy ads. Before launch, send the app to the outlets that wrote Duo lists (MacRumors, TechCrunch, Phandroid, plus Japanese and German tech sites). Post a "closed / open" comparison image and a 10-second posture-switching video in the Duo user threads on X. Make the first store screenshot show the app on the Duo.

When to be early: In the months while the Duo keeps opening sales country by country, at the latest by early 2027. The window is while media is still willing to write "what to install on the Duo". Once the topic cools, you're left with organic chart traffic alone.

Signs you've misread the situation: ① TypeDraw drops out of the US Productivity Top Paid top 10 before late November, and Duo-exclusive apps as a group vanish from the Top Paid overall top 25 over the same period. That would mean this crowd's enthusiasm lasted only two or three weeks and latecomers couldn't catch up. ② Goodnotes or Apple's own Notes and Journal add a Duo two-page notebook mode, and the notebook metaphor is no longer scarce. ③ Conversely, if TypeDraw still gains a dozen or twenty ratings a day after adding $1.99 per notebook, Duo users are willing to pay small in-app purchases, and this audience is worth more than expected, so move fast.

This applies to anyone building products: when a new form-factor device goes on sale, the first month is when small teams are closest to big media. Editors need to write lists, early buyers are looking for apps worth showing off, and what wins isn't features or budget. It's who shows up first, and whose screenshot makes sense at a glance. For the next moment like this (a new foldable, new glasses, a new sensor), start a month early.

Data and sources

• App Store page, regional charts, rating counts, and reviews: 10-20 to 11-06 (76 storefronts including the US and Germany); release notes are for version 1.8 (11-04).
• TechCrunch 2026-10-24 "These clever apps show off the iPhone Duo's potential"; MacRumors 2026-10-23 "The iPhone Duo Can Be a Tiny Mac, a Toaster, and a Nintendo DS"; Phandroid 2026-10-26 "iPhone Duo Is Making Phones Fun Again With These 8 Quirky Apps".
• iPhone Duo launch and orders: MacRumors 2026-09-09 event coverage, Wikipedia.
• Developer: Shaped Agency's page at the German Web Awards.
• TikTok view counts: searched "typedraw" 11-06; ads: Meta ad library, TikTok ad library (Europe), 11-06 none found.
• Daily sales are estimated from chart positions; no public figures.