"You already own an AI recorder": Auday sold 300K in seven days, and five copycats showed up a week later
What it is A $9.99 one-time-purchase app that records all day on Apple Watch, transcribes on the phone, and aligns the audio with heart rate and location into a daily timeline.
Why it took off The AI recording feature Apple announced with the September watches was limited to new models, English only, and not available in the China store. Auday launched on National Day to fill that gap. Two waves of spread followed: a launch post from a new X account with paid promotion, and the founder's "300K in seven days" retrospective.
CHow you could follow it Don't build another watch recording app. Copy the formula: go into the regions, languages, and devices that big-company features leave out, bring a hardware category to devices users already own, sell it one-time with no backend, and use a new account's first post plus a small paid push to get traction.
- Data (updated daily) · launched 2026-10-01 · US rating 17 · 11-08 best overall Top Paid rank #17 (China) · charted in 11-08 of 33 stores
iOS · Top Paid overall rank · By store US storeChina storeJapan storeData 2026-10-28 → 2026-11-08 (12 days, 12 observations). Lower rank is higher; gaps mean it wasn't charted that dayiOS · Number of stores charted (top 200 on any chart) Data 2026-10-28 → 2026-11-08 (12 days, 12 observations)iOS · rating count · US store Data 2026-10-28 → 2026-11-08 (12 days, 12 observations). Apple doesn't publish download counts; rating growth is a proxy for downloads.
On the first day of National Day, a University of Science and Technology of China student published his first iOS app: Auday, which turns Apple Watch into an all-day recorder for a $9.99 one-time purchase. He created a new X account, posted a feature intro, spent $200 on promotion, then handed the account to an AI assistant to reply to comments, saying he "didn't dare look." By his own account, the post passed 24M reads in 1 hours, the app hit #1 on several countries' Top Paid charts that day, and it sold over 300K yuan in seven days. Below: why it took off, where it stands now, who's already copying it, and whether you should follow.
What it is
An iPhone + Apple Watch app. Tap once on the watch to start recording, the audio syncs to the iPhone, is transcribed on-device, and is aligned with heart rate, stress, and location from the same time into an hour-by-hour, day-by-day "life timeline," with AI summaries and recaps. The store page opens with: "The best AI recording hardware? You may already have it."
A few design choices explain how it sells. No server, no account signup, and the AI part connects directly to the model with your own API key. That's why it can afford a one-time purchase: US launch price $9.99 (regular $19.9), China store ¥68, Japan store ¥1500, and the store subtitle keeps saying "half price continues." Each sale is almost pure profit.
Why this moment
At the Sep 10 Apple event, Series 12 and Ultra 4 got Audio Intelligence: Siri Recap summarizes your whole day of conversations, and Live Rewind lets you go back over the last 15 seconds. Apple is essentially telling everyone that the watch is now an AI recording device. But it only launches as a beta at the end of the year, English-only, limited to regions where Apple Intelligence is already live, and only on new watches. China-market users, owners of older watches, and Chinese speakers can only watch.
Auday landed right in that gap. A Oct 22 article on Smzdm was titled "China-version watches won't get Siri Recap."
Another point of comparison is AI recording cards. In his retrospective, the author says he bought more than five recording devices in a year: card-style ones stuck to the phone back were bulky, recording pebbles needed separate charging, wearable accessories were awkward, and in the end the watch he already wore every day was the best option. Recording cards at ¥199 to ¥888 sit alongside it, making a $9.99 one-time purchase look very cheap.
Where users came from: one restrained post and a "300K in seven days" story
Traction came in two waves, both on X:
- Wave one: a new account's first post. The author deliberately skipped his personal account (his two earlier open-source projects, BettaFish and MiroFish, had both hit #1 on GitHub trending) and opened @auday_ai instead. The first post only described features, with no story, and came with a $200 promotion. By his account, it passed 24M reads in 1 hours, was reshared by big-name accounts and official accounts, and the official accounts' cumulative reads exceeded 3M.
- Wave two: the founder's retrospective. On Oct 10 he posted a long-form piece from his personal account, "From zero, sold the software for 300K in seven days," and the same day Auday reached #1 on Japan's overall chart (screenshot from the author). The retrospective itself became media material: a Xiaohongshu development diary with 1200 likes and nearly 900 comments, plus Smzdm, QQ News video (10-29, with a headline mistakenly reading "300k dollars"), and Phoenix Video's "After 00, turning the Apple Watch into an AI recorder," each picking up the story in turn.
What's worth copying here is the order: first get the product itself seen, then have a person step out to tell the story, and the storytelling step sparks another wave.
Where it stands now
The peak was National Day week. Since then it has been in decline (App Store charts and ratings, 10-28 to 11-06):
| End of October | 11-06 | |
|---|---|---|
| China overall Top Paid | 13(10-29) | 58 |
| China Lifestyle Top Paid | #1 | #1 |
| Japan overall Top Paid | 55–94 | Dropped out |
| US overall Top Paid | 96(10-29) | Dropped off from 11-01; Lifestyle Top Paid #8 |
| Countries on the Top Paid charts | 38–41 | 36 |
| Ratings count, all storefronts | 37 | 74 |
It now relies mainly on the China Lifestyle Top Paid #1 spot to pull organic traffic. "300K in seven days" and "eight-figure ARR" are the author's own claims, extrapolated from the peak week. Don't treat them as steady-state revenue.
Reviews are polarized: 49 ratings in the China store, averaging about 3.8. The complaints focus on the core function:
"For some reason the watch stops recording and keeps saying the watch recording was interrupted. The core recording feature is broken, and everything else is pointless." (China store, 1 stars, 11-04)
"If a phone call comes in during recording, the recording gets stopped. Restarting it always takes an extra step." (China store, 11-04)
Others say "it can't transcribe, and tapping does nothing" (11-02). Aligning heart rate and stress makes a good story, but what users actually care about is whether the recording is stable and the transcription accurate.
Who it's competing with
Copycats came very fast. As Smzdm put it: "One app blows up, and a whole crowd appears within a week."
- WristMemo: launched 10-17, ¥28 one-time purchase, on-device transcription free forever, with copy nearly lifted from "a recorder on your wrist, from morning to night." 11-06 China store, 23 ratings, now updated to version 2.0.
- VoiceDay: on the US store since May, launched on the China store 10-22, renamed "All-day Watch Recording" to ride the keyword, free.
- There are also Shanniang (upgraded to a "life recorder" running 24 hours continuously), Shiluo (a two-person team from Wuhan University and HKUST), the open-source Nomily, and Auo, previewed on X. These come from a roundup of Xiaohongshu posts and have not been checked one by one.
Established rivals and big companies:
| Product | Scale (US ratings count, 11-06) | How they differ from Auday |
|---|---|---|
| Siri Recap / Live Rewind | Built into the system | New watches only, English only at first, not in the China store, Live Rewind keeps only 15 seconds |
| Apple's Voice Memos on Watch | Built into the system | Records, but no transcription, AI recap, or timeline |
| Just Press Record | 1,526 | A veteran one-time-purchase recorder with 2015 years of history; has transcription, no AI recap |
| Wave AI Note Taker | 12,282 | Meeting notes, $80/year subscription, cloud-based; added watch recording this year |
| Owll | 3,114 | Subscription AI notes with watch support |
| Speakwise | 94 | AI notes with a watch companion, getting customers through a batch of "Best Apple Watch recorder" SEO articles |
| AI recording cards like Plaud | Millions of units | Requires buying separate ¥199–888 hardware, charged separately |
The biggest variable is Apple itself: once Siri Recap opens to Chinese and older watches, the gap Auday started in is gone. Apple hasn't given a timeline.
If it were you
Verdict: copying Auday with another watch recording app isn't worth it. What's worth learning is how it found its opening. Revenue is public, media coverage is wide, five or more copycats appeared within a week, and WristMemo has already pushed the price down to ¥28. The technical barrier is low, and behind it stands Apple, which could close the gap at any time.
Who it suits: indie developers who can write iOS / watchOS, can ship within two weeks, and have some experience growing accounts on X or Xiaohongshu.
Who it doesn't suit: people hoping to live off "watch recording" as a single category for a year or two; teams that need subscriptions or a server to make the numbers work.
How to do it, two paths:
- Do what it does poorly. Recording interruptions, call interruptions, and stuck transcriptions are the entire source of current complaints. A version where recording never drops (auto-resume after calls, auto start/stop during sleep, iCloud sync to Mac; all requests raised in review comments) can own the word "stable," but the window only lasts until Apple opens Chinese support.
- Apply this playbook to a different existing device (more worthwhile). The formula: a big company ships a new capability with region / language / device limits → build it first inside those limits; bring a hardware category's needs to devices users already have (AirPods, Mac microphone, iPhone back sensors, Vision Pro); price it against that hardware's cost as the anchor for a one-time purchase; no backend, bring-your-own key, so one person can sell in several countries at once.
How to get users: Follow the sequence. Launch the new account with one restrained feature post plus a few hundred dollars of promotion; once it takes off, have the founder's personal account post a data-driven retrospective, so the retrospective drives a second wave via Xiaohongshu and media; at launch, run a "launch week half price" banner to create urgency.
Before when: On the watch-recording track, you need to move before Siri Recap officially opens to Chinese and older watches. Based on Apple's pace, the estimate is the first half of next year (estimate). The device-replacement path has no such deadline, but watch for the next Apple event and move fast into the gap where Apple "shipped it but left people out."
What would mean you're reading it wrong: If WristMemo-style cheap copycats take the #1 spot in the China store's Lifestyle Top Paid chart, or if Auday drops out of the US overall Top Paid top 100 and its rating count stops climbing, it means this category was propped up by one event launch plus one wave of spread, not lasting demand. The moment Apple announces Chinese support, the watch-recording track should be abandoned.
Research notes: competitor table, acquisition evidence, full research report
- Competitors
Name Where Launched Scale How it differs from this one Apple Siri Recap / Live Rewind Big-company features 2026-09 launch, beta by year-end Built into the system Only Series 12/Ultra 4, English only, no China-market models, Live Rewind keeps just 15 seconds. Auday supports older watches and Chinese, and keeps every recording. Just Press Record iOS 2015-09 US store rating 1526 Long-established one-time-purchase recorder with transcription, no AI recap or health context Wave AI Note Taker iOS 2023-07 US store rating 12282 Meeting / call notes, subscription, cloud-based. Watch recording is just a side feature. Owll iOS 2023-07 US store rating 3114 Subscription AI notes with watch support, no all-day timeline Whisper Memos iOS 2022-10 US store rating 443 Short voice memos that email out after recording, subscription Speakwise iOS 2025-11 US store rating 94 AI notes plus a watch companion app, growing through SEO blog posts, subscription AI recorder cards / recorder beans (Plaud, Dedao, iFlytek, etc.) Other From ¥2023 Millions of units Requires buying separate hardware for ¥199–888 and charging it separately. Auday's pitch is that you never have to buy hardware again. AideMemo iOS 2026-10-20 US store rating 3 Subscription "second memory" (up to $39.99/month), not built around the watch - Where users come from
- Verified New X account first post + $200 paid promotion: Founder retrospective: newly registered @auday_ai, the first post got $200 in promotion, hit 24M reads in 1 hours, and over 3M cumulative.
- Verified Founder's personal account retrospective long post: @whoisbaifu 10-10 posted "Starting from zero, I sold software for 300K in seven days," backed by the open-source reputation of BettaFish/MiroFish.
- Verified Influencer / official account reposts: The author says multiple influencers and official accounts reposted it; Japanese account @JournalApple recommended it.
- Verified Xiaohongshu: 什么值得买 10-22: developer notes 1200 with many likes and nearly 900 comments
- Verified Media / news video: 什么值得买, QQ News video (10-29), Phoenix Video, jxxy.net, AITNT
- Verified Platform event: Apple 9-10 launched Audio Intelligence, but it's beta only by year-end, English only, and not on China-market models.
- Verified Store ranking + launch half-price: After hitting #1 on Top Paid in several stores, it has held #1 on the China store's Lifestyle Top Paid chart; the subtitle has kept saying "half price continues."
Auday - Watch all-day AI recording (ios_6814210373) research report
Research date 2026-11-06. Storefronts reviewed: the data card's chart distribution across all stores (36 stores charted on Top Paid). For details, see cn / jp / us (appstore library, app_day).
One line
Auday is a one-time-purchase iPhone + Apple Watch app (US store $9.99 launch half price, regular price $19.9; China store ¥68). It turns the watch into an all-day recorder: watch audio is sent to the iPhone, transcribed on-device, then aligned with heart rate, stress, location, and other signals to produce an hourly and daily life timeline and AI recaps. The AI part uses the user's own API key, with no backend and no account registration.
Verdict
It took off mainly because two things converged: timing + distribution.
- Timing: At the 2026-09-10 Apple event, Series 12 / Ultra 4 got Audio Intelligence (Siri Recap summarizes conversations after all-day listening; Live Rewind replays the last 15 seconds). This told everyone that "the watch is already an AI recording device," but it only goes beta by year-end, English only, in regions where Apple Intelligence is live, and only for new watches. China-market users, older-watch users, and Chinese-language users can't use it. Auday launched on National Day's first day, right into that gap (the headline of the 什么值得买 piece 2026-10-22 was "China-market watches can't wait for Siri Recap").
- Distribution: Developer BaiFu (@whoisbaifu, a USTC student and author of open-source projects BettaFish / MiroFish, who has hit #1 on GitHub Trending) opened the official account @auday_ai, posted one feature intro, and spent $200 on promotion. By his account, the post hit 24M reads within 1 hours, got reposts from influencers, and that day it shot to #1 on several Top Paid charts. In Oct 10 he posted a long retrospective from his personal account, "sold 300K in seven days," which sparked a second wave; by Oct 10 it was #1 on Japan's overall chart. After that, Xiaohongshu posts, 什么值得买, and news videos (QQ News, Phoenix Video: "after 00, the Apple Watch became an AI recorder") kept it going.
- Product: They found a pitch with zero hardware cost: "the best AI recording hardware, you may already own." Set against ¥199–888 AI recorder cards, plus the privacy selling points of one-time purchase, no account, and on-device processing, it hits the pain point that all-day recording is scary for privacy.
Growth data (appstore library, 2026-10-28 ~ 11-06)
- All-store rating count: 37 → 74, +7 in the last 26 days; countries on Top Paid dropped from 38–41 to 35–36.
- China store: overall Top Paid rank 13 (10-29) → 58 (11-06), sliding steadily; Lifestyle Top Paid held at #1; rating 24 → 49.
- Japan: overall Top Paid 55–94 (end of October) → 11-06, fell off the overall chart; Lifestyle Top Paid #2.
- US store: overall Top Paid 96 (10-29) → 11-01 before falling off the overall chart; Lifestyle Top Paid 3 → 8; rating 17, nearly flat in the last 5 days.
- Takeaway: The peak came in National Day week (the author claims #1 on several Top Paid charts and #1 on Japan's overall chart). Our library only started recording on 10-28, so we're seeing the decline phase. Right now the main source of organic traffic is the #1 spot on the China store's Lifestyle Top Paid chart.
- User reviews are split: the China-store App Store average rating is 3.7 (51 reviews). In early November, several China-store reviews gave 1 stars, saying "recording cuts out on the watch" and "it won't transcribe." On X, people also report that "any incoming call interrupts the recording" (@DIGITALYCHEE).
Competitors
| Product | Where | Launched | Scale (Apple lookup US rating count, 2026-11-06) | How Auday differs |
|---|---|---|---|---|
| Apple Siri Recap / Live Rewind | Big-company features (watchOS) | 2026-09 launch, beta by year-end | Built into the system | Only Series 12 / Ultra 4, English only, no China-market models; Live Rewind keeps just 15 seconds and doesn't store recordings. Auday supports older watches and Chinese, and keeps every recording. |
| Apple's built-in Voice Memos (Watch version) | Big-company features | Very early | Built into the system | Can record, but no transcription, AI summaries, health data alignment, or timeline |
| Just Press Record | iOS | 2015-09 | 1526 | Long-established one-time-purchase recorder ($6.99), one-tap watch recording with transcription, no AI recap or health context |
| Whisper Memos | iOS | 2022-10 | 443 | Watch recordings emailed after recording; positioned as short voice memos; subscription |
| Wave AI Note Taker | iOS/Android | 2023-07 | 12282 | Meeting / call notes, subscription ($80/year); added watch recording in 2026 years; cloud-based, requires an account |
| Owll | iOS | 2023-07 | 3114 | AI notes with watch recording support, subscription |
| Speakwise | iOS | 2025-11 | 94 | AI notes plus a watch companion app, growing through SEO blog posts (they published a batch of "Best Apple Watch recorder" articles) |
| Plaud, Dedao / iFlytek recorder cards, etc. | Hardware | From ¥2023 | Large volume (millions of units) | Requires buying separate hardware for ¥199–888 and charging it separately. Auday's whole pitch is "no need to buy again." |
| AideMemo | iOS | 2026-10-20 | 3 | "Private second memory," subscription (up to $39.99/month); on the China store's "Others also bought" it's listed alongside Auday |
Copycats (already here, and fast)
- WristMemo (腕记) (id6822356428, developer "悦茨 宿"): listed on 2026-10-17, one-time purchase at ¥28, on-device transcription free forever; the copy is nearly lifted from Auday ("a recorder on your wrist, from morning to night"). Rating count on the China store: 25. 什么值得买 says it hit #34 on the Productivity Top Paid chart on its third day after launch.
- VoiceDay - all-day Watch recording (id6768590252, Chongqing Weilitasi): already on the US store as 2026-05, listed on the China store as 2026-10-22, renamed "all-day Watch recording" to ride the keywords, free.
- Shanli (闪念) (upgraded to "life recorder," recording for 24 hours straight), Shilu (时录) (a two-person team from Wuhan University and HKUST, 10-21), Nomily (open source): sourced from Xiaohongshu posts compiled by 什么值得买 10-22; not verified individually.
- Auo (auobot.com, @Mileson07 超级峰): teased on X / Threads, "an AI assistant that records from your Apple Watch, launching soon."
- Original quote from 什么值得买: "One app blows up, and a whole group appears within a week."
Growth channels
| Channel | Evidence | Confirmed? |
|---|---|---|
| New X account first post + $200 paid promotion | Founder retrospective: newly registered @auday_ai, the first post got $200 in promotion, hit 24M reads in 1 hours, and the official account has over 3M cumulative (retrospective reposted by jxxy.net, original is the X article whoisbaifu/2108877558175654224) | Yes (author's own account) |
| Founder's personal account + retrospective long post | 10-10 posted "Starting from zero, I sold software for 300K in seven days"; the bio lists the GitHub reputation of BettaFish/MiroFish; 10-04 shared it to Moments to claim it | Yes |
| Big V / official account reposts | The author says "multiple Big Vs and even some official accounts reposted it"; the Japanese account @JournalApple recommended it in a post | Yes |
| Xiaohongshu | smzdm dev notes: 1200 likes, ~900 recent comments; user feedback mostly came from Xiaohongshu | Yes (secondhand) |
| Media / news videos | smzdm (10-22), QQ News video (10-29, headline misstated it as "$300k"), Phoenix Video, jxxy.net, AITNT coverage; the recall rationale also mentions Founder Park (original not found) | Yes |
| Store chart positions | #1 on multiple countries' Top Paid → long-running #1 in Lifestyle Top Paid, catching organic traffic; a launch half-price discount created urgency, and the store subtitle kept saying "half-price continues" | Yes |
| Platform event | Apple's September release of Audio Intelligence educated the market, but it's unavailable on China-market devices and in Chinese | Yes |
Where the money comes from
One-time purchase: US store $9.99 / China store ¥68 / Japan store ¥1500. No server costs (AI runs on the user's own key, transcription happens on-device), so nearly every sale is net revenue. The author says they made over ¥300 million in 7 days over National Day, and extrapolates that to "tens of millions in ARR." That's extrapolated from peak week and not credible. In our data, it has already dropped out of the US and Japan Top Paid charts as of November.
Visibility
Revenue is public and widely discussed: the founder publicly posted "¥300K in seven days," the X post reached millions of views, and smzdm, QQ News and Phoenix all covered it. Within a week, 5+ copycats appeared in the China store.
Differentiation
- The main differentiator is the pitch, not the technology: "The Apple Watch you already have is the best AI recording hardware," plus a life timeline built from health / stress / location context. The pitch spread especially well after Apple's event, which is one of the main reasons it took off.
- The second layer is privacy architecture + one-time purchase: no backend, no accounts, on-device transcription, bring-your-own key. That matters for people who want to record all day, and it let the author price low with a one-time fee. But copying this is cheap: Wrist Notes (¥28, on-device transcription) and Nomily (open source) do similar things.
- Health-data alignment is currently unique, but the evidence shows users care more about whether recording is stable and transcription is accurate. The most common complaints are recording interruptions, call interruptions, and transcripts that don't line up. So this is a good story, not the reason people stick around.
- The moat is shallow: any developer can call watchOS recording APIs, and if Apple's own Siri Recap expands to Chinese and more devices, the gap closes.
What others can borrow
- A gap created by a platform announcement: a big company announced a new capability, but with regional, language, or device limits, so someone built it first in the space those limits left open.
- The "you already have the hardware" pitch: it moves the need of a hardware category (an AI recording pin) onto devices users already own (AirPods, the back of an iPhone, a Mac mic, Vision Pro, etc.), anchors pricing to hardware prices, and makes a one-time purchase easy to sell.
- No backend + bring-your-own key + one-time purchase: marginal cost is zero, so one person can price low and launch in several countries at once.
- Cold-start playbook: the new account posted just one restrained feature video with a small paid promotion; once it gained traction, the founder used a personal account to post a long retrospective ("¥300K in seven days") to start a second wave, and the retrospective itself became media material.
Still unclear
- "¥300K in seven days" and "3M views" are the author's own claims and unverified; the Founder Park report's original could not be found.
- Launch date: the author says the first day of National Day (10-01); the Apple lookup releaseDate is 10-09 (same for the US and China stores); smzdm lists 10-12. The date may have been reset when the store listing info changed.
- It isn't specified whether the $200 in paid promotion was X ads or another channel.
- Refund rate and real retention are unclear; rating 3.7, with many interruption-related bugs.
- When and in which regions Siri Recap's full release opens Chinese and more devices will determine how long this category stays viable.
Sources
- Author retrospective (reposted): www.jxxy.net/ai/articles/whoisbaifu-auday-apple-watch-record… (original X article x.com/whoisbaifu/article/2108877558175654224)
- smzdm "China-market watches can't wait for Siri Recap" 2026-10-22: post.m.smzdm.com/p/anv9noep/
- QQ News video 2026-10-29: news.qq.com/rain/a/20261029V07G6X00
- X user feedback: x.com/DIGITALYCHEE/status/2109995516851552707; Japanese recommendation x.com/JournalApple/status/2106525553973149734
- Apple Audio Intelligence documentation: support.apple.com/en-us/148354
- Copycats: Wrist Notes apps.apple.com/cn/app/id6822356428; VoiceDay apps.apple.com/cn/app/id6768590252; Auo x.com/Mileson07/status/2110601648322331045
- Competitor scale: iTunes lookup (2026-11-06, US store)
- Chart positions / rating curve: appstore library app_day (2026-10-28 ~ 11-06, cn/jp/us), data card daily_all_countries