# Timegrapher — Watch Accuracy — Rate, Amplitude & Beat Error > Pocket watch timegrapher for rate, amplitude, and beat error analysis. (iPhone/iPad app by Fotios Avgidis.) - Source: https://appshunter.io/ios/app/timegrapher-watch-accuracy/id6788081843 (this page in markdown: same URL + `.md`) - Developer: [Fotios Avgidis](https://appshunter.io/developer/6787521132) - Category: Utilities, Lifestyle - Price: Free with in-app purchases - Rating: 4.50/5 from 2 App Store ratings - Age rating: 4+ - Requires: iOS 17.0 · 2 MB - Languages: American English - Released: 2026-07-20 - Data updated: 2026-09-08 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/timegrapher-watch-accuracy/id6788081843/reviews.md ## What is Timegrapher? A timegrapher in your pocket: rate, amplitude and beat error from your iPhone's microphone in 30 seconds. Reads through room noise, with amplitude computed from your calibre's own lift angle. First watch free — Pro is one purchase, never a subscription. WHAT IT MEASURES • Rate — seconds gained or lost per day, the number a chronometer certificate is built on • Amplitude — how far the balance swings, the vital sign a watchmaker checks first • Beat error — the tick/tock asymmetry that says the escapement wants adjusting • Beat rate — detected automatically, from vintage 18,000 bph to hi-beat 36,000 bph WHY THE READINGS HOLD STEADY Phone timing apps have a reputation for jumping around, and for amplitude you can't trust. Two things are done differently here. The analyser tracks the room's own noise floor and rejects transients, so a quiet movement stays locked on — it will read a watch through a barking dog. And amplitude is computed from the lift angle you set for that specific calibre, because a wrong lift angle is the single most common reason a phone app reports the wrong swing. Each tick is really three tiny impacts. Timegrapher times every one to a fraction of a millisecond and fits thousands of them against your iPhone's clock — the same principle as a watchmaker's bench machine. YOUR COLLECTION Add every watch with a photo, reference and serial number, year, movement type and lift angle. Every measurement is saved, and charts show the rate drifting across months and years — so a movement slowly going off gets caught early. After each reading you get a plain-language verdict, Excellent through Service needed, with the reasons spelled out. A Guide tab explains every number in plain English. TRACK WHAT IT'S WORTH One tap pulls current Chrono24 asking prices for your exact reference and logs the median — computed on your device, in your own currency. Log what you paid and Timegrapher charts each watch's value over time, its gain since purchase, and your collection's total. PRIVATE BY DESIGN Everything runs on the device. No audio is ever recorded, stored or uploaded. No account, no ads, no tracking. PRICING Your first watch is free, forever. Timegrapher Pro unlocks unlimited watches for a single payment — no subscription. Purchases restore on any device signed into the same App Store account. HONEST LIMITS A quiet room and firm contact between phone and case give the best readings. Results are indicative: a bench machine and a professional's judgement remain the gold standard for service decisions. ## Key features - Measures rate, amplitude, and beat error - Analyzes beat rate from 18,000 to 36,000 bph - Tracks watch collection performance over time - Computes current market value from Chrono24 - Provides plain-language verdicts on watch condition - Processes all data locally for privacy ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Timegrapher Pro | $9.99 | one-time | ## Frequently asked questions about Timegrapher ### What can Timegrapher measure? Timegrapher measures a watch's rate (seconds gained/lost per day), amplitude (balance swing), and beat error (tick-tock asymmetry). It can also automatically detect beat rates from 18,000 to 36,000 bph. ### How accurate are Timegrapher's readings? Timegrapher uses advanced noise filtering and computes amplitude based on the specific calibre's lift angle for improved accuracy. While results are indicative, a bench machine and professional judgment remain the gold standard for service decisions. ### Can I track my watch collection with Timegrapher? Yes, you can add each watch with details like photos, serial numbers, and lift angles. Timegrapher saves all measurements and charts their performance and value over months and years. ### Does Timegrapher have ads? No, Timegrapher is private by design and does not have any advertisements. All audio processing is done on the device, and no data is recorded, stored, or uploaded. ### How much does Timegrapher cost? Your first watch analysis is free. Timegrapher Pro, which unlocks unlimited watches, is available as a one-time purchase, not a subscription. ### What devices does Timegrapher support? Timegrapher is currently supported on iPhone devices. Purchases can be restored on any device signed into the same App Store account. ### How often is Timegrapher updated? The latest version is 2.3, last updated on August 17, 2026. Updates typically include improvements to accuracy, new features, and bug fixes. ### What is the age rating for Timegrapher? Timegrapher has an age rating of 4+. This indicates it is suitable for users of all ages, with no content restrictions. ## Version history (last 5 releases) ### 2.3 — 2026-08-17 IS IT MAGNETIZED? A magnetized hairspring is the most common reason a mechanical watch suddenly starts gaining time — and until now the app could tell you the watch was running fast without telling you why. Timegrapher can now screen for it using the iPhone's magnetometer. It reads the background magnetic field, then reads it again with the watch held against the back of the phone, and reports what the watch is carrying. A clear result means look elsewhere; a strong one means demagnetize before you judge anything else. Every check is kept, so a before-and-after pair shows whether the demagnetizer actually did its job. AIRPODS Bluetooth microphones compress audio down to voice quality, which strips out the tick sounds Timegrapher listens for. The app now notices them before you start and tells you to take them out. A wired earbud pressed against the case is unaffected — that one is a genuinely good technique. YOUR COLLECTION • Drag to reorder your watches • Tap the collection total to see its value over time, and tap the chart to read the value on any date FIXED • Market prices now fetch in your own currency, and typed amounts are read the way your region writes them. Previously an amount entered as "9.150" could be stored as 9.15 — a hundredth of its value. If you have logged prices that look wrong, they can be corrected by editing the entry. • Charts showed the same year repeated across the axis when several measurements fell in one year; they now step down to months, days or times as the span requires. • Buying and restoring Timegrapher Pro is more robust, and now explains itself if the App Store can't be reached instead of appearing to do nothing. • New setup illustrations for the measurement and magnetism screens. • Assorted layout fixes where longer watch names or messages could be clipped. ### 2.2 — 2026-08-02 • Amplitude now reads from the lift angle you set for each calibre • Steadier readings on quiet movements and in noisy rooms • Collection values now fetch in your device's own currency • Drag to reorder your collection • Tap the collection value chart to read any date ### 2.1 — 2026-08-01 • Amplitude now reads from the lift angle you set for each calibre • Steadier readings on quiet movements and in noisy rooms • Collection values now fetch in your device's own currency • Drag to reorder your collection • Tap the collection value chart to read any date ### 2.0 — 2026-07-23 Fresh coat of paint. Smarter price tracker. Better rate detection algorithm ### 1.0 — 2026-07-21 No release notes. ## More apps by Fotios Avgidis - [Unfollowers Tracker: No Login](https://appshunter.io/ios/app/unfollowers-tracker-no-login/id6787521130) - [LifeTrends: Health Insights](https://appshunter.io/ios/app/lifetrends-health-insights/id6787547184) - [Unfriended: Who Deleted Me?](https://appshunter.io/ios/app/unfriended-who-deleted-me/id6792587859) - [Aloud — Text to Speech Reader](https://appshunter.io/ios/app/aloud-text-to-speech-reader/id6795773116) All apps by Fotios Avgidis: https://appshunter.io/developer/6787521132 ## Related topics [automatic watch](https://appshunter.io/ios/topics/automatic-watch) · [tick talk watch](https://appshunter.io/ios/topics/tick-talk-watch) · [backbeat timegrapher](https://appshunter.io/ios/topics/backbeat-timegrapher) · [watchpat one](https://appshunter.io/ios/topics/watchpat-one) · [lepsi watch](https://appshunter.io/ios/topics/lepsi-watch) · [watch amplitude](https://appshunter.io/ios/topics/watch-amplitude) · [yachting b55](https://appshunter.io/ios/topics/yachting-b55) · [ultra watch](https://appshunter.io/ios/topics/ultra-watch) · [oraimo watch](https://appshunter.io/ios/topics/oraimo-watch) · [hyrox watch](https://appshunter.io/ios/topics/hyrox-watch) · [mytime ukg pro](https://appshunter.io/ios/topics/mytime-ukg-pro) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-08.*