# Oscillo: Watch Accuracy Meter — Rate, Beat Error & Amplitude > iPhone watch timegrapher for mechanical watch collectors to measure accuracy. (iPhone/iPad app by Attila Halasz.) - Source: https://appshunter.io/ios/app/oscillo-watch-accuracy-meter/id6759264433 (this page in markdown: same URL + `.md`) - Developer: [Attila Halasz](https://appshunter.io/developer/790905891) - Category: Utilities, Reference - Price: Free with in-app purchases - Rating: 4.80/5 from 22 App Store ratings - Age rating: +4 - Requires: iOS 26.0 · 59 MB - Languages: Brazilian Portuguese, German (Germany), Chinese (Simplified, China), Chinese (Traditional, Hong Kong SAR China), Korean, European Spanish, French (France), Hungarian, British English, Italian and 3 more - Released: 2026-04-09 - Data updated: 2026-09-11 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/oscillo-watch-accuracy-meter/id6759264433/reviews.md ## What is Oscillo? Oscillo is a watch timegrapher for iPhone. Measure rate, beat error, and amplitude — the same metrics a professional watchmaker checks — using just your iPhone microphone. No adapters, no cables, no expensive equipment. Built for mechanical watch collectors who care about precision. HOW TO MEASURE 1. Place the iPhone microphone flat against the watch crystal or case back. 2. Record a few seconds of tick sounds. 3. Get your rate, beat error, and amplitude instantly. KEY FEATURES • Watch Rate Checker — Measure rate (seconds/day), beat error (ms), and amplitude (degrees) in seconds. Works with beat rates from 12,000 to 72,000 BPH. • AI Watch Identification — Snap a photo and let AI detect the brand, model, and reference number automatically. • AI-Generated Portraits — Your watch photos become stylized, magazine-quality cards for your collection. • Collection Management — Browse your watches in a beautiful gallery with grid, full, and list layouts. Favorite, archive, reorder, and organize effortlessly. • Measurement History — Detailed charts and trends for every watch, with health badges that flag whether a watch is running within spec. • Precision Tracking — Run multi-day measurement cycles. Capture manual readings from the dial, watch drift accumulate, and confirm whether a service or regulation actually held. • Weekly Watch Report — A seven-day summary of your collection: average rate, most-worn watch, best reading, and suggested next actions. • Profile and Wearing Habits — A personal calendar of activity, collection milestones, timing performance, and a heatmap that shows which watches you wear and when. • Reminders — Optional local notifications nudge you to log wrist time, capture the next precision reading, or open your weekly report. • Offline First — All data is stored locally on your device. Cloud sync keeps your collection safe across devices. ACCURACY & ENVIRONMENT • Best results in a quiet room — background noise can affect readings. • Place the case back flat against the microphone for a strong, consistent signal. • If readings seem unstable, move to a quieter space or adjust mic position. • Supported beat rates: 12,000 / 14,400 / 17,280 / 18,000 / 19,800 / 21,600 / 25,200 / 28,800 / 36,000 / 43,200 / 72,000 BPH. DESIGNED FOR COLLECTORS Whether you own one watch or fifty, Oscillo helps you understand how each movement performs and know when a service is due. Payments and Renewal Oscillo includes one-time In-App Purchases and Subscriptions. Payment will be charged to your Apple Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Your Apple Account will be charged for renewal within 24 hours prior to the end of the current period. You can manage or turn off auto-renew in your Account settings at any time after purchase. No cancellation of the current subscription is allowed during the active period. Privacy Policy: https://oscillo.app/privacy Terms of Service: https://oscillo.app/terms ## Key features - Measure watch rate, beat error, and amplitude - AI watch identification and model detection - AI-generated watch portraits for collection - Collection management and organization - Detailed measurement history and trends - Precision tracking and multi-day cycles - Weekly watch reports and profile insights ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Oscillo Pro Monthly | $6.99 | per month | | Oscillo Pro Annual | $29.99 | per year | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Founder's Lifetime | $49.99 | one-time | | Oscillo Pro Lifetime | $59.99 | one-time | ## Frequently asked questions about Oscillo ### How does Oscillo measure watch accuracy? Oscillo uses your iPhone's microphone to record the ticking sound of a mechanical watch. By analyzing these sound waves, it calculates the watch's rate (seconds per day), beat error (in milliseconds), and amplitude (in degrees). ### What are the subscription options for Oscillo? Oscillo offers a monthly subscription for $3.99 and an annual subscription for $24.99. The annual plan includes a 3-day free trial. Subscriptions automatically renew unless turned off at least 24 hours before the current period ends. ### Does Oscillo have ads? No, Oscillo does not contain advertisements. The app is free to download and offers in-app purchases and subscriptions for advanced features. ### What devices does Oscillo support? Oscillo is designed for iPhone and is available for devices running iOS. All data is stored locally on your device, with optional cloud sync for safety across devices. ### How accurate are Oscillo's measurements? The accuracy of Oscillo's measurements depends on environmental factors like background noise and proper microphone placement. For best results, use the app in a quiet room and place the iPhone's microphone flat against the watch crystal or case back. ### Can Oscillo identify any watch? Oscillo features AI Watch Identification that can automatically detect the brand, model, and reference number of a watch when you snap a photo. This helps in cataloging your collection. ### How often is Oscillo updated? The latest version of Oscillo is 1.4.4, last updated on June 25, 2026. Updates typically include improvements to accuracy, new features, and bug fixes based on user feedback and technological advancements. ### What is the age rating for Oscillo? Oscillo has an age rating of 4+. This indicates it is suitable for children and adults, with no mature content or themes present in the application. ## Version history (last 5 releases) ### 1.7.0 — 2026-09-09 • Follow a guided measurement plan. With Pro, complete all six positions and compare cycles against a saved baseline. • Use your watch’s on-wrist rate from Precision, its measured resting rate, and your daily wear hours to estimate seconds gained or lost over 24 hours. • Browse your watch’s overview, specifications, Precision tracking, and measurement history in dedicated sections. • Log which watches you wore on past dates in the profile calendar, and view your cached profile offline. • Improved Precision capture and sync, Timegrapher position controls, and collection layout when switching tabs. ### 1.6.1 — 2026-08-18 • Preview support for Omega Co-Axial movements is now available. We're still validating the feature across more watches, so results may vary. • Collection screens and modal panels now adapt smoothly to compact and resizable windows. • The camera and timegrapher screens remain clear and usable as the available space changes. ### 1.6.0 — 2026-08-10 • Preview support for Omega Co-Axial movements is now available. We're still validating the feature across more watches, so results may vary. • Collection screens and modal panels now adapt smoothly to compact and resizable windows. • The camera and timegrapher screens remain clear and usable as the available space changes. ### 1.5.4 — 2026-07-23 This update includes bug fixes and performance improvements. ### 1.5.3 — 2026-07-19 This update includes bug fixes and performance improvements. ## More apps by Attila Halasz - [Countdown Timer](https://appshunter.io/ios/app/countdown-timer/id834599887) All apps by Attila Halasz: https://appshunter.io/developer/790905891 ## Related topics [attila halasz](https://appshunter.io/ios/topics/attila-halasz) · [attila lelko](https://appshunter.io/ios/topics/attila-lelko) · [avoid spikes for watch & phone](https://appshunter.io/ios/topics/avoid-spikes-for-watch-phone) · [watch accuracy meter](https://appshunter.io/ios/topics/watch-accuracy-meter) · [ep horlogerie](https://appshunter.io/ios/topics/ep-horlogerie) --- *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 2026-09-11.*