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 of your watch and let AI detect the brand, model, and reference number automatically.
• AI-Generated Portraits — Your watch photos are transformed into stylised, magazine-quality cards for your collection.
• Collection Management — Browse your watches in a stunning gallery with grid, full, and list layouts. Favourite, archive, and organise effortlessly.
• Measurement History — Detailed charts and trends for every watch. Track how precision changes across days, weeks, and months.
• Health Badges — See at a glance whether each watch is running within spec or needs attention.
• Wearing Habits — A calendar heatmap shows which watches you wear and when. Track streaks, rotation stats, and wrist time per watch.
• Offline First — All data is stored locally on your device. Cloud sync keeps your collection safe and accessible 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. Track accuracy over time, spot trends before they become problems, and know exactly when a service is due.
Payments and Renewal
Oscillo includes one-time In-App Purchases and Subscriptions. Payment will be charged to iTunes 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. 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
Ratings & Reviews
5.0
out of 5
3 Ratings
NEW IN 1.3.1
A Refreshed Welcome
The sign-in and username screens have a new editorial look — a colourful gradient that gently drifts in the background, refined typography, and a layout that reads cleanly in light or dark mode.
Elegant New Empty States
The watch collection and precision tabs now greet you with a hand-drawn line-art dial whose hands quietly track the current time. As you add watches and start measurement cycles, the dial steps aside for your data.
Refinements and Polish
Username creation has a clearer length range (3 to 24 characters), the welcome flow feels more cohesive screen to screen, and various small typography and layout improvements have been applied throughout the app.
Version 1.3.1
The developer, Attila Halasz, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
Contact Info
User Content
Identifiers
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Attila Halasz
Size
58.9 MB
Category
Utilities
Compatibility
Requires iOS 26.0 or later.
iPhone Requires iOS 26.0 or later.
Languages
English and 9 more
English, French, German, Hungarian, Italian, Japanese, Korean, Simplified Chinese, Spanish, Traditional Chinese