Oscillo: Watch Accuracy Meter
Rate, Beat Error & Amplitude
About
This app uses your iPhone's microphone to measure the rate, beat error, and amplitude of mechanical watches. It also identifies watch models, manages your collection with AI-generated portraits, and tracks performance over time. Get detailed reports and reminders to maintain your timepieces.
What's New in Oscillo
1.5.4
July 23, 2026
This update includes bug fixes and performance improvements.
Subscription plans
Oscillo Pro Monthly
Unlock all Pro features.
In-App Purchases
$59.99
Oscillo Pro Lifetime
One-time purchase for all Pro features.
Developer apps
FAQ
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.