Oscillo: Watch Accuracy Meter
Rate, Beat Error & Amplitude
About
Transform your iPhone into a professional watch timegrapher. Measure rate, beat error, and amplitude using your device's microphone. Organize your collection, track performance over time, and receive AI-powered insights.
What's New in Oscillo
2.0.1
November 11, 2026
• Oscillo is now available in Norwegian Bokmål, Swedish, Danish, and Finnish. • Browse large collections and watch histories more smoothly. Explore updated navigation in Precision Log and clearer measurement cycles and weekly reports. • The updated Timegrapher engine improves tick detection in noisy recordings and can recover some missing amplitude readings. Averages now account for the duration of the audio analyzed. • A redesigned Feed post view. See photos and captions together, and expand captions without losing your place in the Feed. When a photo zooms open, swipe in from the edge to go back.
MoreSubscriptions & In-App Purchases
Oscillo Pro Monthly
Unlock all Pro features.
Developer apps
FAQ
How do I measure my watch's accuracy with Oscillo?
To measure, hold your iPhone upright with its bottom edge gently on the watch crystal. Start recording the watch's ticks and Oscillo will display the rate, beat error, and amplitude.
What watch beat rates does Oscillo support?
Oscillo supports a wide range of beat rates including 12,000, 14,400, 17,280, 18,000, 19,800, 21,600, 25,200, 28,800, 36,000, 43,200, and 72,000 BPH.
Can I use Oscillo offline?
Yes, your saved watch collection and measurement history are available offline on your device. However, cloud sync and AI features require an internet connection.
What are the pricing options for Oscillo Pro?
Oscillo offers a monthly subscription ($6.99/P1M), an annual subscription ($29.99/P1Y with a 7-day free trial), and lifetime purchase options starting at $49.99.
How accurate are Oscillo's measurements?
Accuracy depends on environmental factors. For best results, measure in a quiet room and ensure a strong signal by adjusting the iPhone's position on the crystal.
Does Oscillo have ads?
No, Oscillo does not contain advertisements. The app is free to use with optional Pro features available through purchases and subscriptions.
How often is Oscillo updated?
The latest version, 2.0.1, was released on November 11, 2026. Updates typically address bug fixes and feature enhancements to improve user experience.
What devices is Oscillo compatible with?
Oscillo is designed for iPhone and is available for users aged 4 and up.
