Chronographer vs Oscillo

Chronographer is for people who enjoy mechanical watches. It does two things: 1. Tracks your watches’ long-term accuracy 2. Records wrist time Chronographer can work with your whole watch collection. Give each watch a name and, optionally, a longer description. Select a picture from your Photos library and add additional notes, such as the watch’s specifications, purchase details, and service history. All information is stored in iCloud and automatically synchronized between your devices. To track a watch’s accuracy, periodically collect data points comparing its indicated time to the current correct time. Chronographer tracks offsets (the difference from the correct time) and daily rate (how many seconds it gains or loses per day). It uses this information to create graphs and histograms that help you visualize your watch’s performance over time. Chronographer also calculates the following metrics: • Average Offset • Max. Positive Offset • Max. Negative Offset • Last Offset • Net Gain/Loss • Best-Fit Rate • Average Rate • Fastest Rate • Slowest Rate • Last Rate • Rate Variance • Best-Fit Rate Drift You can log the watch (or watches) you wear each day. Chronographer’s wrist time tracking feature lets you see which watches you wear the most and how long it’s been since you’ve worn each one. You can use Chronographer to identify positional variation. When you record a data point, include the position (dial up, crown up, etc.) that the watch was stored in. Then, you can restrict the charts and metrics to specific positions and compare the results. Chronographer includes a large digital clock to help when you set your watches. For more information, including a detailed user’s guide, see https://www.rmfrance.net/chronographer

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