Oscillo vs Ratekeeper

Oscillo turns your iPhone into a timegrapher for mechanical watches. Measure rate, beat error, and amplitude with your iPhone’s microphone. You don’t need an adapter or a separate timing machine. HOW TO MEASURE 1. Hold your iPhone upright with its bottom edge resting gently on the watch crystal. 2. Start recording the watch’s ticks and wait for the measurement to finish. 3. Check the watch’s rate, beat error, and amplitude. KEY FEATURES • Timegrapher — Measure rate in seconds per day, beat error in milliseconds, and amplitude in degrees. See the supported beat rates below. • AI Watch Identification — Take a photo and get AI suggestions for the brand, model, and reference number. • AI-Generated Portraits — Oscillo turns your watch photos into magazine-style cards for your collection. • Collection Management — Browse your watches in a grid, a list, or a large single-watch view. Favorite, archive, or reorder watches to organize your collection. • Measurement History — See how each watch’s measurements change over time. Charts show the trends, and status badges help you interpret the readings. • Precision Tracking — Enter the time shown on the dial and see how much your watch gains or loses over several days. Compare readings from before and after adjustment or servicing. • Guided Measurement Cycles — Record timegrapher readings in different watch positions. With Oscillo Pro, complete all six positions and compare results with a saved reference cycle. • Weekly Report — See your average rate, most-worn watch, and best reading for the week, along with suggestions for what to do next. • Profile and Wearing Habits — See your activity calendar, collection milestones, and how your watches are running. A heatmap shows which watches you wore and when. • Reminders — Optional local notifications remind you to log the watch you wore, enter your next manual reading, or open your weekly report. • Offline Access — Your saved collection and measurements are available on your device. Cloud sync and AI features require an internet connection. ACCURACY & ENVIRONMENT • Measure in a quiet room. Background noise can affect readings. • If the signal is weak, try resting the iPhone’s bottom edge on a different spot on the crystal. • If the readings fluctuate, move to a quieter spot or adjust the microphone 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 keep track of how each one runs. Payments and Renewal Oscillo offers limited free use and optional Pro purchases, including subscriptions and a one-time purchase. Payment will be charged to your Apple Account at confirmation of purchase. Your subscription renews automatically 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 Apple Account settings at any time after purchase. Privacy Policy: https://oscillo.app/privacy Terms of Service: https://oscillo.app/terms

Every mechanical watch has a rate: a few seconds gained or lost each day, as personal to the movement as a fingerprint. Ratekeeper tells you what yours is, exactly, without a timing machine or a trip to the watchmaker. The method is a five-second pleasure. Set your watch to true time. A day or two later, tap the screen the instant the second hand crosses twelve. Ratekeeper compares that tap to atomic network time (accurate to hundredths of a second) and, from two readings, works out the watch's rate in seconds per day. Gaining or losing, and by exactly how much. That's the whole thing. No microphone, no cradle, no gear. Just your watch, your phone, and a tap. WHAT YOU SEE • The rate, plainly. "+5.4 spd". In words, "gains 5.4 seconds a day," so the sign never has to be decoded. • A history that reads like a story. Every reading is grouped into runs (a run begins each time you set the watch) and charted so you can watch a rate settle in as a fresh service beds down, or drift as it comes due for one. • Against a band, if you want one. Hold a watch to −4/+6 seconds a day, or the tighter 0/+5, and see at a glance whether it's keeping to spec. • By resting position. Dial up, crown down, on the wrist: a mechanical watch runs differently in each. Ratekeeper breaks the rate down position by position and even suggests how to rest it tonight to bring it closer to true. • A true-time reference clock. A standalone screen showing network time to the tenth of a second, so you can set any watch against it. BUILT FOR PEOPLE WHO CARE ABOUT WATCHES • Manual, automatic, quartz, or something else: each is measured on its own terms. • Gentle reminders on your rhythm, so readings land a few days apart the way the math wants. • Export every reading to CSV whenever you like. The data is yours to keep. PRIVATE BY DEFAULT No account. No sign-up. No ads. Your watches and readings live on your device and sync across your own devices through your own private iCloud. We can't see them, and nobody is building a profile out of your collection. Find out how your watches really run. Every one of them has a rate. This is how you learn it. Have questions? We're here to help. Email us at hello@slowsundaysoftware.com Terms of Use: https://slowsundaysoftware.com/terms Privacy Policy: https://slowsundaysoftware.com/privacy