Watch Timegrapher на Андроид

Rest a mechanical watch against your phone and find out how it is really running.

Watch Timegrapher listens to the escapement through the microphone and reports rate in seconds per day, beat error in milliseconds, and amplitude in degrees — the numbers a watchmaker's timing machine gives you. It also tracks what a timing machine cannot: how far your watch has drifted against atomic time over days.

MEASURE
• Rate, beat error, and amplitude
• Beat rate found automatically, 18000 to 36000 bph
• The classic trace, and a contact meter showing whether the microphone is really hearing your watch
• Lift angles for 66 movements — ETA, Sellita, Seiko, Miyota, Orient, Rolex, Omega, Seagull, Vostok

TRUST THE NUMBER
Every reading carries a margin of error that is measured, not claimed. When the room is too noisy or the contact too poor, the app says so instead of inventing a number, and every reading is explained in plain language.

TRACK IT OVER DAYS
Tap as the second hand passes a mark, or photograph the dial, and the app works out the drift against a time server. Reminders at 6, 12, and 24 hours after setting.

SEE HOW IT BEHAVES
Rate over time, rate by position, and rate against amplitude as the mainspring runs down.

KEEP THE COLLECTION
Wear tracking and rotation, photos, purchase and service records, a home screen widget, quartz watches, backups you control, and a spreadsheet export.

FREE, AND PAID
Measuring is free, always — and so is exporting your data. One payment unlocks full history, the charts, records, rotation, the widget, and unlimited watches. No subscription.

PRIVATE
No account, no servers, no analytics, no ads. The internet is used only to ask a public time server what time it is.

Not a substitute for a watchmaker's timing machine. Readings depend on your phone's microphone and how the watch rests against it.

Increased movement lift angle list to 3000+