Timegrapher - watch accuracy for iPhone

Assess mechanical-watch precision on your iPhone

Timegrapher is an iPhone utility that measures how accurately a mechanical watch runs. The app listens through the phone’s microphone to pick up the tick-tock of the movement and converts those sounds into technical readings for hobbyists and technicians alike.

Core capabilities

• Measures amplitude to show the swing of the balance wheel.
• Reports beat error so you can see timing imbalance between ticks.
• Calculates the beat rate to indicate seconds gained or lost per day.
• Detects beats per hour (BPH) for identifying the movement’s cadence.
• Allows setting the lift angle to improve measurement accuracy for specific calibers.

Sound-level and event monitoring

• Lock, impulse, and unlock sounds are shown in real time so you can inspect each phase of the escapement.
• The app visualizes and plays back beat events to help diagnose irregularities.

Trend tracking and maintenance

Timegrapher logs accuracy and beat-error trends over time, making it easier to monitor changes after servicing or during regular wear. This historical view helps owners decide when a service is needed.

Recommended alternative

• 镜子原理企业版 — Free

Category and development outlook

Listed under utilities and tools, Timegrapher already offers a strong feature set for mechanical-watch enthusiasts and promises additional functions in future updates.