Tempochron: Watch Timegrapher

Measure mechanical watch rate, beat error, and timing stability with your iPhone or compatible external microphone.

Tempochron turns your iPhone into a practical timing companion for mechanical watches.

Use the iPhone microphone or a compatible external input to listen to watch ticks, estimate rate, beat error, and timing stability, then save sessions by watch for service notes, regulation checks, and before/after comparisons.

Features:

• Live rate and beat error measurement
• Compatible external wired or USB microphones when iOS exposes them as audio inputs
• Automatic BPH detection for common mechanical movements
• Watch profiles with saved session history
• Multi-position timing sessions for dial-up, dial-down, crown-up, crown-down, crown-left, and crown-right checks
• Signal scope and advanced diagnostics for evaluating recording quality
• CSV, JSON, PDF, and raw audio export tools with Tempochron Pro

Tempochron is designed as a field screening tool, not a certified timing machine. Results depend on microphone contact, background noise, watch position, mainspring state, and movement condition. Use proper bench equipment for final regulation decisions.