Phone Timegraphers: Capable but Limited

Your Phone as Timegrapher

Dedicated timegraphers cost $100+. Your phone microphone can approximate several of their functions. Here is what apps can and can't do.

What Phone Apps Do Well

• Daily rate estimation: hold the watch mic-to-crystal; apps measure tick intervals
• Trend tracking: log readings over weeks to catch drift early — pairs with our health log method
• Beat rate verification: confirms 21,600 vs 28,800 vph

What They Can't Match

Using Apps Sensibly

1. Place the watch crystal-down near the mic in a quiet room
2. Take 3 readings and average — ambient noise skews single samples
3. Treat results as trends, not gospel — see our what's normal guide

Frequently Asked Questions

Are paid apps worth it?
A few dollars for a well-reviewed app beats guessing — but don't expect amplitude data at any price from a phone mic.

When do I need real hardware?
When regulating yourself — amplitude feedback prevents damage. See our regulation guide.