What a Timegrapher Screenshot Can and Cannot Prove

IntimeWatch editorial team · 2026-11-02 · Practical guide

A timegrapher is an instrument that listens to a mechanical movement’s ticks and calculates figures about how it is running. Screenshots from timegraphers, or from phone apps that try to do something similar, sometimes appear in QC sets and forum posts. They can be useful, but each one captures a short moment under one set of conditions. Knowing what is and isn’t shown helps you avoid reading too much into them.

What the figures describe

• Rate: an estimate of how many seconds per day the watch would gain or lose if it kept running exactly as it did during the measurement.
• Amplitude: how far the balance wheel swings, in degrees. The device calculates it from a lift angle setting that someone enters.
• Beat error: how evenly the balance swings to each side, in milliseconds.
• Beat rate: the number of ticks per hour the device detects or has been set to.

What a single screenshot cannot prove

• Performance over days. A reading taken over seconds or minutes is an extrapolation. Real timekeeping depends on how the watch is worn, how it rests at night and how fully it is wound.
• Behaviour in other positions. Mechanical watches often run differently dial up, dial down and with the crown pointing in different directions. A single screenshot normally shows one position.
• Performance across the power reserve. A freshly wound watch can behave differently from one that has been running for many hours.
• Correct amplitude. If the lift angle setting doesn’t match the movement, the amplitude figure is wrong even when the screen looks clean. The correct value comes from documentation for that specific movement.
• Which watch was measured. Unless the watch and the screen appear together, a screenshot alone doesn’t link the figures to your item.
• Future condition. Knocks in shipping, magnetism and wear can all change how a watch runs after the reading.
• Durability or quality. Good figures on one day aren’t evidence of long-term reliability.

For these reasons, this guide doesn’t suggest pass or fail numbers. What counts as acceptable depends on the movement and on your own expectations, and a single reading is a weak basis for judging either way.

Better questions to ask

• Which position was the watch in, and how long after winding was it measured?
• What lift angle was set on the device?
• Is there a short video showing the watch on the device with the readout?
• Were readings taken in more than one position?

Checking accuracy yourself

You don’t need a timegrapher to learn how your watch keeps time in daily life:

1. Wind the watch as its manual describes, then set it against a trusted time reference, such as your phone’s network time. If the seconds hand can be stopped, line it up. If not, note the starting difference.
2. Wear it normally, and note the difference from the reference at the same time each day.
3. Note how it rested overnight, for example dial up or crown down.
4. After several days, look at the trend rather than any single day.

A log like this reflects how you actually use the watch. If the results change sharply, or the watch stops unexpectedly, consider having a qualified watchmaker inspect it. If the watch has just arrived, also contact the dealer through its official channel.