1. The "Accuracy Anxiety" Problem

Unlike your phone, mechanical watches (Rolex, Omega, Seiko) run on springs and gears. Gravity and friction make them drift. A healthy watch might gain +5 seconds a day, but a damaged one might gain +30s. This tool helps you track that health.

2. How it works (The 24h Test)

This tool replaces the pen-and-paper method.
• Step 1: Tap the button when your watch hits 12:00:00 today.
• Step 2: Come back tomorrow and tap it again at 12:00:00.
• Result: We calculate your exact SPD (Seconds Per Day) drift.

3. Is my watch broken?

• -2s to +2s: Perfect (Superlative Chronometer).
• -4s to +6s: Excellent (COSC Standard).
• -10s to +10s: Normal for most vintage/entry watches.
• > 20s/day: You may need a service or demagnetization.