Buying a used phone is risky.
You never really know if:
- The touch screen has dead zones
- Sensors (gyro, proximity) actually work
- The battery is degraded
- The device has hidden performance issues
Most people just check the basics and hope for the best.
So I built a solution for myself
I created a browser-based tool that runs a full diagnostic test on your phone — no app install needed.
It tests things like:
- Touch screen accuracy (with grid detection)
- Display quality
- Audio & microphone
- Motion sensors
- Camera
- CPU & performance
- Network & storage
- Vibration & more
Why browser-based?
I wanted something:
- ✅ Fast (no downloads)
- ✅ Private (runs locally)
- ✅ Works on any device (Android / iOS)
Real use case
This is especially useful if you're:
- Buying a used phone
- Selling your device and want proof it works
- Troubleshooting hardware issues
Try it here
I'd love your feedback
- What tests would you add?
- Any ideas to improve accuracy?
- Would you trust browser-based diagnostics?
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