MeasureDeck

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About this app

MeasureDeck is a calibration-first pocket ruler designed for fast everyday screen measurements, on-screen comparisons, and lightweight unit conversion.

**Measure in three modes**
- **Point mode** — Tap to mark a single position and read the value
- **Span mode** — Drag two markers to measure the distance between them
- **Area mode** — Estimate rectangular surface dimensions in real time

**Unit conversion**
Quickly convert between centimeters and inches with a live preview. Save conversions for later reference.

**Precision Lab**
Train your touch-screen alignment with interactive challenges. Each attempt is scored, and your best score is tracked over time.

**History & data management**
All measurements, conversions, and training attempts are automatically saved. Browse, review, or delete individual entries — or clear all history with one tap.

**Calibration control**
Fine-tune the on-screen scale with a dedicated calibration slider to match a known reference card or ruler. Portrait-only layout ensures consistent alignment.

**Privacy-first**
No account required, no data collected, no ads. Everything stays on your device.