Instant, Ad-Free Phone Ruler — Calibrate with a Coin or Credit Card Anytime

Turn your device into a precise digital measuring tool app wherever you are. When you don’t have a real ruler, simply calibrate with a coin or a credit card and start measuring objects on your phone. Designed for accuracy, speed, and convenience, this app is ideal for everyday tasks, crafting, DIY projects, or quick on-the-go checks.

Enjoy a clean, ad-free experience forever, plus essential features like night mode, saved measurements, and multiple unit options. Whether you need a precise mobile ruler or a reliable phone screen measurement solution, this tool has you covered.

• Pick your units: fractional inches, decimal inches, centimeters, or millimeters
• Calibrate your ruler with a credit card, coin, or real ruler for best precision
• Manually set the ruler to a known length for accurate measurements
• Night mode saves battery on AMOLED screens and reduces eye strain
• Save your measurements for future use — no permissions required