SUPPORT · RICE AWN LLC
Ruler: CM, MM & Inches
Welcome to the official support page for Ruler: CM, MM & Inches, developed by Rice Awn LLC.
We are dedicated to providing the most accurate, reliable actual-size measuring experience for all iPhone and iPad users. If you have any questions, feedback, or need assistance, please find the resources below.
Frequently Asked Questions (FAQ)
1. How does the app guarantee 1:1 actual-size accuracy?
Our app utilizes true hardware pixel-density mapping tailored to your specific device model. Unlike camera-based tools, 1 centimeter or 1 inch on your screen corresponds strictly to physical measurements in the real world.
2. How do I calibrate using a card?
- Open Settings (gear icon in the top capsule).
- Tap Credit / Debit Card Calibration.
- Place any standard credit card, debit card, or driver's license vertically over the dashed guide.
- Use the
+or-buttons until the on-screen outline matches your physical card's edges. - Tap Save Calibration. Your calibration ratio will be stored locally.
3. How do I use Caliper Mode?
Tap the 📐 Caliper button in the floating control capsule at the top of the screen (or simply touch the screen with two fingers). Two adjustable horizontal jaws will appear with a live dimension arrow and thickness readout. Drag either jaw to measure objects with precision.
4. How do I restore my "Remove Ads" purchase?
If you reinstalled the app or switched to a new device:
- Open Settings.
- Scroll to the bottom and tap "Already purchased? Restore".
- Your previous purchase will be validated with the App Store and ad-free status will be reactivated immediately.
Contact Us
Need more help or want to suggest a new feature? Our support team is here to help!
- Email: contact@riceawn.com
- Developer: Rice Awn LLC