A. 1. Calibrate the app: If the app has a calibration feature, use it to ensure that measurements are accurate. Follow the on-screen instructions carefully. 2. Use a physical measuring tool: Cross-check measurements with a tape measure to ensure accuracy. 3. Input measurements manually: If the app allows, input measurements manually instead of relying on automatic ones.

B. 4. Check for updates: Sometimes, measurement inaccuracies can be due to bugs that are fixed in updates. Ensure you have the latest version of the app.