A. 1. Restart your iPhone: Sometimes, a simple restart can resolve app crashes. Press and hold the power button until you see the 'slide to power off' option. Slide it, wait for the device to turn off, and then turn it back on. 2. Clear the app cache: Go to Settings > General > iPhone Storage. Find the Light Pollution Map app, tap on it, and select 'Offload App'. This will remove the app but keep its documents and data. Reinstall the app from the App Store to clear any corrupted cache.

B. 3. Check for iOS updates: Go to Settings > General > Software Update. If an update is available, download and install it. Sometimes, app crashes are due to compatibility issues with the iOS version.