If your iPhone or iPad is on iOS9 or later, the photo feature does not work and may cause app to crash. This is because the app is only validated up to iOS8.
Other most likely cause is that the app did not install properly when downloaded – this can occur if there is an internet or App Store disruption during download (even a microsecond can cause this). In order to fix this, you will need to reinstall the app on your device. Please delete the app, then reboot your device, then redownload the app. If you have synced your recipes, then when you reinstall it the recipes will sync back to the app.
Please also check you device memory (in Device Settings > General > About) as low memory can also cause this problem.← App keeps on crashing