Why did I get a download error from the Google Play Store?

Download error from Google Play Store stating "package file is invalid":

Try to reset the Google Play Store app and the download manager app and download DigiCal again:

Google Play Store app

1. Open your device's main Settings menu.
2. Under "Device", touch Apps or Application manager (depending on your device, this may be different).
3. Swipe to view "All" apps.
4. Select the  Google Play Store app.
5. Under "Cache", touch Clear cache.
6. Under "Storage", touch Clear data. *Please note that this will delete your DigiCal preferences, configuration settings, and color settings.

Download Manager

1. Open your device's main Settings menu.
2. Under "Device", touch Apps or Application manager (depending on your device, this may be different).
3. Swipe to view "All" apps.
4. Select Download Manager.
5. Under "Cache", touch Clear cache.
6. Under "Storage", touch Clear data. *Please note that this will delete your DigiCal preferences, configuration settings, and color settings.

Or you could try to download DigiCal from the web interface of Google Play Store.

1. Go to DigiCal page in Google Play Store and log in with your Google account.

(https://play.google.com/store/apps/details?id=com.digibites.calendar)



2.  Install DigiCal directly on your device through the web version of Google Play




3. Check if DigiCal is succesfully installed on your device!






Insufficient internal memory error: 

1. There could be insufficient free space in device memory. Please check via Device Settings > Application Manager whether you have enough internal memory to download DigiCal.

2. It is also possible that there is insufficient free space in the cache partition. Try restarting your phone to resolve this problem.

3. Follow the instructions on the Google Play troubleshooting guide: https://support.google.com/googleplay/answer/1067233?hl=en