To prevent your Android app from having problems due to being an old version of YouMail, you can set your app to Auto-Update, ensuring that your app is always up-to-date.
To set-up Auto-Update:
- Open the Google Play Store
- Tap the Menu (☰) icon and then tap Settings
- Tap Auto-Update Apps and select your preferences
If you are worried about the data cost, check Auto-Update Apps Over Wi-Fi Only as well.