Welcome to Android Central! If you're concerned enough about this, do a factory reset, and then reinstall all of your apps. Follow these steps:
1. First, backup or sync all of your important data.
2. Then do the factory reset from Settings>Backup & Reset.
3. After the rest, finish the Setup Wizard, then go immediately to the Play Store and stop any app that might be automatically installing.
4. Now start reinstalling your apps one by one.
Make sure you have a good screenlock password, PIN, or pattern, and don't share it with anyone.
10-06-2015 10:42 PM