Ringdroid 2.7.4 is recommended for Android system versions 4.1 ('Jelly Bean') and higher. It fixes a bug reported by users using 'Nougat' (Android 7.x).
Allows the app to read data about your contacts stored on your device, including the frequency with which you've called, emailed, or communicated in other ways with specific individuals. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
Allows the app to modify the data about your contacts stored on your device, including the frequency with which you've called, emailed, or communicated in other ways with specific contacts. This permission allows apps to delete contact data.