I don't know whether the developers had any idea or not, while designing thi app. Why delete all? What if I want to select some of the contacts and then delete them together? If I wanted to delete all contacts, I'd simply format the phone and turn the sync from Google account off.
Great for deleting contacts for those accounts you didn't want contacts pulled from. Just be sure to turn off sync on you main accounts until after deletion!
Delete all contacts.... Wow. Just want to delete cloud sync contacts. Crap.
Garbage app. The app deletes all contacts which you could just do through built in settings anyways. You can't specifically delete contacts belonging to a specific group. What a useless app
Works as it says it does. Turned off sync on all of my Google accounts. Use app to delete everything and then turned sync back for selected account.
Horrible You are not given any options to review your contacts App just deletes blindly in bulk. Uninstalled
New: Replaced the old design with Material Design and ultra high resolution images
New: Replaced the old app icon with a new modern icon
New: Introduced the new permission model of Android 6 (Marshmallow)
Improved: Reduced the app size from 2.32 MiB to 2.16 MiB
Changed: Removed unnecessary permissions and added new ones
Changed: Updated internal libraries to the newest versions
Improved: Improved app information, developer information and legal information.
An All-in-One Dialer, Caller ID, Block Spam, Call Recorder, Phone Book & Contact
Best Android recovery app recovers deleted photo, video, sms, contact, call log