This app never use internet connection for your security.
You can find Phone Book ConTacTs in other colors too, with the same features.
Features include:
Swipe View
ABC side index
Show only group
Starred View
Quick Access View
Recently Used View
Incoming/Outgoing/Missed Call List View
partial match retrieval(Name/Phonetics/Phone number/e-mail address/Nickname/Company Name/Address)
Edit Groups
Add Contacts
Mushroom
Copy information to clipboard
Show/Read QR Code
Email to multi-addresses
Tip:
Tap the Phone Book ConTacTs logo for shortcut to phone.
Long tap to copy phone number or email.
Tested on HTC Desire, HTC Nexus One, MEIZU M9