Call Meter 3G
Call Meter 3G is the most complete monitor app for your Android device: It monitors your calls, text messages and data usage.
Call Meter 3G vs. Call Meter NG
Call Meter 3G is a complete reimplementation of Call Meter NG. Call Meter 3G aka cm3 is more flexible and is able to support most of the providers plans. CM3 even supports most dual sim phones!
The old app is deprecated since 2011 and discontinued since 2018.
Call Meter 3G is able to import rule sets from other users. There is a list of rules contributed by a huge number of contributors. You should check it out before trying to implement your own rules.
Please find a set of screenshos here
Please follow this link
./gradlew assemble to build the app.
Please fork and send a PR. I'll merge most patches. ;)