How can I limit data usage depending on whether the screen is on, or off/locked? For example, when the screen is off, data can only be sent and received at a reduced rate. Or, when the screen is off, data connectivity is reduced to 2G. I want to leave data on, but I don't want to let it chew through all of it.
I am aware of the data saver option, but it doesn't do what I want.
You could try CleverConnectivity No Ads.
How it works
CleverConnectivity will automatically turn on and off connectivity
(data/wifi/sync) while screen is OFF.
For example if the user chooses below configuration:
Time On: 2min
Time On Next Check: 1min Time Off: 10m Usage check Interval: 3s
Once the screen is OFF, CleverConnectivity will keep connectivity alive for 2min. Then it will check if data is used during a period of
3s.
If data is used, connectivity will be kept for 1 minute (Time On Next Check).
If data is NOT used, connectivity will be deactivated for 10min. After this, the connectivity will be re-activated and Time On will
kick in.
Once screen is ON, connectivity will be automatically re-enabled.
NB (from author): This app is not yet fully compatible with Android Lollipop 5+ as Google has restricted the access to the method to toggle mobile data programatically
Q & A