Know how much data you have left, and how long it will last.
An iPhone app that counts cellular data per SIM, forecasts the day your allowance runs dry, and shows it without opening anything.
Nothing leaves your phone.
No account, no login, no server, no analytics, and no VPN profile rerouting your traffic in order to measure it. The counting happens on the device, from numbers iOS already keeps.
What it does
- Counts each SIM separately. iOS reports which line is carrying data, so two plans are attributed automatically rather than picked by hand.
- Fits your plan. Monthly on a fixed date, a 30 day pack, four weeks, a 365 day annual plan, or a prepaid top up that does not renew.
- Warns you in time. Alerts at half, eighty percent and the limit, plus a projected total and the daily rate that would make the pack last.
- Shows its working. A diagnostics screen with the kernel's own byte counters and every reading the app took, flagged where a figure had to be estimated.
About per-app usage
iOS does not report which app used which bytes, and no App Store app can do it without a VPN or a supervised device. If you have seen that promised in a screenshot, it was not on iPhone.