Why does a background app stop running on Android?
Last reviewed: September 19, 2026 · Markdown version
Android defers background work on purpose. Doze reduces battery consumption by deferring background CPU and network activity for apps when the device is unused for long periods, and App Standby defers background network activity for apps with no recent user activity. An app that promised to do something while you were not looking may simply have been told to wait.
Doze, and the maintenance window
Android's own description of Doze is worth reading slowly: it "reduces battery consumption by deferring background CPU and network activity for apps when the device is unused for long periods of time", and "it also prevents apps from accessing the network and defers their jobs, syncs, and standard alarms".
Work is not cancelled, it is queued: "Periodically, the system exits Doze for a brief time to let apps complete their deferred activities. During this maintenance window, the system runs all pending syncs, jobs, and alarms, and lets apps access the network." That is why a scheduled job can run several times in quick succession after a phone has been left alone all night.
App Standby, and the second brake
Beside Doze sits App Standby, which "defers background network activity for apps with no recent user activity". The two compose: a phone on a table with an app you have not opened in a fortnight is subject to both. How hard the second one bites depends on which bucket Android has put the app in, which is its own subject.
Why apps do not simply ask to be exempt
Because in almost every case they are not allowed to. The same documentation states it flatly: "Google Play policies prohibit apps from requesting direct exemption from Power Management features—Doze and App Standby—in Android 6.0 and above unless the core function of the app is adversely affected." An app that asks you to disable battery optimisation for it is asking for something Play reserves for a narrow set of cases.
Phone makers add their own layers on top of Android's, which is why the same app behaves differently on two phones bought the same week.
Where Adinand Auto File Sorter fits
Background sorting is its Pro feature, and it is scheduled through Android's own WorkManager with no constraints on charging or network — but also with no wake lock and no battery-optimisation exemption permission, for the policy reason above. So the app does the next best thing and watches itself: a health indicator reports when the system has not let the job run, with a help sheet naming the battery settings that do this on Xiaomi, Oppo, Vivo, Realme, OnePlus and Samsung phones. Intervals of every 15 minutes, every hour, every 6 hours or once a day are what you ask for, not what Android promises, and one tap on Sort Now still sorts the folders you watch, whenever you like.
Sources: Optimize for Doze and App Standby, read on 16 September 2026. What the app does comes from its own code audit.