App standby is a battery saving feature that limits what an app can do in the background when you have not used it for a while. The system notices apps you rarely open and restricts their background activity, network access and ability to wake the device. This saves battery and data. On Android it is called App Standby Buckets, and iPhone uses similar automatic learning.
Why this happens
Phones try to spend battery only on apps you actually use. If you have not opened an app in days, there is little reason to let it run tasks or check the network constantly in the background.
Android sorts apps into standby buckets, from active down to rarely used. The less you use an app, the more its background jobs and network access are delayed or limited. iPhone learns your habits in a similar way and holds back apps you seldom open.
Apps you use every day stay unrestricted, so their notifications and updates keep arriving normally.
Is this normal?
Yes. App standby is a normal, built in part of modern Android and iPhone. It runs automatically and needs no setup for most people.
Does it cause any problems?
Sometimes an app you check only occasionally may deliver notifications late because standby held it back. That is the trade off for longer battery life, and it is easy to fix by excluding that app.
How to fix or check it
- On Android, open Settings, Apps, pick the app, then Battery, and choose Unrestricted if you want it to run freely.
- Set it to Optimised for the normal balance, or Restricted to limit it the most.
- On iPhone, keep Background App Refresh on under Settings, General for apps you want updating in the background.
- On iPhone, open the app regularly, since the system prioritises apps you use often.
- If a messaging app delivers late, set it to unrestricted so standby does not delay its alerts.
- Leave standby on for apps you rarely use, as this is where it saves the most battery.
Frequently asked questions
Does app standby stop notifications?
It can delay notifications from apps you rarely open, not usually block them. Set an important app to unrestricted, or open it regularly, to keep its alerts on time.
Is app standby the same as battery saver?
No. App standby always runs quietly per app. Battery saver is a mode you turn on that limits the whole phone more aggressively when the battery is low.
Should I turn off app standby?
There is no single switch, and leaving it on saves battery. Just set individual important apps to unrestricted if their updates arrive too late.