OPPO or realme reminders not going off?

If reminders on an OPPO or realme phone ring late or not at all, ColorOS or realme UI has limited the app in the background. Allow background activity for the app, turn on auto launch, and lock it in recent apps. Then check that it may set exact alarms and show notifications.

The steps use Buzzley as the example, but they're the same for any reminder or alarm app on these phones.

Why OPPO and realme phones delay reminders

ColorOS (OPPO) and realme UI share the same base, and both manage battery more strictly than stock Android. Two settings decide whether a reminder app can ring:

• Background activity. Without it, the app is restricted as soon as it leaves the screen, and its alarms can be held back.
• Auto launch. Without it, an app that was closed can't start itself again, so it can't set its alarms after a restart.

The recent apps screen adds a third risk: Clear all closes every app that isn't locked.

How to fix it on OPPO and realme

Menu names change between versions. If something isn't where this guide says, search Settings for it.

1. Allow background activity

Open Settings > Apps > Buzzley, tap Battery usage and turn on Allow background activity. On older versions the switch is called Allow background running.

2. Allow auto launch

Turn on auto launch for Buzzley. Depending on the version, it's on the same Battery usage page or under Apps > Auto launch.

3. Lock Buzzley in recent apps

Open the recent apps screen, tap the menu on Buzzley's card and choose Lock. When you clear all apps, Buzzley keeps running.

4. Allow exact alarms

Search Settings for Alarms & reminders, pick Buzzley and allow it. Android needs this permission to ring a reminder on the minute rather than a few minutes late.

5. Allow notifications on the lock screen

In Settings > Apps > Buzzley > Notifications, allow notifications, banners and lock screen notifications. Some phones hide lock screen notifications for new apps.

What Buzzley does on OPPO and realme

Buzzley's Android app treats OPPO and realme as one brand. In its Alarm not ringing? screen, under Steps for OPPO phones, you'll find the first three steps. The Open settings buttons open Buzzley's app info page and, where the phone lets an app open it, the startup list in ColorOS. If the startup list can't be opened on your version, the button opens the app info page instead.

Above the brand steps the screen runs four checks with a Fix button each: "Notifications are off", "Reminders may ring late", "Alarms can't fill the lock screen" and "Battery saver may delay reminders". Open it from Settings > Full-screen alarms > Alarm not ringing?, or tap Help on the banner Buzzley shows on its home screen when a setting blocks reminders.

Test it with a two-minute reminder

After changing the settings, check them with a real reminder. In Buzzley, add a reminder for two minutes from now and set its Notification style to Alarm. Lock the phone, put it face down and wait. It should ring full screen on the alarm volume at the minute you set. If it rings late, open Alarm not ringing? again and look for a check that still fails. If it rings on time with the screen locked, also try once with the phone left alone for a longer stretch, for example a reminder an hour from now, because some battery savers only step in after the phone has been idle for a while.

Common questions

What is the difference between this and the OnePlus steps?

Very little. Recent OnePlus phones run the same system software, so the menus match. The OnePlus guide also covers older OxygenOS versions.

Is closing the app from recents enough to stop it?

Swiping one app away is usually fine. A forced stop, from app info or from a cleaner, cancels Buzzley's alarms until you open it again. Locking it in recents protects it from Clear all.

Will reminders ring after the phone restarts?

Yes. Buzzley sets its alarms again after a restart and rings even before you unlock the phone. Auto launch makes sure the system lets it start.

My phone is a vivo or iQOO

vivo uses different menus. See the vivo guide. For phones not listed, use the general Android battery guide.