This extension allows you to set alarm and open your app screen on given time.
It works on lock screen also.
Alarm will works also after devices is rebooted.
You can cancel registered alarm also.
It is tested in Xioami And Samsung Device (Android 9 and 10)
There is no minimum API level reqiurement.
Ask your any confusion in below 
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Thanks to @chaimk and @Henry for Sponsoring this extension 
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Wow! Another useful extension 
Thank you for your contribution.
However according to Google it is not recommended to open an app automatically at a given time, see also https://developer.android.com/guide/components/activities/background-starts
Android 10 (API level 29) and higher place restrictions on when apps can start activities when the app is running in the background. These restrictions help minimize interruptions for the user and keep the user more in control of what’s shown on their screen. In nearly all cases, apps that are in the background should display time-sensitive notifications to provide urgent information to the user instead of directly starting an activity.
Also starting from Android 10 the app must have been granted the SYSTEM_ALERT_WINDOW permission by the user to be able to restart itself from the background. And in Android 11 this has been even restricted further.
Taifun
PS: I recently released an alarm manager with notification extension, which currently works only in MIT App Inventor, because Kodular stil does not support the Android X libraries, for more information see here App Inventor Extensions: Alarm Manager | Pura Vida Apps
If someone is interested to Build An Alarm Application or it can also be used for many other purposes. That’s why i have made it to start on lock screen.
This extension needs Floating Window Permission + Autostart permission which matches to requirements how it works.
I have made it to do works related to alarm, I personally won’t suggest to use it to pop up app any time but this is right at it’s place for some uses
Thanks
very useful extension…
Another Great Extension 
Great… Your extensions are always useful…
Your contribution are owesome 
So pretty extension!
Always love your extension
Thanks a lot everyone for appreciation 
Is this allow on playstore
If you use it in right way…like alarm apps
Please Add Test or Demo Apk File…
Did some changes in repeating block and added support to run background task on given time (if you have bought the background tasks extension)
Thanks Taifun , do i need to do the alarm manually every day e.g. my app gives the time for sunset and sunrise automatically everyday do i need to set the alarm by myelf everyday
that’s a good question and as the author of the extension is @Atom_Developer he is the one to answer it…
Taifun
There is a blocks to set repeating alarm and you can give 24 hour interval if time is the same daily
If not then as soon as app starts because of the alarm,you can set the next alarm with the next time you want…
Everything is done with blocks, no manual user interaction is required to set alarms…that all can be done automatically by app
You just need to ask user to enable the needed permissions.
thanks for reply ,so as i understand from you that app like mine that need alarm for sunset and sunrise daily as far as you know sunset and sunrise times varies everyday that means i should adjust the alarm daily
It’s simple
As soon as an alarm is fired, your app would automatically retrieve time for next alarm and set it.
