Android Question Show notoficacion programmed to several hours

Hello,

I am working on an app that submits notifications several hours apart by a fixed or variable interval. For example, 10:00, 11:00 and 12:00.
After researching the forum I get it to work using a service in background and StartServiceAtExact but I have the following problems

• if the interval is longer than 10 minutes, the first notification is made at the correct time, but the following notifications are moved 2 minutes. That is to say the first occurs at 10:00, the second at 11:02 and the third at 12:02 (that increase of 2 minutes this for an hour or for two hours)
• when the interval is large the system sometimes kills the service and notifications stop occurring.

If anyone could help me, I’d appreciate it.