ToDo Task Manager - Lite by Mike's Android Workshop
This is a great nagger app. I would be lost without it!
There is a
free version and
paid version at the Amazon App Store.
I found this app one night months ago when my hubby was sick and running a high fever. He refused to take anything for it. He wanted to sweat it out.

I needed something to remind me every 30 minutes to go take his temperature to make sure he was okay. Since then this app and me have been inseparable. It nags me to do the dishes, It nags at me to put clothes in the dryer, it nags at me to get the bills together and basically anything I tell it to nag at me about.
It's a to-do list app with reminders. Unlike most apps these reminders can be customized to anyway you want to be nagged.
You can tell it in advance when to start nagging you and you can snooze the nagging if need be. You can loop the nagging sound so it sounds like an alarm. I set it to start at a certain time and to nag me every 30 minutes. You can prioritize your tasks and there is an calendar view and alot more but what I use it for is the nagging. You can set the reminders to nag you at any time.
It's like having hubby here all the time nagging me.

Seriously with my anemic brain I forget to do alot and if I am caught up in a book... well my whole chore list gets forgotten for the night but this little app wont let me forget it yells and yells till I get off my rear and get whatever it's nagging me about done.
Tonight I bought the Pro version with some of my birthday money. It's well earn its keep and Amazon says it's Fire compatible.