Android App for recording points of interest

Question

I want to have an app where I can record points of interest with a timestamp. I imagine it like this:

1. I start the app
2. I click on "record this point". The app opens a dialogue where I can enter a name.
3. I click on "Save". Now the app records the geo-location, the current time and the name.
4. I stop the app.

I do this a couple of times. Later, I need an export option. I want to get the data outside of the app.

Please note that I don't want continuous recording. I will hike for ~3 weeks and rarely have electricity. Hence continuous recording is not wanted.