My first two comments echo those of other reviews:
(1) this is what I wanted
(2) The game uses the name Nigeria for both Nigeria and Niger, frustrating to have to guess.
(3) Nice touch for a drill app! He doesn't go through all the items before retrying you on the errors. After you've had some errors, he mixes some retries in with new material. I like this because the errors are still somewhat fresh, and I can learn from them. The obvious way to do drills (hit all items then come back for retries) actually can leave me bewildered with all the unknowns ( as Africa might have done when I first got this app).
I'm a senior--I love geography, but I've forgotten some of the countries I knew as a kid, and a bunch of them have changed!
While I would learn better if I also studied the map occasionally, this simple flash card testing tool was very effective at getting me to learn the countries of Africa.
First time it took over half an hour. Sixth time I think it took less than ten minutes, and I had a much better score.
Yes the tiny countries and especially the islands have very tiny hotspots. (For example, it looks like Gambia can only be separated from Senegal by touching the eastern tip of Gambia.) that, too, is frustrating.
Still, I wanted a visual way to practice reminding myself of geography, and this is it! Five stars from me.