Touch Metronome 4+

...which is often better than tons of bells and whistles. The developer was also super responsive when there was a bug, so just note that if that other "unstable" review is still hanging around.
Sometimes all you have to do is say "oh hey, there seems to be little bug", and then they're like "cool, I didn't know thanks for telling me" and then they fix it, problem solved. Communication, yay!

Solid value for a simple metronome app. Several different sounds, tempo is easy to set, UI is clean without any stupid bling. NO ADS!

The downside is it doesn’t do different time scales, ergo there’s no way to set a harder/different beat for the start of a measure. That said, it’s totally worth the $0.99 I paid for it.

It’s kind of like an old fashioned metronome. Nothing fancy, just keeps the beat. I like it.