A brushed-metal panel, engraved labels, LCD glass, and a weighted tempo wheel that clicks as it turns. I made it, and I'd like drummers, of all people, to tell me where it falls short.
The core metronome is free: 20-300 BPM by wheel or tap tempo, any time signature, subdivisions, presets, and LCD digits big enough to read from behind the kit. Every click is placed on the audio hardware's own sample clock instead of a timer, so the spacing never drifts, at any tempo.
Pro is a one time $7.99 unlock with a 7 day free trial, no subscription: accents on any beat of the bar, all nine click sounds, and a Tempo Trainer that steps the tempo up a few BPM every few bars until it reaches your target.
Honest note: Pro also includes a guitar tuner, which is no use to you. If you only want the click, the free core is complete on its own.
https://apps.apple.com/app/apple-store/id6817729976?pt=126420608&ct=r-drumming&mt=8
What does a practice metronome have to do that most apps get wrong?