RGM - Real Gigging Metronome

Fancy sophisticated metronome apps are great for practicing. Not so great for actual live performance though. Too many features, too many tiny buttons, cluttered screen. And, of course, the most terrible evil of them all - THE SOUND.
When you're working with a metronome on stage, often, the less is more.
What do you actually need from a metronome during a real live performance? Steady quarter notes, a giant Start-Stop button, a tempo wheel, and that's it! Oh, and NO SOUND!
This metronome app does exactly that, and just that - it flashes your screen instead of making sounds, and it's got a Start-Stop button, and a Tempo Slider. And that's it.
Looking for a complex automated click pattern with a gap click and auto tempo change? Save it for the practice. This app is for gigging!
Enjoy. It's free!
WARNING: PHOTOSENSITIVITY/EPILEPSY SEIZURES
This app produces bright flashes of the screen. If you or anyone who has access to your device are photosensitive or epileptic, DO NOT DOWNLOAD THIS APP. If you did, and you experience any symptoms usually associated with photosensitive epilepsy, IMMEDIATELY DISCONTINUE USE AND DELETE THE APP.