ToneCalculator 4+

This is SO much more than a simple metronome app. This free application is so incredible that I paid $6 in support just to say thank you (THANK YOU!).

The metronome portion is easy to understand and operate, but this developer has gone FAR above and beyond anything I ever imagined would come from a metronome.

Also, regardless of the other features, this is the best free metronome app in the App Store. I already tried the other ones on here, and they're either lousy or they try to force you to buy the full version in order for it not to be lousy. I think it is probably very safe to say none of the paid apps could even compare to this one, anyways.

The special features of the app display a whole host of advanced calculations, having to do with the mathematical relationships between pitch frequencies (notes/tones) and musical tempos.
Some of these things I had already attempted to calculate on my own, with marginal success... but was nice to confirm some of my work, and then view many more elements I wasn't even sure how to calculate.

This marvelous developer has made a tremendous effort in providing such a richly featured application.

@Modest Mongrel, thank you so much for your support!!! It's much appreciated in these crazy times. All the best, Klaus

This thing has so much functionality I may never get thru it all. But it works great. What a great tool for learning about music. And customer service is exceptional.

Thank you for your rating!

Good: Tap tempo, start/stop via hitting “m”; fairly easy interface, albeit cluttered; other nice-to-have features for a metronome.
Bad: App’s main window emains “in front” even when you select other apps. It should “go back.” Essentially, you have to quit it to make its window go away so you can see any other app. This is a dealbreaker for me, if developer could fix this I’d happily pay for the app.
Also would prefer if it didn’t make a sound when you hit tap tempo. As a piano teacher I use metronome apps to tap a student’s tempo without them getting distracted by hearing a click. I don’t want to have to turn the volume down to tap tempo, only to turn it back up when I want the Metronome. AFAIK, there’s really no need for Tap Tempo to ever make a sound for anyone.

Thanks for your comment. You can choose now in the latest version, if you want Tap Tempo without sound and if you want ToneCalulator to behave like a normal window.