Tone Generator!

Don't let the simplicity fool you. It's simplicity is what makes this my go to tone generator app.

I can tune my violin and I can tone my violin plates in helping me make better violins.

It's the only app out there that will allow you to make as many single frequency queues as you want. Its all very simple and easy to use. I would suggest as a feature or addition, to have a direct input box for the frequency entry instead of clicking on the "+" and "-" sign. And, how about a timer for each of the frequency queue. How about an iPad version! Lol, at this point you might as well call it "Tone Generator Pro". Hey, don't take it the wrong way, I like the app as it is already.

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As I go up the scale, tones are all over the place. Tried through the phone speaker and Bluetooth with the same result

I'm an experimental musician that was looking for a small tone generator in which to produce pure sine waves with adjustable frequencies. I also needed a unit that could play more than one wave at a time. This app did the trick (and you can't beat the 99 cent price). The only downfall is that there are other apps that allow much higher highs and much lower subs (none that I've found that can play multiple tones simultaneously, however). Definitely worth the money.