pps. the app didn't take 6 months to develop, but its been that long since I left a full time contract to start out on my own. Also been doing some consulting work and all the other things that come along with running your own business.

Small point that I frequently bring up with posts like these: Put the price on the marketing page - thats generally a first/second qualifier in my decision to purchase the app or not.

Looks nice though, good luck!

Oh great. We have already added many apps for iPhone. Contact us with your idea to convert into Apps supports any version of iPhone. - http://www.kaushalam.com/iphone-application-development.html

Cool. So, I don't know anything about music, but maybe you should consider stating explicitly what instruments you support?

It says this on the front page, under the Specifications tab:

Instrument Types: Any instrument capable of sustaining a tone in the detection range

The pitch detection combined with the pitch pipe means that you can use it to tune almost anything tuneable. I've certainly tuned lots of weird things with Cleartune over the last couple of years. I'm not sure what this app brings to the tuner table, but I'd be interested to find out.

Yes there is a lot of good competition already established in the tuner app area already, so its a daunting market to enter.

A lot of time was spent getting the pitch detection algorithm just right so you get a accurate and stable reading but get it quickly. This was more challenging that I first thought it would be.

Also I felt it would be good to be able to use the pitch pipe without having to keep shifting back and forth between the instrument and guitar for each string so I added an automatic mode where it plays the nearest note back based on the one you played.

So, hopefully this app will prove a worthy contender

Fair cop. This was difficult: Not wanting to clutter the description with a long list of instruments versus limiting the potential applications. Thoughts?

It's there on the site.

What instruments can Stratotune be used with? Stratotune is suitable be used with instruments from the brass, string and woodwind families, including acoustic, classical and electric guitar.

Well, since it's listening to frequencies, any instrument that can be fine-tuned is "supported", but I guess they made this for instruments with cords, like guitar (explains the stratocaster-inspired name) and bass.

Would adding metronome functionality make sense for this kind of app?

I think it could, but then a metronome is often a new app in itself.

Not for a tuning app. But if the aim is to make a musician toolbox, then it's ok.