My first knitting app for iOS has been approved for beta testing through Apple's TestFlight program.

Ear Cozy Cap takes a size and a yarn weight and generates a custom cap pattern. I've been working on backend code to generate knitting patterns from raw numbers for the past couple of decades. The current app is a front end for a very small part of that backend engine. From the point of view of the knitter, this app replaces a single knitting pattern.
The app is much more flexible than any knitting pattern on the market. Traditional knitting patterns are tied to a specific yarn and support a small range of sizes. With the app, the knitter has a wider range of sizes and completely free yarn choice.
I am ready to invite potential beta testers to try Ear Cozy Cap on iPad or iPhone. If you or anyone you know both knits and uses an iOS [0] device, please email me at KnitFitter@gmail.com and offer to be included in the beta.
I also welcome folks who don't knit but are willing to put the program through its paces on whatever devices they have.