I haven't used this yet, but for the complainers: Read the description. One of the first things it states is that it's free to download, you get 4 patterns then you have to pay $2.99 for more.
It's not free. Upon opening the app, the directions bring up a website stating that you must pay $2.99 to 'activate' it. It's a complete lie.
Asked me to pay 2.99$ in the first minute of opening the app
4 patterns, then you pay for everything else
Useless Why would you list this as a free app if you cant do anything unless you pay. Bunch of crap
Pay You get 5 charts but to make them yourself you'll have to pay.