Do you actually want my secret? I don't believe it would be applicable considering I am using a computer, though. Modding on a phone is. A choice I do not want to make.
Modding in app purchases in android without using lucky patcher is actually very easy, I've done it numerous amounts of time.
The only problem is, telling people since i only do it when i could not find a mod on the internet, and does not want the author's revenue to be broken.