Put your name and colours on the My Freedom Number money app, get a ready-to-sell sales page with it, and put both online on your own free link. No code.
Cloudflare's buttons may be named a little differently by the time you do this. Look for “Pages” and “upload.”
Your rights: you can sell access to your branded app link, and use the sales page to sell it, to your own customers for $27 or more. You can't share or resell this Make It Yours tool, the zip file, or the app files themselves, and your customers get no resell rights.