What about iPhone?

There is no iOS app and none is planned for now. Nor do you need one: Color Memories works just as well in Safari. Open colormemoriesapp.com and, if you want it handy, use “Share → Add to Home Screen” to keep it there like any other app.

Do I need an account?

Pre-registering on Google Play asks for nothing but your Google account, and commits you to nothing: you can cancel it whenever you like. And you do not have to wait to start painting — you can do that right now, here in your browser.

Not to try it: you can paint your first canvas without signing up. With a free account you create unlimited canvases and your artworks follow you between phone and computer. If you were already painting on the web, log in with the same account and everything will be there.

Still stuck? There are more answers in the help centre.