Love the idea of the vibration sound effect as a ringtone! I might add it actually, great suggestion :)

Adding the ringtone on iOS is a pain in the ass, I was thinking to add a step by step guide right on the website... Apple provides a guide in their support articles (https://support.apple.com/en-us/120692), it's not difficult but I don't understand the reason honestly. It should be simple with a .m4a file from the Music app, but you need the computer