Check out my Simple Lists app for iPhone and Apple Watch. Grocery lists on your wrist!
To type a trademark symbol on a Mac, just press the option and 2 keys at the same time (option+2): ™
To type a registered trademark symbol on a Mac, just press the option and r keys at the same time (option+r): ®
If the shortcuts don't work in your app, you have a few options:Check out my apps for iPhone, Apple Watch, iPad, and iPod touch!
You might also need to know:
How to type a heart symbol on a Mac