Is there an app like Sunrise for others to book time on your calendar?

I'm a big fan of Calendly and recently used it to schedule several 30 minute phone calls with a dozen people. There are a few different ways to use it: 1. Connect it to your Google Calendar so it knows when you're available 2. Specify specific days and times your available Then, forward the appropriate Calendly link to the other party and they can select a time that works best for both of you.

Outlook for iOS, surprisingly, has this feature exactly! You can attach availability slots directly to an email.

Pretty similar to calendly but has a more intuitive UI (time blocks instead of weird bubbles) and has the whole kitchen sink of custom features if you buy the pro version.