Ask HN: Feedback on new saas site with sms scheduling reminders

I was wondering if I could get some feedback on a new saas site I launched

https://www.scheduleio.com/

It basically is a service where if you input your church's schedule, it automatically sends sms reminders.

Now I'm wondering if this might be applicable to things outside of churches so any feedback would be appreciated!

As for the tech stack:

+ rails 4

+ braintree

+ aws/t2.micro

+ twilio