Truly a great idea. It's a shame it only allows official participation through Instagram, as the app requires my location (which I don't want to share) and the

Truly a great idea. It's a shame it only allows official participation through Instagram, as the app requires my location (which I don't want to share) and there's no other way of signing up. But if you already have an account, or if this is not a problem for you, then you should definitely give it a try :)