GlibChat

GlibChat is a free messaging app for families and close-knit groups.

Install the app, create your group and start chatting instantly. No tedious account creation required. No need to provide your email or phone number.

Use temporary profiles for instant chat with a new person. Just delete the profile if you don't want to be contacted anymore.

If permitted by the user, use the "Location Ping" feature to instantly check location of a contact in your trusted group.

Set reminders on your contact's device. "Hey don't forget to pick up some milk from the store on the way home". The reminder rings on their device at the scheduled time.