Mimstr is an app that doesnt need an app for group messaging. Only 1 person in the group needs the app for registration and setup.
Mimstr, the app, is used for users to register, obtain a 10 digit number to group text through, and monitor their message usage and buy more messages through their iTunes account.
Mimstr, the service, is a group messaging platform that is used for niche markets like sales teams, conferences, field trips, kid events, etc, where the users may not all know each other, but need to communicate easily, and quickly without downloading yet another app, or giving away their personal information.