I am a school teacher and golf coach. I like to group text my golfers with updates now and then. Do to privacy issues, I do not give out my cell number. I previously used Disco for my group sms needs. This was a flawless app and worked great. Now that Disco is no longer supported or working, I need a replacement. My needs are that the app doesn't use my number (which Disco did not), iMessage remains on, SMS remains on. Any ideas? Thanks!