Next Muscle is currently in beta, so please excuse the rough edges.
It's currently a web app, so no app store download is required. You can just log in with the browser on your phone. A native app is coming once we've worked out the kinks with the web version.
The app is free forever to beta testers. When it exits beta the aim is to charge new users a small monthly or annual fee.
We don't collect or sell any personally identifying information. The only data we want is your weights and reps.
The boring reliable kind. The exercise recommendations come from a model that predicts the ideal weight and reps given your history and exercise best practices.