DuoShare

Most habit apps leave you on your own, and most people quit by week two. DuoShare lets you do your goals with a friend. You see when they've checked in, they see when you have, and nobody wants to be the one who breaks the streak. Run 7, 30 or 66-day challenges with one friend or a group; groups of up to 4 are free. Goals stay private unless you choose to share. Works for workouts, studying, reading, and any daily routine. iPhone only: https://apps.apple.com/us/app/duoshare-habit-tracker/id6799788007