Alternatives

Products that do what Protocol66 does

66-day habit challenge. Miss a day, start over.

1. 1
   Streaks66▲218

   Daily habits tracker with AI

   2024

2. 2
   21 Days Challenge▲96

   A set of challenges to be accomplished every day for 21 days

   2019

3. 3
   Rabbit Habit Tracker▲114

   A minimalistic habit tracker with a powerful iOS14 widgets

   2021

4. 4
   22 Days▲105

   Start to effectively control your habits

   2019

5. 5
   100-Day Habit Tracker▲121

   Build long-lasting habits with the 100 day habit challenge

   2023

6. 6
   TwentyOne▲108

   Build habits in manageable bites, together

   2023

7. 7
   #90DaysOfProse▲181

   Make writing a habit

   2021

8. 8
   21 Days Habit Tracker▲106

   Establish the foundation of success - a one simple habit

   2023

9. 9
   Fast Habit Print▲160

   Print a page. Track your habit. Free and simple.

   2019

10. 10
    Law of 100▲194

    Make or break a habit in 100 days.

    2022

11. 11
    Make It A Habit▲79

    Set a habit and a price. If you fail, you pay.

    2019

12. 12
    Habit Challenge▲101

    Form new habits and keep your life on track

    2018

13. 13
    Habitz ▲96

    Goal planner & progress

    Jan 2026 · apps.apple.com

14. 14
    Squad▲166

    Group accountability for positive habits

    2023

15. 15AF
    A free minimalist daily habit tracker▲158

    Hello. I was looking for a simple and clean habit tracker. I went through a few apps but felt they were missing something. I also had some time on my hands, so decided to make my own and share it in case anyone else likes it. Some of the supported features: Streaks based, track and beat your longest streaks Fully useable offline Freezes (similar to Duolingo's streak freezes) Visual map for tracking consistency Pause the app when you need a break or will be away For anyone curious about the tech stack: - React for frontend - Dexie cloud for storage and syncing - Vercel for hosting Link:…

    2024 · rdht.vercel.app

16. 16
    HabitPilot:90 Days Challenge▲3

    AI assisted 90 days cycle based habit tracking app

    May 2026 · apps.apple.com

17. 17
    66-Day Streak▲2

    A focused habit tracker built around the 66-day habit model

    Mar 2026 · 66streaks.com

18. 18
    That's It, I Quit!▲96

    Break any bad habit in 21 days starting today, not someday

    2023

19. 19
    mostly▲6

    A habit tracker that doesn't punish you for resting

    Apr 2026 · getmostly.app

20. 20
    21Days: Build Habits▲12

    Build habits in 21 days

    2025

21. 21
    No Relapse▲62

    Follow your bad habits or addictions and help to beat them

    2019

22. 22
    Youtine▲78

    Develop daily habits with printable habit trackers

    2022

23. 23
    309 System▲2

    Build smart habits in 30-minute cycles

    Mar 2026 · habit-cycle-tracker--ibtihalhamza188.replit.app

24. 24
    ShowUp▲10

    Unf**k your life in 30 days

    2025

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