Best 21 Days Apps

237+ iOS apps curated and reviewed

4.5 avg rating
17 free apps
Updated November 2026

The best 21 days apps on iPhone average 4.5★ across 237+ titles — we've ranked them by what real users actually keep on their phones. Updated November 2026.

Compare top 21 Days Apps (November 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1The 21 Days ChallengeThe 21 Days ChallengeFree4.7★ (575)YesYesNov 2026
221 Days - Habit Tracker21 Days - Habit TrackerFree—NoYesOct 2026
321 Days: Quit Bad Habits21 Days: Quit Bad HabitsFree—NoNoMay 2026
421 Days - Be Your Best Self21 Days - Be Your Best SelfFree—YesNoMay 2026
521 Days Sugar-Free21 Days Sugar-Free$0.99—NoNoNov 2026
6Habit TrackerHabit TrackerFree4.8★ (149K)NoYesNov 2026
721 days: Breakup Reset21 days: Breakup ResetFree—YesNoJun 2026
821 Days Habit Transformation21 Days Habit TransformationFree—NoYesOct 2026

Top Picks for 21 Days

The 21 Days Challenge#1

The 21 Days Challenge by Kati Pereira

Introduce life changing habits
Editor's Choice
🌟 Lifestyle
4.7😊(575 ratings)
FreeAdsIn-App Purchases
The 21 Days Challenge screenshot 1
The 21 Days Challenge screenshot 2
The 21 Days Challenge screenshot 3
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The 21 Days Challenge screenshot 6

Build lasting habits and transform your life over 21 days with guided challenges. Track your progress, journal your thoughts, and customize your avatar with earned points. Discover new routines for health, productivity, and happiness.

What We Love

  • 🚀 Simple and motivating
  • 👍 Clean design and clear progress tracking
  • 🤗 Genuinely helpful and enjoyable to use
  • 💫 Positive impact on mental health and habits
  • 🌟 Inspirational and encouraging messages
  • 🌱 Helps build healthy routines

Room to Improve

  • 🔍 Lack of search option in community challenges
  • 🔀 Challenges disappear after creation, no way to find them
  • 🤖 Too many ads interrupting the experience
  • 🎨 App could use more customization options

More 21 Days apps to explore

FAQ about 21 Days

What are the best 21 days apps for iPhone?
The 21 Days Challenge tops our 21 days apps ranking as of November 2026, with a 4.7-star average from 575 App Store ratings, and it's free to download.
Yes — 17 of the top 21 days apps we rank are free to download, including The 21 Days Challenge and 21 Days - Habit Tracker.
The 21 Days Challenge shows ads and offers in-app purchases, according to its App Store listing as of November 2026.
We track 237+ 21 days apps on the iOS App Store as of November 2026, ranked by rating, recency, and analysis of real user reviews.

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