Best 21 Days Challenge Apps

239+ iOS apps curated and reviewed

4.4 avg rating
19 free apps
Updated October 2026

Every iPhone needs a few good 21 days challenge apps. We benchmark 239+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.

Compare top 21 Days Challenge Apps (October 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1The 21 Days ChallengeThe 21 Days ChallengeFree4.7★ (543)YesYesOct 2026
221 Days Challenge21 Days ChallengeFree—NoNoJul 2026
3Habit TrackerHabit TrackerFree4.8★ (148K)NoYesOct 2026
421 Days Habit Transformation21 Days Habit TransformationFree—NoYesAug 2026
521 Days21 DaysFree—NoYesSep 2026
6Be fit 21 - Home workout appBe fit 21 - Home workout appFree4.6★ (613)NoYesAug 2026
721 Days – AI Challenge21 Days – AI Challenge$0.29—NoNoOct 2026
830 Days -  challenge yourself30 Days - challenge yourselfFree—YesNoMay 2026

Top Picks for 21 Days Challenge

The 21 Days Challenge#1

The 21 Days Challenge by Kati Pereira

Introduce life changing habits
Editor's Choice
🌟 Lifestyle
4.7😊(543 ratings)
FreeAdsIn-App Purchases
The 21 Days Challenge screenshot 1
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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
Habit Tracker#3

Habit Tracker by InnerGrow

Goal Tracker & ADHD Planner
Worth Considering
📊 Productivity
4.8😊(148K ratings)
FreeIn-App Purchases
Habit Tracker screenshot 1
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Habit Tracker screenshot 5
Habit Tracker screenshot 6

This app helps you build lasting habits and achieve your goals through simple daily planning and routine tracking. It offers features like syncing with health data, group challenges, and insightful analytics to support your self-care and personal growth journey.

What We Love

  • 👍 Customizable and user-friendly interface
  • 🚀 Efficient and intuitive habit tracking
  • 💡 Comprehensive data visualization and progress tracking
  • 🔒 Secure and reliable app with no ads
  • 💰 Affordable one-time premium purchase option

Room to Improve

  • 🐛 Occasional bugs and glitches
  • 🔒 Lack of iCloud sync and cross-device support
  • 🔒 Limited free version with restricted features
  • 🕰️ Inflexible habit scheduling options

More 21 Days Challenge apps to explore

FAQ about 21 Days Challenge

What are the best 21 days challenge apps for iPhone?
The 21 Days Challenge tops our 21 days challenge apps ranking as of October 2026, with a 4.7-star average from 543 App Store ratings, and it's free to download.
Yes — 19 of the top 21 days challenge apps we rank are free to download, including The 21 Days Challenge and 21 Days Challenge.
The 21 Days Challenge shows ads and offers in-app purchases, according to its App Store listing as of October 2026.
We track 239+ 21 days challenge apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.

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