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Best The 21 Days Challenge Apps

193+ iOS apps curated and reviewed

4.5 avg rating
18 free apps
Updated August 2026

If you already know The 21 Days Challenge, this is the deeper bench. 193+ the 21 days challenge apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of August 2026.

Compare top The 21 Days Challenge Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1The 21 Days ChallengeThe 21 Days ChallengeFree4.7★ (543)YesYesAug 2026
221 Days21 DaysFree—NoYesJul 2026
3Be fit 21 - Home workout appBe fit 21 - Home workout appFree4.6★ (613)NoYesAug 2026
4Habit TrackerHabit TrackerFree4.8★ (145K)NoYesAug 2026
521 Day Fitness at Home21 Day Fitness at HomeFree3.9★ (17)YesYesAug 2026
630 Day Fitness at Home30 Day Fitness at HomeFree4.9★ (29K)YesYesAug 2026
7100 Days Tracker100 Days TrackerFree was $0.99—NoNoMay 2026
821 Day Fix® Tracker – Official21 Day Fix® Tracker – OfficialFree4.6★ (2.5K)NoNoAug 2026

Top Picks for The 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
The 21 Days Challenge screenshot 2
The 21 Days Challenge screenshot 3
The 21 Days Challenge screenshot 4
The 21 Days Challenge screenshot 5
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

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
Be fit 21 - Home workout app#3

Be fit 21 - Home workout app by Denis Vasyanin

Lose weight in 21 days
Worth Considering
💪 Health & Fitness
4.6(613 ratings)
FreeIn-App Purchases
Be fit 21 - Home workout app screenshot 1
Be fit 21 - Home workout app screenshot 2
Be fit 21 - Home workout app screenshot 3
Be fit 21 - Home workout app screenshot 4

This app offers home workouts designed to help users lose weight, build muscle, and improve overall fitness. It features 50 exercises across three difficulty levels, with programs structured over 21 days to build consistent habits.

More The 21 Days Challenge apps to explore

4
Habit Tracker
Habit Tracker
Habit Tracker
Goal Tracker & ADHD Planner
Free

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.

Build and quit habitsFlexible goal tracking with specific unitsGroup habits and friendly competition
📊 Productivity
(145K)
free with in-app purchases
5
21 Day Fitness at Home
21 Day Fitness at Home
21 Day Fitness at Home
21 Day Challenge For Fitness
Free

This app offers a 21-day fitness challenge designed for women, providing at-home workouts without equipment. It features customizable plans, progress tracking, and voice-guided coaching to help users achieve their fitness and weight loss goals.

21-day fitness and weight loss challengeNo equipment home workoutsCustomizable training plans
📊 Productivity
(17)
free with in-app purchases
6
30 Day Fitness at Home
30 Day Fitness at Home
30 Day Fitness at Home
Home Workout for Women To Burn
Free

Achieve weight loss and muscle gain with personalized home workout plans and professional guides. This app offers a variety of exercises and customized routines, with an AI trainer to answer your fitness questions. See results in 30 days with zero equipment needed.

Personalized workout plansZero-equipment home workoutsAI fitness trainer
💪 Health & Fitness
(29K)
subscription
7
100 Days Tracker
100 Days Tracker
100 Days Tracker
Track it. Share it.
Free
$0.99 | 100% OFF

This app helps you build lasting habits by tracking your daily progress on up to 100-day challenges. Customize your goals with themes and layouts, and share your achievements. Widgets offer at-a-glance progress updates.

Track multiple 100-day challengesHome screen widgets for progressCustomizable color themes
🔧 Utilities
(0)
free
8
21 Day Fix® Tracker – Official
21 Day Fix® Tracker – Official
21 Day Fix® Tracker – Official
by Beachbody, LLC
Free

Easily monitor your nutrition and workouts with this official tracker. Log colored containers for meals, track water intake, and access daily workout plans. Monitor progress with body measurements and maintain your results with a dedicated maintenance mode.

Nutrition tracking with colored containersDaily workout plan accessWater intake monitoring
💪 Health & Fitness
(2.5K)
free
9
21 Days Habit Transformation
21 Days Habit Transformation
21 Days Habit Transformation
Daily Routine & Goals Planner
Free
$5.99 | 100% OFF
💪 Health & Fitness
(0)
10
75 Days Tough & Soft Challenge
75 Days Tough & Soft Challenge
75 Days Tough & Soft Challenge
Discipline, Fitness & Focus
$1.99
$2.99 | 33% OFF
💪 Health & Fitness
(0)
11
75 Days Challenge - Rethrive
75 Days Challenge - Rethrive
75 Days Challenge - Rethrive
Soft, Hard & Tough Routines
Free
💪 Health & Fitness
(0)
12
30DC: 30 Day Challenge
30DC: 30 Day Challenge
30DC: 30 Day Challenge
by Branko Popovic
Free
💪 Health & Fitness
(0)
13
Sanctuary Challenge
Sanctuary Challenge
Sanctuary Challenge
The Sanctuary men's challenge
Free
📊 Productivity
(0)
14
Challenge Accepted App
Challenge Accepted App
Challenge Accepted App
Discover, track and complete
Free

This app helps you discover, track, and complete personal challenges. It offers hundreds of pre-made challenges and allows you to create your own or join friends. Set reminders and track progress for health, fitness, reading, travel, and more.

Discover pre-made challengesCreate custom challengesTrack progress for various goals
🎬 Entertainment
(3)
free
15
21-Day Happiness Challenge
21-Day Happiness Challenge
21-Day Happiness Challenge
Feel better in minutes a day!
Free
🌟 Lifestyle
(0)
16
100 Day Challenge
100 Day Challenge
100 Day Challenge
by Goals Guy, LLC
Free

This app provides a system, tools, and growth hacking strategies to transform your life and career in 100 days. It offers a master class in exponential growth, focusing on performance sprints and superior execution strategies to bridge the gap between intentions and results.

System for exponential growthTools and growth hacking strategies100-day transformation program
📊 Productivity
(17)
freemium
17
21 Days – AI Challenge
21 Days – AI Challenge
21 Days – AI Challenge
AI-powered challenge tracker
$0.29
$2.49 | 88% OFF
🌟 Lifestyle
(0)
18
75 Day Tough Challenge
75 Day Tough Challenge
75 Day Tough Challenge
75 Medium, Hard & Soft Tracker
Free

This app helps you build discipline and track habits for various 75-day challenges, including 75 Soft, 75 Medium, and 75 Mom. It offers customizable habit tracking, progress visualization, and smart reminders to keep you consistent and accountable.

Track 75 Soft, Medium, or Mom challengesCustomize up to 6 daily habitsVisual streak and progress tracker
💪 Health & Fitness
(83)
free with in-app purchases
19
Challenge: Your Best Version
Challenge: Your Best Version
Challenge: Your Best Version
by Daniel Reimus
Free

This app helps you expand your comfort zone by offering over 80 diverse challenges. You can tackle them solo or with friends, customize existing ones, or create your own. Document your progress with images and notes, and set daily reminders to stay on track.

80+ diverse challengesGroup challenges with friendsCustomize or create challenges
📊 Productivity
(0)
free
20
StepStreak - 21 Day Walk
StepStreak - 21 Day Walk
StepStreak - 21 Day Walk
by Rajesh kumar Thiagarajan
Free
💪 Health & Fitness
(0)

FAQ about The 21 Days Challenge

What are the best the 21 days challenge apps for iPhone?
The 21 Days Challenge tops our the 21 days challenge apps ranking as of August 2026, with a 4.7-star average from 543 App Store ratings, and it's free to download.
Yes — 18 of the top the 21 days challenge apps we rank are free to download, including The 21 Days Challenge and 21 Days.
The 21 Days Challenge shows ads and offers in-app purchases, according to its App Store listing as of August 2026.
We track 193+ the 21 days challenge apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
The 21 Days Challenge app helps users introduce and build life-changing habits over a 21-day period. It offers various challenges focused on health, productivity, happiness, and more. Users can track their progress, journal their experiences, and engage with a community.
The app offers a diverse range of challenges, including starting a healthy lifestyle, taking breaks from the internet, practicing gratitude, improving productivity, finding happiness and calm, studying effectively, spreading kindness, and fixing sleep schedules. It also includes daily positive affirmations.