Best 21 Days Habit Transformation Apps

231+ iOS apps curated and reviewed

4.7 avg rating
20 free apps
Updated June 2026

Finding the right 21 days habit transformation app can be overwhelming with so many options. We've analyzed 231+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.

Top Picks for 21 Days Habit Transformation

Habit Tracker by Goalify#2

Habit Tracker by Goalify by onebytezero GmbH

Goal Setting & Accountability
Strong Contender
📊 Productivity
4.7(338 ratings)
FreeIn-App Purchases
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Build lasting habits, achieve your goals, and stay accountable with this comprehensive tracker. It offers smart reminders, progress visualization, and group challenges to keep you motivated and committed.

Kaizen AI: Reset Life 66 Days#3

Kaizen AI: Reset Life 66 Days by Ankit Priyadarshi

Life Transformation in 66 Days
Worth Considering
💪 Health & Fitness
4.5(54 ratings)
FreeAdsIn-App Purchases
Kaizen AI: Reset Life 66 Days screenshot 1
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This app guides users through a 66-day journey of personal growth and discipline. It features AI-powered habit tracking with gamified progression, daily prompts, and journaling capabilities to help users build consistency and achieve their goals.

More 21 Days Habit Transformation apps to explore

4
Reload: Reset Life & Lock In
Reload: Reset Life & Lock In
Reload: Reset Life & Lock In
Transform Yourself In 60 Days
Free

This app offers a science-backed 60-day plan to help you build better habits, improve focus, and achieve your goals. It provides personalized plans, progress tracking, and tools to block distractions and quit bad habits.

Custom 60-day plan generationHabit and goal trackingApp and website blocking
💪 Health & Fitness
(956)
subscription
5
Transform 75 : Hard Challenge
Transform 75 : Hard Challenge
Transform 75 : Hard Challenge
75 hard & 75 soft days tracker
Free

This app helps you track progress through a 75-day physical and mental challenge. It provides tools for logging daily tasks, workouts, hydration, and meals, with features to capture progress photos and set reminders. Users can also share their journey and track multiple attempts.

Daily progress trackingWorkout and meal loggingHydration monitoring
💪 Health & Fitness
(1)
free with in-app purchases
6
DayQuest - Build Habits
DayQuest - Build Habits
DayQuest - Build Habits
30-Day Life Transformation
Free
💪 Health & Fitness
(0)
7
Do Habits: Get It Done
Do Habits: Get It Done
Do Habits: Get It Done
Goals, Task & Habit Tracker
Free

Build healthy habits and break bad ones with this goal-setting and progress-tracking app. It allows for multiple daily goal completions and offers customizable features like journals, reminders, and data export. Integrate with Apple HealthKit for automatic tracking.

Set and track goals multiple times dailyDaily, weekly, monthly, yearly trackingCustomizable habit display with icons and colors
📊 Productivity
(17K)
freemium
8
Grit: Daily Habit Tracker
Grit: Daily Habit Tracker
Grit: Daily Habit Tracker
Routines & Goals ADHD Planner
Free

This app helps users build good habits and break bad ones by providing tools for goal achievement. It offers smart reminders, detailed statistics, and integration with Apple Health to support users on their journey. Personalize your experience with customizable themes and track progress easily with widgets.

Habit tracking and goal achievementSmart reminders and notificationsApple Health integration
📊 Productivity
(11K)
free with in-app purchases
9
Days Since: Quit Habit Tracker
Days Since: Quit Habit Tracker
Days Since: Quit Habit Tracker
Sober Time Clean Day Counter
Free

Break free from bad habits with this tracker. Create custom counters for any vice, like smoking, and visualize your progress. Stay motivated by seeing how long you've gone without giving in, helping you achieve your goals.

Custom habit countersTrack progress visuallyMotivation through tracking
💪 Health & Fitness
(18K)
free with in-app purchases
10
(Not Boring) Habits
(Not Boring) Habits
(Not Boring) Habits
Science-backed habit tracker
Free

Build better habits with a fun, guilt-free approach based on science. Focus on consistent repetition rather than streaks, with daily guidance and motivational tools. Customize your experience with unique skins and widgets.

Science-backed habit buildingFocus on 60 repetitionsNo guilt or streaks
💪 Health & Fitness
(5.6K)
freemium
11
Lock In - Transform Yourself
Lock In - Transform Yourself
Lock In - Transform Yourself
Track habits over 75 days
Free

This program guides users through a 75-day journey to build lasting confidence by establishing core habits. It leverages neuroscience to help users create daily evidence of their transformation, fostering self-trust and rewiring neural pathways for sustained change.

75-day habit programNeuroscience-based insightsDaily evidence tracking
💪 Health & Fitness
(0)
free with in-app purchases
12
75 Soft Challenge™ Official
75 Soft Challenge™ Official
75 Soft Challenge™ Official
75 day custom fitness tracker
Free

This app guides users through a customizable health challenge focused on building positive habits like movement, nutritious eating, and hydration. It offers a flexible approach to fitness, encouraging users to feel good about their progress without strict rules.

Customizable challenge goalsHabit trackingProgress monitoring
💪 Health & Fitness
(49)
free with in-app purchases
13
Habitify: Habit Tracker
Habitify: Habit Tracker
Habitify: Habit Tracker
Build Your Routine & Streaks
Free

Build lasting habits and break bad ones with this comprehensive tracker. It offers smart reminders, detailed insights, and organization tools to help you improve daily. Seamlessly syncs across devices and integrates with health apps.

Track habits, routines, and goalsSmart time and location-based remindersHabit stacking for seamless transitions
💪 Health & Fitness
(7K)
freemium
14
Way of Life - Habit Tracker
Way of Life - Habit Tracker
Way of Life - Habit Tracker
Build a better, stronger you
Free

Effortlessly track and transform your daily habits in under a minute. This intuitive tool helps you identify trends, build positive streaks, and achieve a healthier lifestyle with customizable reminders and insightful charts. Unlock your potential for a better, stronger you.

Daily habit trackingPositive streak challengesCustomizable reminders
💪 Health & Fitness
(5.1K)
free with in-app purchases
15
DayStamp - Habit Tracker
DayStamp - Habit Tracker
DayStamp - Habit Tracker
Build Habits, Change Your Life
Free

This app helps you build and maintain good habits daily. Track your progress with widgets, view detailed statistics, and receive AI-powered habit recommendations. Make habit formation easy and sustainable to achieve life-changing results.

Simple and powerful widgetsCalendar and weekly report widgetsDetailed monthly and yearly statistics
📊 Productivity
(484)
free with in-app purchases
16
Habitat - Daily Habit Tracker
Habitat - Daily Habit Tracker
Habitat - Daily Habit Tracker
Set Goals and Track Progress
Free

This app helps you build and maintain positive habits by visualizing your progress as a chain. Set weekly schedules for activities and mark your progress daily to stay motivated and avoid breaking your streak. Features include widgets, custom notifications, and detailed stats.

Build activity chainsSet weekly schedulesHome screen widget
📊 Productivity
(339)
free with in-app purchases
17
iBetter · Habit Tracker
iBetter · Habit Tracker
iBetter · Habit Tracker
7 Days to Develop a Habit
Free

Develop good habits and break bad ones with daily reminders and progress tracking. Earn achievements and view your progress on a calendar. This app encourages you to build positive routines.

Daily reminders and encouragementProgress calendar visualizationOver 100 unlockable achievements
📊 Productivity
(459)
free with in-app purchases
18
Streakster - Habit Tracker
Streakster - Habit Tracker
Streakster - Habit Tracker
Healthy Routines & Daily Goals
Free

This app helps users build healthy routines and break bad habits by providing daily plans, reminders, and progress tracking. It focuses on creating lasting lifestyle changes through consistent daily wins and building streaks.

Daily routine planningHabit completion trackingStreak building
💪 Health & Fitness
(568)
free with in-app purchases
19
22 Days: Habits Tracker
22 Days: Habits Tracker
22 Days: Habits Tracker
Control your Habit. Be better.
Free

This app helps you build new habits or break old ones by tracking your progress over a 22-day cycle. It allows you to mark daily tasks as complete, split habits into subtasks, and receive reminders. Sync your progress across devices and organize habits with groups for a streamlined experience.

Daily habit trackingMark tasks as doneHabit subtasks
📊 Productivity
(60)
free with in-app purchases
20
Habit Tracker : Haby
Habit Tracker : Haby
Habit Tracker : Haby
Build Atomic Habits for Life
Free

Build lasting habits with science-backed techniques. Track progress with custom units, view detailed reports, and stay motivated with daily quotes. Offers smart suggestions and adaptive goals for a personalized journey.

Science-backed habit buildingAdaptive goalsCustom habit tracking
📊 Productivity
(730)
free with in-app purchases