Best 66 Days Apps & Games

229+ iOS apps & games curated and reviewed

4.5 avg rating
20 free apps & games
Updated June 2026

Every iPhone needs a few good 66 days apps. We benchmark 229+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.

Top Picks for 66 Days

Life Reset: 66 Day Habit#1

Life Reset: 66 Day Habit by Savvy Tech Limited

Gamified Habit & Streaks Track
Editor's Choice
💪 Health & Fitness
4.7😐(12K ratings)
FreeIn-App Purchases
Life Reset: 66 Day Habit screenshot 1
Life Reset: 66 Day Habit screenshot 2
Life Reset: 66 Day Habit screenshot 3
Life Reset: 66 Day Habit screenshot 4
Life Reset: 66 Day Habit screenshot 5
Life Reset: 66 Day Habit screenshot 6

This app transforms self-improvement into a game by turning your goals into daily quests, rewarding you with XP and streaks. It offers personalized habit programs, gamified progress tracking, and a suite of tools to support your journey.

What We Love

  • 👍 Changing user's life
  • 💡 Exceptional customer service
  • 🚀 Accountability tracking
  • 🚀 Good concept and potential

Room to Improve

  • 💰 Paywall/subscription required
  • 🔒 Lack of customization options
  • 🐛 Buggy UI and performance issues
66 Days - Habit Tracker#2

66 Days - Habit Tracker by Triggger

Creating good habits.
Strong Contender
📊 Productivity
4.1(9 ratings)
FreeIn-App Purchases
66 Days - Habit Tracker screenshot 1
66 Days - Habit Tracker screenshot 2
66 Days - Habit Tracker screenshot 3
66 Days - Habit Tracker screenshot 4
66 Days - Habit Tracker screenshot 5
66 Days - Habit Tracker screenshot 6

This app helps you build lasting habits by encouraging daily repetition over a 66-day period. Set project-specific goals and track your progress with features like memos, photos, and notifications.

66 Days - AI Interview Prep#3

66 Days - AI Interview Prep by Uru Technologies, LLC

AI Banking & Consulting Prep
Worth Considering
📚 Education
4.9(221 ratings)
FreeIn-App Purchases
66 Days - AI Interview Prep screenshot 1
66 Days - AI Interview Prep screenshot 2
66 Days - AI Interview Prep screenshot 3
66 Days - AI Interview Prep screenshot 4
66 Days - AI Interview Prep screenshot 5

Master banking and consulting interviews with daily AI-powered practice. Track your progress on a 66-day journey with personalized feedback on technical, behavioral, and case questions. Improve your resume and gain confidence for top firms.

More 66 Days apps to explore

4
66 Days: Life Reset Plan
66 Days: Life Reset Plan
66 Days: Life Reset Plan
#1 Ranked Self Growth App
Free
📊 Productivity
(0)
5
Kaizen AI: Reset Life 66 Days
Kaizen AI: Reset Life 66 Days
Kaizen AI: Reset Life 66 Days
Life Transformation in 66 Days
Free

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.

AI-powered habit trackingGamified progression systemDaily affirmations and prompts
💪 Health & Fitness
(54)
free with in-app purchases
6
75 Days Challenge Tough & Soft
75 Days Challenge Tough & Soft
75 Days Challenge Tough & Soft
75 soft medium fitness tracker
Free

This app supports a 75-day self-improvement and fitness challenge. It helps users track their daily tasks, stay motivated, and connect with a community of fellow participants. Unlock advanced features with an optional subscription.

75-day challenge trackingProgress monitoringMotivation tools
💪 Health & Fitness
(8.2K)
freemium
7
RiseAI: Life Better in 66 days
RiseAI: Life Better in 66 days
RiseAI: Life Better in 66 days
Habit Tracker - Daily Improve
Free

This app offers a personalized 66-day program to reset your life, build positive habits, and break bad ones. It includes deep work focus tools, an AI mentor for guidance, and daily task management with progress tracking. All your data is stored locally for enhanced privacy.

Personalized 66-day life reset programDeep work focus mode with app blockingAI mentor chat for personalized advice
🌟 Lifestyle
(2)
free with in-app purchases
8
66 Challenge
66 Challenge
66 Challenge
Build habits in 66 days
Free
📊 Productivity
(0)
9
Days - Keeping track of events
Days - Keeping track of events
Days - Keeping track of events
Count days since/until events
Free

Easily track the number of days passed since or until important events. Monitor progress on habits, celebrate milestones, and stay motivated with customizable timers and streak tracking. Share your progress with others.

Count days since eventsCount days until eventsHabit tracking
📊 Productivity
(436)
free with in-app purchases
10
倒数日 · Days Matter
倒数日 · Days Matter
倒数日 · Days Matter
全新锁屏小组件 不再忘记重要的日子
Free

This app helps you track important dates, from birthdays and anniversaries to deadlines and personal milestones. It offers extensive date range support, cloud synchronization, and customizable categories to keep your memories and tasks organized. Features include historical date lookups and a built-in calculator.

Countdown/count up to any dateCloud synchronizationLunar calendar support
📊 Productivity
(8K)
free with in-app purchases
11
Six Pack in 30 Days - 6 Pack
Six Pack in 30 Days - 6 Pack
Six Pack in 30 Days - 6 Pack
Core, Abs & Home Workout
Free

Achieve toned abs and lose belly fat with a home workout planner. Offers daily routines for all levels, requiring no equipment. Get your dream six-pack in 30 days with guided exercises.

30-day workout routinesBeginner to advanced levelsNo equipment needed
💪 Health & Fitness
(37K)
subscription
12
75 Days Challenge - Reset75
75 Days Challenge - Reset75
75 Days Challenge - Reset75
Her & His Tough, Soft, Medium
Free

This app helps you complete self-improvement challenges with customizable tasks, progress tracking, and motivational tools. Log daily activities, capture progress photos, and generate timelapse videos. All your data is stored securely on your device.

Customizable challenge templatesDaily task logging with multiple input typesProgress photo capture and timelapse video generation
💪 Health & Fitness
(46)
free with in-app purchases
13
My Love - Relationship Counter
My Love - Relationship Counter
My Love - Relationship Counter
by Bjoern Bartels
Free

Track the duration of your relationship with your partner. It generates unique anniversaries based on days, months, and years together. Personalize the app with a photo and receive notifications for special dates.

Relationship duration trackingCustom anniversary generationPartner photo personalization
🌟 Lifestyle
(681K)
free with in-app purchases
14
Days of Empire
Days of Empire
Days of Empire
Heroes Never Die
Free

Lead a mighty empire through strategic land and naval battles. Solve puzzles to aid heroes, summon historical figures, and build an impenetrable fortress. Engage in large-scale PVP, PVE, and Kingdom Wars, and forge alliances to conquer territories and resources.

Puzzle-solving with rewardsAuthentic Ottoman Empire settingSummon historical Ottoman heroes
🎮 Games
(4.9K)
free with in-app purchases
15
Couple Widget : Love Countdown
Couple Widget : Love Countdown
Couple Widget : Love Countdown
Days Together Beautiful Widget
Free

Track your relationship milestones with a beautiful widget. This app helps you count the days together, reminds you of special anniversaries, and allows you to capture and share your love story with your partner.

Days Together counterAnniversary remindersShared Love Story diary
🌟 Lifestyle
(3.1K)
ad-supported
16
Days - Sobriety Counter
Days - Sobriety Counter
Days - Sobriety Counter
Sobriety and Personal Tracker
Free

This app helps you track your sobriety and personal goals with a clean, intuitive interface. Monitor your progress in various units and utilize a convenient home screen widget for quick updates. Report bugs and suggest features directly from the app.

Sobriety trackingPersonal goal trackingMultiple unit display (days, weeks, months, years)
🌟 Lifestyle
(868)
subscription
17
The 5AM Club-66 Days Challenge
The 5AM Club-66 Days Challenge
The 5AM Club-66 Days Challenge
by FORLOGIS s.r.o.
Free

This app guides users through a revolutionary morning routine designed to enhance productivity, health, and serenity. It helps install a daily habit of rising early to achieve astonishing results and elevate one's entire life.

Revolutionary morning routineMaximize productivityActivate best health
📚 Education
(61)
free
18
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
19
Countdown Days - Day Count
Countdown Days - Day Count
Countdown Days - Day Count
Countdown Days Until or Since
Free

Track important upcoming events and past anniversaries with this straightforward countdown application. It helps you visualize the time remaining until significant dates or the duration since memorable occasions.

Event countdownsPast event trackingBeautifully simple interface
🌟 Lifestyle
(310)
free
20
Bingo Country Days Bingo Games
Bingo Country Days Bingo Games
Bingo Country Days Bingo Games
Play Multiplayer Bingo Games
Free

Embark on a journey through country days, unlocking new episodes and winning big rewards. Compete in real-time multiplayer tournaments against players worldwide, earning XP and special awards. Enjoy high-quality graphics, live chat, and helpful boosters in this engaging bingo experience.

Tournament-style playUnlockable episodesReal-time multiplayer
🎮 Games
(9.9K)
free with in-app purchases

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