Best 66 Days Apps & Games

230+ iOS apps & games curated and reviewed

4.7 avg rating
20 free apps & games
Updated July 2026

Every iPhone needs a few good 66 days apps and games. We benchmark 230+ 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 66 Days Apps & Games (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
166 Days - AI Interview Prep66 Days - AI Interview PrepFree4.9★ (228)NoYesAug 2026
2Life Reset: 66 Day HabitLife Reset: 66 Day HabitFree4.7★ (12K)NoYesAug 2026
366 Days - Habit Tracker66 Days - Habit TrackerFree4.1★ (9)NoYesJul 2026
466 Days: Life Reset Plan66 Days: Life Reset PlanFreeNoYesMay 2026
5Kaizen AI: Reset Life 66 DaysKaizen AI: Reset Life 66 DaysFree4.5★ (54)YesYesJul 2026
675 Days Challenge Tough & Soft75 Days Challenge Tough & SoftFree4.8★ (8.4K)NoYesAug 2026
7RiseAI: Life Better in 66 daysRiseAI: Life Better in 66 daysFree4.5★ (2)YesYesJul 2026
8倒数日 · Days Matter倒数日 · Days MatterFree4.8★ (8.1K)YesYesAug 2026

Top Picks for 66 Days

66 Days - AI Interview Prep#1

66 Days - AI Interview Prep by Uru Technologies, LLC

AI Banking & Consulting Prep
Editor's Choice
📚 Education
4.9(228 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.

Life Reset: 66 Day Habit#2

Life Reset: 66 Day Habit by Savvy Tech Limited

Gamified Habit & Streaks Track
Strong Contender
💪 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#3

66 Days - Habit Tracker by Triggger

Creating good habits.
Worth Considering
📊 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.

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
(8.4K)
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
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
(8.1K)
free with in-app purchases
9
66 Challenge
66 Challenge
66 Challenge
Build habits in 66 days
Free
📊 Productivity
(0)
10
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
11
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
(957K)
free with in-app purchases
12
Six Pack in 30 Days: Core, Abs
Six Pack in 30 Days: Core, Abs
Six Pack in 30 Days: Core, Abs
6 Pack 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
(38K)
subscription
13
Countdown Days Since & Until
Countdown Days Since & Until
Countdown Days Since & Until
Quit Habits & Track Events
Free

Track important dates by counting down or up in various time units. Customize events with photos and icons, and receive timely reminders. Sync across devices and share your countdowns easily.

Unlimited event trackingCustomizable event visualsCalendar event import
🔧 Utilities
(2.3K)
free with in-app purchases
14
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
(3.2K)
ad-supported
15
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
16
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
(55)
free with in-app purchases
17
Days + Date + Time Calculator
Days + Date + Time Calculator
Days + Date + Time Calculator
Days Between Two Dates
Free

Calculate the duration between two dates and times. This tool helps you find the exact number of days, hours, and minutes between any two points in time.

Calculate days between datesCalculate duration between dates and timesCalculate duration between times
📊 Productivity
(795)
ad-supported
18
TheDayBefore (days countdown)
TheDayBefore (days countdown)
TheDayBefore (days countdown)
Anniversary·Widget·Day Counter
Free

Easily manage important dates and countdown to special events with customizable widgets and decorative options. Record memories, share milestones with loved ones, and organize your schedule by category. Never miss a precious moment again.

Customizable D-Day countdownsLock screen and home screen widgetsMultiple calculation methods (days, months, weeks)
🌟 Lifestyle
(1.1K)
free with in-app purchases
19
Days • Countdown & Widgets
Days • Countdown & Widgets
Days • Countdown & Widgets
Countdown, widgets & reminders
Free

Track upcoming special moments with customizable countdowns. Visualize your events with beautiful imagery and access them directly from your home or lock screen. Never forget important dates like birthdays or anniversaries again.

Countdown to eventsCount up from past eventsLock screen widgets
🌟 Lifestyle
(12K)
free with in-app purchases
20
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

FAQ about 66 Days

What are the best 66 days apps & games for iPhone?
66 Days - AI Interview Prep tops our 66 days apps & games ranking as of July 2026, with a 4.9-star average from 228 App Store ratings, and it's free to download.
Yes — 20 of the top 66 days apps & games we rank are free to download, including 66 Days - AI Interview Prep and Life Reset: 66 Day Habit.
66 Days - AI Interview Prep has no ads and offers in-app purchases, according to its App Store listing as of July 2026.
We track 230+ 66 days apps & games on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
This app is an AI-powered platform designed to help candidates prepare for interviews in the banking and consulting sectors. It offers daily structured practice sessions, personalized feedback from an AI coach, and progress tracking over a 66-day period.
Key features include an AI interview coach for feedback, daily drills covering behavioral, technical, and case questions, a 66-day progress heat map, a resume checker, and tools for technical accuracy like Excel and valuation aids.

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