Comparison

90 Day Challenge vs Day Left

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

90 Day Challenge

Build lasting habits with a personalized 90-day program tailored to your lifestyle and goals. This offline-first app offers custom tasks for sleep, water, exercise, and more, with progressive challenges and visual progress tracking.

Highlights
  • Personalized 90-day habit program
  • Customized daily tasks
  • Progressive difficulty
  • Offline functionality
  • Visual progress tracking
  • Focus on sleep, water, exercise, and screen time
Read full description

Science shows it takes 90 days to form lasting habits. Resettr harnesses this research to deliver a personalized habit-building program designed specifically for your lifestyle and goals. No more generic advice or one-size-fits-all solutions – just a tailored 90-day journey to the life you want. YOUR PERSONALIZED LIFE RESET Answer a few questions about your current habits and select your primary goal. Our intelligent algorithm instantly creates your custom 90-day program targeting key areas: Sleep, Water, Exercise, Mind, Screen Time, and more. Each task is specifically chosen to help you progress steadily toward meaningful change. WORKS ANYWHERE, ANYTIME Unlike other habit apps that require constant internet connectivity, Resettr works completely offline after subscription. Perfect for travel, remote areas, or simply saving your data. Your entire program is stored locally on your device for seamless access whenever you need it. KEY FEATURES • Personalized 90-Day Program: Tailored daily tasks based on your questionnaire responses • Progressive Challenge: Task difficulty increases gradually as your habits strengthen • Progress Tracking: Monitor your journey with visual progress indicators • Complete Offline Access: Full functionality without internet after subscription WHY 90 DAYS? Research found that it takes an average of 90 days for a new behavior to become automatic. Resettr is built on this science, providing the perfect timeframe to transform occasional actions into lifelong habits. AREAS OF IMPROVEMENT: • Sleep quality and routines • Hydration habits • Exercise consistency • Mental wellness practices • Screen time management • Personal hygiene • And more! Start your transformation today with Resettr. Small, consistent changes lead to remarkable results – and your new life is just 90 days away. Privacy First: • 100% offline - all data stays on your device • No account needed • No cloud sync • Your data is yours only. SUBSCRIPTION INFORMATION Full access to all features is only available in the Resettr paid subscription plan (Monthly/Yearly) When you purchase a subscription, please be aware of the following: - Payment will be charged to Apple Account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period - Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's App Store Account Settings after purchase Terms of service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: https://doc-hosting.flycricket.io/resettr-privacy-policy/0980682e-a5f9-4959-9ce7-966ea9f352fa/privacy

About

Day Left

Features
Read full description

Day Left is a life countdown and digital detox app designed to make time feel real again. Most people do not lose their day in one big decision. They lose it in small moments: a few minutes of scrolling after waking up, a short video during work, another social media check before sleep. Day Left helps you see those moments clearly. Use Day Left to estimate how much time you have left, reflect on your screen time habits, and take back small blocks of your day through simple digital detox sessions. Key features: • Life countdown: see your estimated days, weeks, and years remaining. • Life progress: visualize how much of your life has already passed. • Screen time reflection: understand how phone usage and social media habits affect your day. • Digital detox sessions: take back 15, 20, or 30 minutes without mindless scrolling. • Daily progress: see how much time you still need to reclaim today. • Widgets: keep your life countdown and daily reminder visible without opening the app. • Habit projection: compare your current routine with a better version of your day. Day Left is not built to scare you. It is built to remind you that your time is limited, your attention is valuable, and each day can be used better. If you feel that social media, endless scrolling, or phone addiction is taking too much of your life, Day Left gives you a simple place to start. Reduce screen time. Stop wasting your days. Make every day count.

Screenshots

90 Day Challenge3 screens
Day Left4 screens

Verdict

The call

The clearest difference is in-app purchases: Day Left at none against 90 Day Challenge's 5. Day Left also leads on update cadence (every 8 days vs monthly). 90 Day Challenge's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. 90 Day Challenge sells 5 in-app purchases, starting at $1.99 per month. Day Left asks for nothing beyond the download.

UpkeepUpdate frequency

90 Day Challenge ships an update monthly, Day Left every 8 days. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.

Scorecard3 real differences · 6 level
90 Day Challenge versus Day Left: the parameters behind the verdict, then further details
Parameter90 Day ChallengeDay Left
PriceFreeFree
Rating4.8 (16 ratings) — better—
Number of ratings16 — better—
Update frequencyMonthlyEvery 8 days — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.115.1
Further details — not scored
Size87 MB29 MB
Age rating4+12+
DeveloperJohn Kevin BascoTran Dung

In-app purchases

5 purchases

90 Day Challenge

Subscriptions5
  • monthly$1.991 Month
  • Yearly - Bonus$4.491 Year
  • Monthly Pro$7.991 Month
Show 2 more
  • yearly$14.991 Year
  • Yearly Pro$29.991 Year
None

Day Left

No in-app purchases

Questions

Is 90 Day Challenge free?
90 Day Challenge is free to download, with in-app purchases available.
Is Day Left free?
Day Left is free to download, with no in-app purchases.
Do 90 Day Challenge or Day Left have ads?
Day Left shows ads; 90 Day Challenge does not.
Which is updated more often, 90 Day Challenge or Day Left?
90 Day Challenge ships an update monthly, and Day Left every 8 days. Most recently, 90 Day Challenge was updated on November 4, 2026 and Day Left on November 5, 2026.

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