Easlo Experiments vs 66 Challenge
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Easlo Experiments
This app encourages an experimenter mindset for personal growth. Track new habits, routines, or products for a set duration, logging progress and observations. Review your trials to decide if they fit your life.
- Set custom experiment frequency and duration
- Log progress with notes and photos
- Home screen widgets for mindfulness
- Assign reminders for experiments
- Review and reflect on experiment outcomes
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What if there’s a better way than blindly committing to goals and habits just because they’re recommended to us? By adopting the experimenter mindset, you can try new habits, routines, or products for a set number of days and see what actually works for you. Experiments helps you track these personal trials, letting you check in on your progress and log observations through notes or photos. At the end of your chosen duration, you can review and reflect on whether you want to continue with it. Key Features: · Set your own frequency and duration for each experiment. · Check in on your experiment and attach notes or photos. · Add home screen widgets to stay mindful of your ongoing experiments. · Assign reminders to your experiments for timely nudges. Experiment. Reflect. Repeat.
66 Challenge
Build lasting habits with a science-backed system designed to guide you through a 66-day journey. Track daily progress, visualize your transformation, and stay motivated with social features and achievements. Transform your life one habit at a time.
- Daily habit tracking
- Progress visualization
- Streak protection
- Social feed and squads
- Customizable reminders
- Achievement badges
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Transform your life one habit at a time with 66 Challenge - the science-backed app that helps you build lasting habits in just 66 days. WHY 66 DAYS? Research shows it takes an average of 66 days to form a new habit. We've built the perfect system to guide you through every single day. KEY FEATURES: - Daily Habit Tracking - Mark your habits complete each day and watch your streak grow - Progress Visualization - See your 66-day journey unfold with beautiful progress tracking - Streak Protection - Stay motivated with streak counts and milestone celebrations - Progress Photos - Capture your transformation with optional daily photos - Friends & Social Feed - Follow friends, celebrate their wins, and stay accountable together - Squads - Join or create groups to challenge habits together - Achievements - Unlock badges as you hit milestones on your journey - Reminders - Never miss a day with customizable notifications BECOME UNDENIABLE Whether you want to exercise daily, read more, meditate, or build any positive habit - 66 Challenge gives you the structure, motivation, and community to make it stick. Start your 66-day transformation today. --- Terms of Use: https://spiffy-muskmelon-f8f.notion.site/Terms-of-Service-66-Challenge-2f456f682ccc8026ac42f9567c526f57 Privacy Policy: https://spiffy-muskmelon-f8f.notion.site/Privacy-Policy-66-Challenge-1e956f682ccc80f18d6ad0a347d8707f
Screenshots
Verdict
The clearest difference is rating: 66 Challenge at 5.0 against Easlo Experiments's 4.6. 66 Challenge also leads on update cadence (every 5 days vs every 3 weeks) and iOS requirement (13.0 vs 17.0). Easlo Experiments's advantage is ratings volume (22 vs 5). On price, ads, in-app purchases and monetization model 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
Both are free to download. Easlo Experiments sells 1 one-off in-app purchase and 66 Challenge sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
66 Challenge holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 22 and 5 respectively.
Easlo Experiments ships an update every 3 weeks, 66 Challenge every 5 days. The most recent releases landed on September 11, 2026 and September 4, 2026 respectively.
| Parameter | Easlo Experiments | 66 Challenge |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (22 ratings) | 5.0 (5 ratings) — better |
| Positive reviews | 89.7% of reviews | — |
| Number of ratings | 22 — better | 5 |
| Update frequency | Every 3 weeks | Every 5 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 17.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 18 MB |
| Age rating | 4+ | 12+ |
| Developer | Easlo Pte. Ltd. | Moad Ghajjate El Fal |
Customer experience
Easlo Experiments
66 Challenge
In-app purchases
Easlo Experiments
- Experiments Pro$9.99
66 Challenge
- Pro Monthly7 Days trial$3.991 Month
- Pro Annual7 Days trial$29.991 Year
- Pro Lifetime$59.99
Questions
Is Easlo Experiments free?
Is 66 Challenge free?
Which has better reviews, Easlo Experiments or 66 Challenge?
Do Easlo Experiments or 66 Challenge have ads?
Which is updated more often, Easlo Experiments or 66 Challenge?
Other comparisons
