The 21 Days Challenge vs FutureMe
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
The 21 Days Challenge
Build lasting habits and transform your life over 21 days with guided challenges. Track your progress, journal your thoughts, and customize your avatar with earned points. Discover new routines for health, productivity, and happiness.
- 21-day habit challenges
- Habit tracking
- Avatar customization
- Daily journaling
- Mood tracking
- Community feed
- Positive affirmations
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Create your ideal life with life changing habits. It is estimated that it takes people 21 days to form a new habit. So it’s a perfect amount of time to change or introduce something new in your life. Choose the best challenge for you and do it for 21 days and you’re going to see how the habit becomes part of your lifestyle day by day. Starting a healthy lifestyle, taking a break away from the internet, practicing gratitude, trying to be more productive, simple practices to find happiness and calm in your life, how to study effectively for all the students, ways to spread kindness and positivity, tips for fixing your sleeping schedule and daily positive affirmations are some of the challenges that you can find in the app. Once you complete your daily task, you can mark as completed and collect the points (to customize your avatar). This way, you can use this app like a habit tracker. In the gratitude challenge, you can write your thoughts and share them in the feed (you can leave anonymously too). Here you're going to see all the community answers and you can also give it a like on your favorite ones. Complete tasks on your profile and do daily challenges to collect points so you can buy items for your own avatar like different hairstyles, eyes and mouth shapes and clothes. Create a healthier and happier mind with journaling. With this app you can daily journal and choose your daily mood. Then you can track your mood in the calendar and see all your previous records. You also a have a selection of positive wallpapers for your phone. Enable notifications and choose the time to be notified to remind you to do the challenge every day. Don’t forget to take care of your body and mind. It's the only place you have to live. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
FutureMe
Write and send letters to yourself or others, scheduled for delivery years in the future. Track personal goals, send motivational messages, or reflect on your past. Enrich your messages with photos and videos for a more personal touch.
- Write letters to future self
- Schedule future delivery dates
- Send letters to friends and family
- Enrich letters with photos and videos
- Delivery day notifications
- Edit letters after sending
- Follow public letters
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Dear FutureMe... Ever wished you could write a letter to your future self? Now you can! Check in on your progress toward those big life goals a year from now. Send yourself an awesome pep talk … in 1, 5 or 10 years’ time. Or remind yourself where you’ve come from, and how much those roots matter, at your next birthday. The FutureMe app lets you write, schedule and send letters to yourself, friends, and family members in the future — and be sure they’re delivered on time, too! It takes the futureme.org experience already loved by 8 million+ people and amps it up: • Quick Google, Apple or email sign-in. • Choose a delivery date or occasion or let us surprise you! • Never miss a letter with delivery-day notifications. • Set reminders to write future letters to family, friends, or yourself. • Edit letters for up to 2 days after you send them. • Follow public letters, so you can catch their epilogues. • Get great ideas for writing letters worth reading. • Enrich your letters with photos and videos. • Relive the love: look back over delivered letters whenever you need a boost. • Send unlimited letters with a Premium upgrade. https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is review sentiment: The 21 Days Challenge at 92% against FutureMe's 28%. The 21 Days Challenge also leads on rating (4.7 vs 2.7) and ratings volume (571 vs 137). FutureMe's advantage is ads (none vs shown) and update cadence (every 9 days vs monthly). On price, in-app purchases, monetization model and device support 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. The 21 Days Challenge sells 2 in-app purchases, starting at $2.99 per month and FutureMe sells 11 in-app purchases, starting at $9.00 per year. Whichever you choose, the download price is not the number that matters.
The 21 Days Challenge holds the better App Store score, 4.7 against 2.7. Both are backed by a comparable volume of ratings — 571 and 137 respectively. Written reviews point the same way: 92% of The 21 Days Challenge's written reviews are positive against 28% of FutureMe's.
The 21 Days Challenge ships an update monthly, FutureMe every 9 days. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.
| Parameter | The 21 Days Challenge | FutureMe |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (571 ratings) — better | 2.7 (137 ratings) |
| Positive reviews | 91.7% of reviews — better | 27.7% of reviews |
| Number of ratings | 571 — better | 137 |
| Update frequency | Monthly | Every 9 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 127 MB | 17 MB |
| Age rating | 4+ | 12+ |
| Developer | Kati Pereira | Memories Group Pty Ltd |
Customer experience
The 21 Days Challenge
FutureMe
User reviews
The 21 Days Challenge
From 571 App Store ratingsWhat we love
- 🚀 Simple and motivating
- 👍 Clean design and clear progress tracking
- 🤗 Genuinely helpful and enjoyable to use
- 💫 Positive impact on mental health and habits
- 🌟 Inspirational and encouraging messages
Room to improve
- 🔍 Lack of search option in community challenges
- 🔀 Challenges disappear after creation, no way to find them
- 🤖 Too many ads interrupting the experience
- 🎨 App could use more customization options
FutureMe
From 137 App Store ratingsWhat we love
- 💡 Great concept for self-reflection
- 💌 Long-time user loyalty
- 💖 Wholesome and emotional connection
- ✍️ Easy to use interface (historically)
- ✨ Keepsake for memories
Room to improve
- 💸 Paywall for sending letters
- 😭 Loss of free functionality
- 📱 App now a web wrapper
- 😠 Ads everywhere
- 💔 Disappointment with recent changes
Bugs and requests
The 21 Days Challenge
Reported bugs
2 issues- Sharing created challenges does not work as expected
- Challenges sometimes disappear from the app
Requested features
4 requests- Add a search function for community challenges
- Allow users to save and revisit their own created challenges
- Provide more customization options for the app and user profile
- Introduce a widget for easier access to daily tasks
FutureMe
Reported bugs
15 issues- Cannot exit paywall screen
- App crashes when changing delivery date
- App freezes/crashes frequently
- Login issues between web and app
- Letters not sending/delivering
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- App functions as a web browser
- Ads are overwhelming/unremovable
- Cannot go back to letter after sending
- No draft saving
- App is slow/unresponsive
- Notifications not working
- Date selection glitches
- Typing too much makes text unreadable
- Deleted lengthy letters
- App crashes when trying to send letters
Requested features
10 requests- Revert to old UI/app design
- Allow voluntary contributions
- Add a drafts section
- Improve date selection for delivery
- Allow changing delivery date of existing letters
Show 5 moreShow fewer
- Implement push notifications without email
- Fix date display for started letters
- Allow replies on letters
- Make subscription pricing consistent
- Offer a one-time donation option
In-app purchases
The 21 Days Challenge
- Remove ads month$2.991 Month
- Remove Ads Year$24.991 Year
FutureMe
- Premium$9.001 Year
- Basic$12.001 Year
- A La Carte$1.00
- 1 Year Premium Membership$2.99
- 1 Year Premium Membership$4.99
Show 6 moreShow fewer
- 1 Year Premium Membership$9.99
- 1 Year Premium Membership$24.99
- 5 Year Premium Membership$24.99
- 10 Year Premium Membership$49.99
- Lifetime Premium Membership$99.99
- Lifetime Membership$119.00









