Comparison

The 21 Days Challenge vs SN3

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

Head to head
About

The 21 Days Challenge

Build life-changing habits with guided 21-day challenges. Track progress, journal your thoughts, and customize your avatar with earned points. Improve your mental well-being and create a happier lifestyle.

Highlights
  • Guided 21-day habit challenges
  • Daily journaling and mood tracking
  • Avatar customization with earned points
  • Community feed for gratitude sharing
  • Positive affirmations and wallpapers
  • Daily task completion tracking
  • Customizable daily reminders
Features
Read full description

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/

About

SN3

Features
Read full description

سنع سنع هو تطبيق متكامل لأسلوب حياة سهل، صُمّم عشان يسهّل حياتك اليومية ويجمع لك كل اللي تحتاجه في مكان واحد. من التجميل والعناية والصحة واللياقة البدنية إلى الخياطة وغيرها من الخدمات اليومية، اكتشف نخبة من المحترفين الموثوقين، تصفّح المواعيد المتاحة، واحجز بكل سهولة، وأدر جميع حجوزاتك من تطبيق واحد. سنع بيسنعك تطبيق سعودي بكل فخر SN3 is your all-in-one lifestyle app, designed to make everyday life easier by bringing everything you need together in one place. From beauty and wellness to health, fitness, tailoring, and more, discover a wide range of everyday services, connect with trusted professionals, explore availability, book effortlessly, and manage all your appointments in one seamless app. SN3 — Making Everyday Life Easier. Proudly Saudi

Screenshots

The 21 Days Challenge4 screens
SN34 screens

Verdict

The call

The clearest difference is in-app purchases: SN3 at none against The 21 Days Challenge's 2. SN3 also leads on ads (none vs shown) and update cadence (every 9 days vs every 4 weeks). The 21 Days Challenge's advantage is device support (3 vs 1). On price 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. The 21 Days Challenge sells 2 in-app purchases, starting at $2.99 per month. SN3 asks for nothing beyond the download.

UpkeepUpdate frequency

The 21 Days Challenge ships an update every 4 weeks, SN3 every 9 days. The most recent releases landed on November 7, 2026 and November 4, 2026 respectively.

Scorecard4 real differences · 6 level
The 21 Days Challenge versus SN3: the parameters behind the verdict, then further details
ParameterThe 21 Days ChallengeSN3
PriceFreeFree
Rating4.7 (575 ratings) — better—
Positive reviews92.1% of reviews—
Number of ratings575 — better—
Update frequencyEvery 4 weeksEvery 9 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better16.0
Further details — not scored
Size128 MB48 MB
Age rating4+4+
DeveloperKati PereiraALIF Solutions DMCC

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

SN3

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

The 21 Days Challenge

Subscriptions2
  • Remove ads month$2.991 Month
  • Remove Ads Year3 Days trial$24.991 Year
None

SN3

No in-app purchases

Questions

Is The 21 Days Challenge free?
The 21 Days Challenge is free to download, with in-app purchases available.
Is SN3 free?
SN3 is free to download, with no in-app purchases.
Do The 21 Days Challenge or SN3 have ads?
The 21 Days Challenge shows ads; SN3 does not.
Which is updated more often, The 21 Days Challenge or SN3?
The 21 Days Challenge ships an update every 4 weeks, and SN3 every 9 days. Most recently, The 21 Days Challenge was updated on November 7, 2026 and SN3 on November 4, 2026.

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