The 21 Days Challenge vs Ozee
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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/
Ozee
This app connects women with qualified beauty and spa specialists for in-home services. It aims to provide professional, specialized, and safe wellness experiences.
- In-home beauty services
- Spa treatments
- Qualified specialists
- Professional and safe experience
- General well-being services
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Ozee Salon & Spa provides beauty and general well-being services for women in the comfort of their homes in a professional, specialized, safe and modern way through a team of highly qualified beauty and spa specialists.
Screenshots
Verdict
The 21 Days Challenge and Ozee both sit at 4.7 stars, but that hides the real split: 92% of The 21 Days Challenge's written reviews are positive against 13% of Ozee's. Ozee's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price, rating, ratings volume 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. Ozee asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.7 for The 21 Days Challenge against 4.6 for Ozee. Both are backed by a comparable volume of ratings — 575 and 637 respectively. Written reviews are what separate them: 92% of The 21 Days Challenge's written reviews are positive against 13% of Ozee's.
The 21 Days Challenge ships an update every 4 weeks, Ozee every 2 weeks. The most recent releases landed on November 7, 2026 and November 5, 2026 respectively.
| Parameter | The 21 Days Challenge | Ozee |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (575 ratings) — better | 4.6 (637 ratings) |
| Positive reviews | 92.1% of reviews — better | 12.5% of reviews |
| Number of ratings | 575 | 637 — better |
| Update frequency | Every 4 weeks | Every 2 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 128 MB | 101 MB |
| Age rating | 4+ | 4+ |
| Developer | Kati Pereira | Ozee LTD. |
Customer experience
The 21 Days Challenge
Ozee
User reviews
The 21 Days Challenge
From 575 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
Ozee
From 637 App Store ratingsWhat we love
- 👩💼 Professional and skilled staff members
- ✨ High-quality service results
- ⏰ Respectful of appointment times (when service is delivered)
- 💆 Relaxing and satisfying massage experience
Room to improve
- ⏱️ Chronic delays of 30 minutes to 2+ hours
- 📱 Unresponsive customer service
- 💳 Unfair refund policies with unexplained deductions
- 🚫 Failure to show up for appointments
- 💰 Overpriced services
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
Ozee
Reported bugs
4 issues- App update erased existing gift credits without recovery option
- Unexplained wallet balance deductions
- Appointment scheduling system overbooks technicians
- Customer service response system is slow and ineffective
Requested features
6 requests- Real-time appointment status tracking
- Direct phone support in addition to app messaging
- Automatic refunds to bank accounts instead of wallet credits
- Transparent pricing breakdown
- Improved appointment scheduling system with better capacity management
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- Data backup and recovery system for app updates
In-app purchases
The 21 Days Challenge
- Remove ads month$2.991 Month
- Remove Ads Year3 Days trial$24.991 Year
Ozee
No in-app purchases
