Comparison

The 21 Days Challenge vs Mood Button

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 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.

Highlights
  • 21-day habit challenges
  • Habit tracking
  • Avatar customization
  • Daily journaling
  • Mood tracking
  • Community feed
  • Positive affirmations
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

Mood Button

Features
Read full description

Mood Button is a private voice mood journal for iPhone. Apple MLX runs Qwen3 on device to shape short voice notes into a journal, summary, mood signal, and searchable keywords. No account and no ads. Recording, review, search, and export stay free. One button for quick notes · Hold to record, release to save · Apple Speech is used to turn recordings into text · The day gradually becomes a readable journal draft On-device AI journal shaping · Qwen3 model weights are bundled with the app · Journal generation runs locally on supported physical iPhone devices · Useful for moods, small moments, ideas, tasks, and things you want to find later Calendar, search, and review · Review recent days on a simple calendar · Find small things you mentioned with keyword search · Export local records for backup or personal organization Privacy and optional skins · Recordings, diary text, search terms, and skin preferences stay on this iPhone · Optional weather uses Open-Meteo after Location permission · Hamster Heart is included by default; more home skins are available as a one-time purchase This app is for personal journaling only and does not provide professional advice. It simply helps turn everyday voice notes into a private journal you can revisit.

Screenshots

The 21 Days Challenge4 screens
Mood Button4 screens

Verdict

The call

The clearest difference is ads: Mood Button at none against The 21 Days Challenge's shown. The 21 Days Challenge's advantage is iOS requirement (15.0 vs 17.0). On price, in-app purchases 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

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 and Mood Button sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Scorecard2 real differences · 8 level
The 21 Days Challenge versus Mood Button: the parameters behind the verdict, then further details
ParameterThe 21 Days ChallengeMood Button
PriceFreeFree
Rating4.7 (571 ratings) — better—
Positive reviews91.7% of reviews—
Number of ratings571 — better—
Update frequencyMonthly—
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size127 MB1.1 GB
Age rating4+4+
DeveloperKati Pereira渊博 胡

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

Mood Button

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 Year$24.991 Year
1 purchases

Mood Button

One-time1
  • Unlock Home Skins$1.99

Questions

Is The 21 Days Challenge free?
The 21 Days Challenge is free to download, with in-app purchases available.
Is Mood Button free?
Mood Button is free to download, with in-app purchases available.
Do The 21 Days Challenge or Mood Button have ads?
The 21 Days Challenge shows ads; Mood Button does not.

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