PopGroup Lite vs Zero21 Card Game
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
PopGroup Lite
This game challenges you to pop groups of same-colored bubbles to achieve high scores. Strategic popping is key to forming larger groups and maximizing points. Enjoy a polished experience with customizable settings and online leaderboards.
- Classic 'samegame' puzzle mechanics
- Crystal-clear graphics and animations
- Customizable grid width, height, and colors
- Online high score leaderboards
- No in-app ads or purchases
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PopGroup is a polished version of the classic "samegame" concept invented in 1985 by Kuniaki Moribe. Just pop groups of bubbles that have the same color. Sound easy? It is, unless you want a high score! You have to pop groups in the right order to form bigger groups and get more points. Compare PopGroup to other games based on the same concept: - Crystal-clear graphics - Animations - Customizable width, height, and number of bubble colors - Online high scores - No in-app ads or in-app purchases! PopGroup is made by the developer of tChess (the popular iOS chess app), and Learn Chess (the Apple Staff Favorite e-book).
Zero21 Card Game
This number puzzle game challenges you to keep your score between 0 and 21 by collecting cards. Utilize power-up cards and strategic choices to navigate diverse levels and daily challenges. It's a fun, relaxing way to train your brain.
- Keep score between 0 and 21
- Collect number cards
- Use power-up cards
- Unlock new card collections
- Daily challenges
- Diverse card layouts
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"ZERO21 CARD GAME Zero21 Card Game is a number games with solitaire card. It is fun, relax but helps to train your brain. ***HOW TO PLAY*** The game rule is simple: Try to stay between 0 and 21. - Collect the number card on the board - Choose the right one to keep the sum lower than 21 and greater than 0 - Use the power up cards to help you solve this math game ***FEATURES*** - PICK YOUR STYLE: Many unique stylish card collections for your choice to play to keep things fresh everyday. - AMAZE IN EVERY LEVEL: Diversity card layouts at each level let the game more interesting. - FINISH DAILY CHALLENGE to unlock new card collections. - Golden card keeps your current number at the golden one. - See the next number with forseen card. - Hold button help to keep the card for the next move. - Remove the unused card with Delete button. You should not miss this mathgame because it is TOTALLY FREE and help you BE SMARTER everyday!
Screenshots
Verdict
PopGroup Lite and Zero21 Card Game both sit at 4.0 stars, but that hides the real split: 86% of PopGroup Lite's written reviews are positive against 0% of Zero21 Card Game's. PopGroup Lite also leads on ads (none vs shown) and update cadence (every 25 months vs every 65 months). Zero21 Card Game's advantage is ratings volume (3 vs 1). On price, rating, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.0 for PopGroup Lite against 4.0 for Zero21 Card Game. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews are what separate them: 86% of PopGroup Lite's written reviews are positive against 0% of Zero21 Card Game's.
PopGroup Lite ships an update every 25 months, Zero21 Card Game every 65 months. The most recent releases landed on October 23, 2026 and October 14, 2026 respectively.
| Parameter | PopGroup Lite | Zero21 Card Game |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1 ratings) | 4.0 (3 ratings) |
| Positive reviews | 85.7% of reviews — better | 0.0% of reviews |
| Number of ratings | 1 | 3 — better |
| Update frequency | Every 25 months — better | Every 65 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 1 MB | 58 MB |
| Age rating | 4+ | 4+ |
| Developer | Tom Kerrigan | Le Nhung |
Customer experience
PopGroup Lite
Zero21 Card Game
In-app purchases
PopGroup Lite
No in-app purchases
Zero21 Card Game
No in-app purchases
Questions
Is PopGroup Lite free?
Is Zero21 Card Game free?
Which has better reviews, PopGroup Lite or Zero21 Card Game?
Do PopGroup Lite or Zero21 Card Game have ads?
Which is updated more often, PopGroup Lite or Zero21 Card Game?
Other comparisons
