Zero21 Card Game vs Train Out
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
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!
Train Out
Guide trains of matching colors through a grid to pick up passengers. Once full, the train can exit through its tunnel. Plan your moves carefully to solve increasingly complex puzzles.
- Color-matching puzzles
- Train pathfinding
- Passenger pickup
- Grid-based strategy
- Increasing difficulty
- Tunnel escape
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Train Out is a clever and colorful puzzle game where you guide trains through a grid to pick up passengers of the same color. Once a train is full, the matching barrier opens, allowing the train to escape through its tunnel. Drag each train across the grid carefully, avoid getting stuck, and plan your moves wisely. As levels progress, the layouts become more challenging, requiring sharper thinking and smarter strategies.
Screenshots
Verdict
The clearest difference is rating: Train Out at 4.8 against Zero21 Card Game's 4.0. Train Out also leads on update cadence (every 11 days vs every 65 months) and ratings volume (20 vs 3). On price, ads, in-app purchases and monetization model 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.
Train Out holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Train Out has 20 ratings behind it against 3, so its average is the more settled of the two.
Zero21 Card Game ships an update every 65 months, Train Out every 11 days. The most recent releases landed on October 14, 2026 and October 10, 2026 respectively.
| Parameter | Zero21 Card Game | Train Out |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (3 ratings) | 4.8 (20 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 3 | 20 — better |
| Update frequency | Every 65 months | Every 11 days — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 58 MB | 126 MB |
| Age rating | 4+ | 9+ |
| Developer | Le Nhung | Samet Ersan |
Customer experience
Zero21 Card Game
Train Out
In-app purchases
Zero21 Card Game
No in-app purchases
Train Out
No in-app purchases
Questions
Is Zero21 Card Game free?
Is Train Out free?
Which has better reviews, Zero21 Card Game or Train Out?
Do Zero21 Card Game or Train Out have ads?
Which is updated more often, Zero21 Card Game or Train Out?
Other comparisons
