NumJam vs Concentration Game
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
NumJam
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Increase or decrease the number of blocks to make the game smoother Digital elimination, get high scores Interesting sound effects This is a different creative gameplay, with props bombs to help you clean up quickly. Number Jam is for whole family and friends. Make Out the High Scores and enjoy the game for free from Oneiric Gaming.
Concentration Game
A classic single-player card game where you match pairs of numbers. The challenge increases with a decreasing time limit as you advance through levels. Enjoy a brain-training experience with this solo card game.
- Single-player card game
- Match numbered pairs
- Time limit decreases with level
- Brain training
- Classic card game mechanics
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It is a classic card game. For one person. Match pairs of the same numbers. The time limit decreases as the level goes up. You can obtain and collect images by clearing levels.
Screenshots
Verdict
The clearest difference is update cadence: NumJam at every 6 days against Concentration Game's every 5 months. On price, ads, 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.
NumJam ships an update every 6 days, Concentration Game every 5 months. The most recent releases landed on May 16, 2026 and September 21, 2026 respectively.
| Parameter | NumJam | Concentration Game |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.6 (14 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 14 — better |
| Update frequency | Every 6 days — better | Every 5 months |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | — | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 98 MB | 103 MB |
| Age rating | 4+ | 4+ |
| Developer | Oneiric Gaming Private Limited | Hirokazu Uno |
In-app purchases
NumJam
No in-app purchases
Concentration Game
No in-app purchases
Questions
Is NumJam free?
Is Concentration Game free?
Do NumJam or Concentration Game have ads?
Which is updated more often, NumJam or Concentration Game?
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