# NumWorlds vs Grid Genius

The clearest difference is update cadence: Grid Genius at weekly against NumWorlds's every 2 weeks. NumWorlds's advantage is iOS requirement (15.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. NumWorlds sells 10 one-off in-app purchases and Grid Genius sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

NumWorlds ships an update every 2 weeks, Grid Genius weekly. The most recent releases landed on September 30, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | NumWorlds | Grid Genius |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 511 MB | 9 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Black Pug Studio Ltd.](https://appshunter.io/developer/1753266832) | [Maradlo s.r.o.](https://appshunter.io/developer/1589523109) |

## What reviewers say

### NumWorlds

[App page](https://appshunter.io/ios/app/numworlds/id6736342660)

Embark on a puzzle adventure connecting numbers to reach targets and unlock stunning 3D worlds. Explore diverse biomes, master addictive challenges, and sharpen your mind with this engaging experience.

**Highlights:** Stunning 3D biomes, Addictive number chaining puzzles, Hundreds of levels, Offline play, Mind-sharpening challenges, Cosmetic customization

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Common Skin | $0.99 | one-time |
| 20 Blockoins | $0.99 | one-time |
| Rare Skin | $1.99 | one-time |
| New Biome | $1.99 | one-time |
| 55 Blockoins | $1.99 | one-time |
| Epic Skin | $3.99 | one-time |
| 170 Blockoins | $6.99 | one-time |
| 345 Blockoins | $12.99 | one-time |
| 600 Blockoins | $22.99 | one-time |
| 1400 Blockoins | $44.99 | one-time |


### Grid Genius

[App page](https://appshunter.io/ios/app/grid-genius/id6736571131)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 Diamonds | $0.99 | one-time |
| 250 Diamonds | $1.99 | one-time |
| 500 Diamonds | $3.99 | one-time |
| 1000 Diamonds | $7.99 | one-time |


## Frequently asked questions

### Is NumWorlds free?

NumWorlds is free to download, with in-app purchases available.

### Is Grid Genius free?

Grid Genius is free to download, with in-app purchases available.

### Do NumWorlds or Grid Genius have ads?

Neither NumWorlds nor Grid Genius shows ads.

### Which is updated more often, NumWorlds or Grid Genius?

NumWorlds ships an update every 2 weeks, and Grid Genius weekly. Most recently, NumWorlds was updated on September 30, 2026 and Grid Genius on September 18, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*