# Turtle Universe vs GROB

Turtle Universe and GROB are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Turtle Universe ships an update every 6 weeks, GROB every 2 months. The most recent releases landed on July 29, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Turtle Universe | GROB |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (45 ratings)](https://appshunter.io/ios/app/turtle-universe/id1455235317/reviews)** | — |
| Number of ratings | **45** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Free | — |
| Size | 120 MB | 320 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Turtle Sim LLC](https://appshunter.io/developer/1568741108) | [Shantou Jinbida Technology Co., Ltd](https://appshunter.io/developer/1801128506) |

## What reviewers say

### Turtle Universe

[App page](https://appshunter.io/ios/app/turtle-universe/id1455235317)

Explore and learn about scientific phenomena through interactive microworlds. Create your own simulations using text or blocks, and engage with a global community of young learners. Discover over 100 scientific models and create computational art and games.

**Highlights:** Explore 100+ scientific models, Create custom microworlds, Code with text or blocks, Investigate phenomena, Engage in global discussions, Create computational art and games

**Features:** macOS Compatibility

**In-app purchases:** none


### GROB

[App page](https://appshunter.io/ios/app/grob/id6743071286)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Turtle Universe free?

Turtle Universe is free to download, with no in-app purchases.

### Is GROB free?

GROB is free to download, with no in-app purchases.

### Do Turtle Universe or GROB have ads?

Neither Turtle Universe nor GROB shows ads.

### Which is updated more often, Turtle Universe or GROB?

Turtle Universe ships an update every 6 weeks, and GROB every 2 months. Most recently, Turtle Universe was updated on July 29, 2026 and GROB on September 9, 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.*