# SPMS vs Turtle Universe

The clearest difference is update cadence: Turtle Universe at every 6 weeks against SPMS's every 11 months. SPMS's advantage is iOS requirement (8.1 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

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

SPMS ships an update every 11 months, Turtle Universe every 6 weeks. The most recent releases landed on September 28, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | SPMS | Turtle Universe |
| --- | --- | --- |
| 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 11 months | **Every 6 weeks** |
| Monetization | — | Free |
| Size | 51 MB | 120 MB |
| Requires iOS | **8.1** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Advantech Co., Ltd.](https://appshunter.io/developer/413213069) | [Turtle Sim LLC](https://appshunter.io/developer/1568741108) |

## What reviewers say

### SPMS

[App page](https://appshunter.io/ios/app/spms/id1278902005)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is SPMS free?

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

### Is Turtle Universe free?

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

### Do SPMS or Turtle Universe have ads?

Neither SPMS nor Turtle Universe shows ads.

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

SPMS ships an update every 11 months, and Turtle Universe every 6 weeks. Most recently, SPMS was updated on September 28, 2026 and Turtle Universe on October 2, 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.*