# SPEEDSim vs Tiamat

The clearest difference is review sentiment: Tiamat at 92% against SPEEDSim's 45%. Tiamat also leads on rating (4.9 vs 2.8) and update cadence (every 2 weeks vs every 4 months). SPEEDSim's advantage is in-app purchases (none vs 6) and iOS requirement (8.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Tiamat sells 3 one-off in-app purchases. SPEEDSim asks for nothing beyond the download.

Tiamat holds the better App Store score, 4.9 against 2.8. That said, the two scores are not equally well evidenced: Tiamat has 117 ratings behind it against 19, so its average is the more settled of the two. Written reviews point the same way: 45% of SPEEDSim's written reviews are positive against 92% of Tiamat's.

SPEEDSim ships an update every 4 months, Tiamat every 2 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | SPEEDSim | Tiamat |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.8 (19 ratings)](https://appshunter.io/ios/app/speedsim-spatial-population-dynamics-simulator/id437545518/reviews) | **[4.9 (117 ratings)](https://appshunter.io/ios/app/tiamat-cellular-automata/id1580189385/reviews)** |
| Number of ratings | 19 | **117** |
| Positive reviews | 45.0% of reviews | **92.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 14 MB | 34 MB |
| Requires iOS | **8.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [David Hiebeler](https://appshunter.io/developer/437545521) | [GEORGY OSTROBROD](https://appshunter.io/developer/1875865758) |

## What reviewers say

### SPEEDSim

[App page](https://appshunter.io/ios/app/speedsim-spatial-population-dynamics-simulator/id437545518)

Explore complex ecological and epidemiological models through interactive simulations. This tool introduces cellular automaton models and allows hands-on manipulation of parameters to visualize spatial dynamics. It's designed for educational outreach and scientific exploration.

**Highlights:** Interactive spatial simulations, Cellular automaton models, Parameter customization, Visualize spatial dynamics, Graph summaries over time, Save images to Photos, Pinch-to-zoom and pan

**Features:** macOS Compatibility

**In-app purchases:** none


### Tiamat

[App page](https://appshunter.io/ios/app/tiamat-cellular-automata/id1580189385)

Explore a cellular automata simulator that allows you to create and customize complex patterns using simple rules. Discover mesmerizing worlds of order and chaos, experiment with transformations, and enjoy a therapeutic experience.

**Highlights:** Create and customize rulesets, Design and save intricate patterns, Transform existing patterns, Adjust simulation speed, Access a library of pre-built patterns, Choose from field presets, Supports BS, SB, and HROT rulestrings

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Developer tip | $1.99 | one-time |
| Developer tip | $4.99 | one-time |
| Developer tip | $6.99 | one-time |


## Frequently asked questions

### Is SPEEDSim free?

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

### Is Tiamat free?

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

### Which has better reviews, SPEEDSim or Tiamat?

Tiamat is rated higher. SPEEDSim averages 2.8 out of 5 from 19 ratings, while Tiamat averages 4.9 from 117 ratings.

### Do SPEEDSim or Tiamat have ads?

Neither SPEEDSim nor Tiamat shows ads.

### Which is updated more often, SPEEDSim or Tiamat?

SPEEDSim ships an update every 4 months, and Tiamat every 2 weeks. Most recently, SPEEDSim was updated on November 1, 2026 and Tiamat on November 3, 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.*