# Tiamat vs Excel Classes

The clearest difference is update cadence: Tiamat at every 2 weeks against Excel Classes's every 6 months. Excel Classes's advantage is iOS requirement (15.5 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Tiamat sells 3 one-off in-app purchases and Excel Classes sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Tiamat ships an update every 2 weeks, Excel Classes every 6 months. The most recent releases landed on October 14, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Tiamat | Excel Classes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (107 ratings)](https://appshunter.io/ios/app/tiamat-cellular-automata/id1580189385/reviews)** | — |
| Number of ratings | **107** | — |
| Positive reviews | 92.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 6 months |
| Monetization | Free with in-app purchases | — |
| Size | 34 MB | 148 MB |
| Requires iOS | 26.0 | **15.5** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [GEORGY OSTROBROD](https://appshunter.io/developer/1875865758) | [Online Learning](https://appshunter.io/developer/1790866777) |

## What reviewers say

### 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 |


### Excel Classes

[App page](https://appshunter.io/ios/app/excel-classes/id6741476470)

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Package - BA | $39.99 | one-time |
| Package - AY | $39.99 | one-time |
| Package - BD | $39.99 | one-time |
| Package - AW | $39.99 | one-time |
| Package - BB | $39.99 | one-time |
| Package - AZ | $39.99 | one-time |
| Package - BC | $39.99 | one-time |
| Package - BG | $49.99 | one-time |
| Package - BF | $49.99 | one-time |
| Package - BH | $49.99 | one-time |


## Frequently asked questions

### Is Tiamat free?

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

### Is Excel Classes free?

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

### Do Tiamat or Excel Classes have ads?

Neither Tiamat nor Excel Classes shows ads.

### Which is updated more often, Tiamat or Excel Classes?

Tiamat ships an update every 2 weeks, and Excel Classes every 6 months. Most recently, Tiamat was updated on October 14, 2026 and Excel Classes on October 11, 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.*