# iAltair vs Turing Machine

The clearest difference is update cadence: Turing Machine at every 5 days against iAltair's every 11 months. Turing Machine also leads on rating (5.0 vs 4.8). iAltair's advantage is ratings volume (21 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Turing Machine holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: iAltair has 21 ratings behind it against 2, so its average is the more settled of the two.

iAltair ships an update every 11 months, Turing Machine every 5 days. The most recent releases landed on October 13, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | iAltair | Turing Machine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (21 ratings)](https://appshunter.io/ios/app/ialtair/id291182085/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/turing-machine-simulator/id1608855567/reviews)** |
| Number of ratings | **21** | 2 |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 5 days** |
| Monetization | Free | Free |
| Size | 10 MB | 1 MB |
| Requires iOS | 15.4 | **15.2** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Peter Schorn](https://appshunter.io/developer/291182088) | [Rustam Khakhuk](https://appshunter.io/developer/1586606475) |

## What reviewers say

### iAltair

[App page](https://appshunter.io/ios/app/ialtair/id291182085)

Experience vintage computing with a simulation of the MITS Altair 8800. Explore old software like CP/M 2 and run programs such as Eliza using built-in BASIC. This self-contained system offers a unique glimpse into early computing history.

**Highlights:** MITS Altair 8800 simulation, CP/M 2 operating system support, Built-in BASIC interpreter, Run Eliza program, Self-contained system

**In-app purchases:** none


### Turing Machine

[App page](https://appshunter.io/ios/app/turing-machine-simulator/id1608855567)

This application allows users to write and execute algorithms on a Turing machine. It is designed to help engineering students in higher education practice and verify their work with algorithms.

**Highlights:** Write algorithms, Execute algorithms, Verify algorithm work, Turing machine simulation, Educational tool for engineering students

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iAltair free?

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

### Is Turing Machine free?

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

### Which has better reviews, iAltair or Turing Machine?

Turing Machine is rated higher. iAltair averages 4.8 out of 5 from 21 ratings, while Turing Machine averages 5.0 from 2 ratings.

### Do iAltair or Turing Machine have ads?

Neither iAltair nor Turing Machine shows ads.

### Which is updated more often, iAltair or Turing Machine?

iAltair ships an update every 11 months, and Turing Machine every 5 days. Most recently, iAltair was updated on October 13, 2026 and Turing Machine on October 1, 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.*