# Alfredo Backer vs Multitape Turing Machine

Alfredo Backer and Multitape Turing Machine 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.

Both ship on a similar rhythm, roughly every 8 months. The most recent releases landed on September 18, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Alfredo Backer | Multitape Turing Machine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/multitape-turing-machine/id6443568065/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | Every 8 months |
| Monetization | — | Free |
| Size | 55 MB | 2 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Externato Alfredo Backer Ltda](https://appshunter.io/developer/1535072495) | [Denis Mandych](https://appshunter.io/developer/1647227152) |

## What reviewers say

### Alfredo Backer

[App page](https://appshunter.io/ios/app/alfredo-backer/id1212354980)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Multitape Turing Machine

[App page](https://appshunter.io/ios/app/multitape-turing-machine/id6443568065)

This app simulates a mathematical model of computation, allowing users to explore how abstract machines manipulate symbols on a tape according to defined rules. It's a tool for understanding the fundamental principles of computer algorithms.

**Highlights:** Turing machine simulation, Symbol manipulation on tape, Abstract computation model, Algorithm understanding, State and head movement

**In-app purchases:** none


## Frequently asked questions

### Is Alfredo Backer free?

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

### Is Multitape Turing Machine free?

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

### Do Alfredo Backer or Multitape Turing Machine have ads?

Neither Alfredo Backer nor Multitape Turing Machine shows ads.

### Which is updated more often, Alfredo Backer or Multitape Turing Machine?

Alfredo Backer ships an update every 8 months, and Multitape Turing Machine every 8 months. Most recently, Alfredo Backer was updated on September 18, 2026 and Multitape Turing Machine on June 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.*