# RPN Big Float Calculator vs Multitape Turing Machine

RPN Big Float Calculator and Multitape Turing Machine both sit at 5.0 stars, but that hides the real split: 100% of Multitape Turing Machine's written reviews are positive against 50% of RPN Big Float Calculator's. RPN Big Float Calculator's advantage is update cadence (monthly vs every 8 months) and device support (4 vs 2). On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for RPN Big Float Calculator against 5.0 for Multitape Turing Machine. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews are what separate them: 50% of RPN Big Float Calculator's written reviews are positive against 100% of Multitape Turing Machine's.

RPN Big Float Calculator ships an update monthly, Multitape Turing Machine every 8 months. The most recent releases landed on November 4, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | RPN Big Float Calculator | Multitape Turing Machine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/rpn-big-float-calculator/id1312613680/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/multitape-turing-machine/id6443568065/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 8 months |
| Monetization | Free | Free |
| Size | 14 MB | 2 MB |
| Requires iOS | **14.1** | 16.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Stephan Jancar](https://appshunter.io/developer/1107422127) | [Denis Mandych](https://appshunter.io/developer/1647227152) |

## What reviewers say

### RPN Big Float Calculator

[App page](https://appshunter.io/ios/app/rpn-big-float-calculator/id1312613680)

This advanced calculator offers unparalleled precision for complex mathematical operations, supporting up to 100,000 digits. It features both RPN mode and direct formula input, with a vast array of functions and built-in constants. Explore calculations with complex numbers, quaternions, and p-adic numbers.

**Highlights:** High precision up to 100,000 digits, RPN and direct formula input modes, Complex number and quaternion calculations, Elliptic integrals and theta-functions, Built-in mathematical constants, P-adic number calculations

**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 RPN Big Float Calculator free?

RPN Big Float Calculator 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.

### Which has better reviews, RPN Big Float Calculator or Multitape Turing Machine?

RPN Big Float Calculator and Multitape Turing Machine are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do RPN Big Float Calculator or Multitape Turing Machine have ads?

Neither RPN Big Float Calculator nor Multitape Turing Machine shows ads.

### Which is updated more often, RPN Big Float Calculator or Multitape Turing Machine?

RPN Big Float Calculator ships an update monthly, and Multitape Turing Machine every 8 months. Most recently, RPN Big Float Calculator was updated on November 4, 2026 and Multitape Turing Machine 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.*