RPN Big Float Calculator vs Multitape Turing Machine
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RPN Big Float Calculator
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.
- 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
Read full descriptionHide full description
Perhaps the most accurate calculator on the iPhone. Precision from 16-bit up to 100.000. Fast Calculation in RPN-Mode or direct formula input. Lots of functions up to elliptic integrals, theta-functions, gamma and log gamma. Built in constants for gamma, pi, Feigenbaum. Calculation mode for complex numbers, quaternions, integers and p-adic numbers. Nerdy functions with Klingon user-Interface.
Multitape Turing Machine
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.
- Turing machine simulation
- Symbol manipulation on tape
- Abstract computation model
- Algorithm understanding
- State and head movement
Read full descriptionHide full description
Multitape Turing Machine Simulator. A Turing machine is a mathematical model of computation describing an abstract machine, that manipulates symbols on a strip of tape according to a table of rules. Despite the model's simplicity, it is capable of implementing any computer algorithm. The machine operates on a memory tape divided into cells, each of which can hold a single symbol drawn from symbols from the alphabet of the machine. It has a "head" that, at any point in the machine's operation, is positioned over one of these cells, and a "state" selected from a set of states. At each step of its operation, the head reads the symbol in its cell. Then, based on the symbol and the machine's own present state, the machine writes a symbol into the same cell, and moves the head one step to the left or the right, or halts the computation. The choice of which replacement symbol to write and which direction to move is based on a table that specifies what to do for each combination of the current state and the symbol that is read. Suggestions: snowlukin@gmail.com
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | RPN Big Float Calculator | Multitape Turing Machine |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 1 |
| Update frequency | Monthly — better | Every 8 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 14.1 — better | 16.0 |
| Further details — not scored | ||
| Size | 14 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Stephan Jancar | Denis Mandych |
Customer experience
RPN Big Float Calculator
Multitape Turing Machine
In-app purchases
RPN Big Float Calculator
No in-app purchases
Multitape Turing Machine
No in-app purchases
Questions
Is RPN Big Float Calculator free?
Is Multitape Turing Machine free?
Which has better reviews, RPN Big Float Calculator or Multitape Turing Machine?
Do RPN Big Float Calculator or Multitape Turing Machine have ads?
Which is updated more often, RPN Big Float Calculator or Multitape Turing Machine?
Other comparisons
