# Desmos Test Mode vs Permutation and Combination

The clearest difference is rating: Permutation and Combination at 4.1 against Desmos Test Mode's 1.6. Permutation and Combination also leads on review sentiment (44% vs 17%) and iOS requirement (12.1 vs 16.0). Desmos Test Mode's advantage is update cadence (every 4 months vs every 40 months) and ratings volume (368 vs 13). 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.

Permutation and Combination holds the better App Store score, 4.1 against 1.6. That said, the two scores are not equally well evidenced: Desmos Test Mode has 368 ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 17% of Desmos Test Mode's written reviews are positive against 44% of Permutation and Combination's.

Desmos Test Mode ships an update every 4 months, Permutation and Combination every 40 months. Both last shipped on September 10, 2026.

## The numbers

| Metric | Desmos Test Mode | Permutation and Combination |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.6 (368 ratings)](https://appshunter.io/ios/app/desmos-test-mode/id977381005/reviews) | **[4.1 (13 ratings)](https://appshunter.io/ios/app/permutation-and-combination/id1006634963/reviews)** |
| Number of ratings | **368** | 13 |
| Positive reviews | 16.5% of reviews | **44.4% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 40 months |
| Monetization | Free | Free |
| Size | 6 MB | 23 MB |
| Requires iOS | 16.0 | **12.1** |
| Devices | iPhone, iPad | **iPhone, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Desmos](https://appshunter.io/developer/653517543) | [Keiji Matsui](https://appshunter.io/developer/365287272) |

## What reviewers say

### Desmos Test Mode

[App page](https://appshunter.io/ios/app/desmos-test-mode/id977381005)

This app provides restricted versions of graphing and scientific calculators designed to meet exam requirements. It allows users to practice for specific state or national assessments by selecting the appropriate test mode. Full, unrestricted calculator features are available in separate applications.

**Highlights:** Exam-compliant calculator modes, Graphing capabilities, Scientific calculator functions, Data tables and statistics, Interactive sliders, Points of interest on graphs

**In-app purchases:** none

**What reviewers like**

- 🚀 Useful app for tests
- 🔒 Secure calculator mode
- 👍 Free alternative to expensive calculators

**What reviewers complain about**

- 🐛 Buggy and unstable
- 🔒 Overly restrictive app lock
- 👎 Poor user interface and usability

**Reported bugs**

- App crashes and freezes during use
- Unexpected phone behavior and lockouts
- Compatibility issues across different devices and OS versions

**Requested features**

- Add customization options for the calculator interface
- Improve compatibility with older devices
- Provide more flexible calculator modes during tests


### Permutation and Combination

[App page](https://appshunter.io/ios/app/permutation-and-combination/id1006634963)

Easily calculate permutations and combinations with this educational tool. It provides a straightforward way to solve mathematical problems related to arrangements and selections.

**Highlights:** Calculate permutations, Calculate combinations, Easy to use interface, Educational tool

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Desmos Test Mode free?

Desmos Test Mode is free to download, with no in-app purchases.

### Is Permutation and Combination free?

Permutation and Combination is free to download, with no in-app purchases.

### Which has better reviews, Desmos Test Mode or Permutation and Combination?

Permutation and Combination is rated higher. Desmos Test Mode averages 1.6 out of 5 from 368 ratings, while Permutation and Combination averages 4.1 from 13 ratings.

### Do Desmos Test Mode or Permutation and Combination have ads?

Neither Desmos Test Mode nor Permutation and Combination shows ads.

### Which is updated more often, Desmos Test Mode or Permutation and Combination?

Desmos Test Mode ships an update every 4 months, and Permutation and Combination every 40 months. Most recently, Desmos Test Mode was updated on September 10, 2026 and Permutation and Combination on September 10, 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.*