# Calculator +ㅤ vs Permutation Combination

The clearest difference is review sentiment: Calculator +ㅤ at 46% against Permutation Combination's 0%. Permutation Combination's advantage is in-app purchases (none vs 6) and update cadence (every 2 days vs fortnightly). On price, ads and device support there is nothing between them.

Both are free to download. Calculator +ㅤ sells 6 in-app purchases, starting at $2.99 per 7 days. Permutation Combination asks for nothing beyond the download.

Calculator +ㅤ ships an update fortnightly, Permutation Combination every 2 days. The most recent releases landed on September 23, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Calculator +ㅤ | Permutation Combination |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (4.5K ratings)](https://appshunter.io/ios/app/calculator-plus/id1597933199/reviews)** | — |
| Number of ratings | **4.5K** | — |
| Positive reviews | **45.9% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | Subscription | **Ad-supported** |
| Size | 55 MB | 31 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rocket Apps GmbH](https://appshunter.io/developer/1566586717) | [HIWAZERO](https://appshunter.io/developer/1621048794) |

## What reviewers say

### Calculator +ㅤ

[App page](https://appshunter.io/ios/app/calculator-plus/id1597933199)

This app simplifies math with basic, scientific, and fraction calculations. It also features a unique snap-and-scribble function to solve problems from photos. Customize your experience with themes and access a calculation history.

**Highlights:** Snap and Scribble Calculator, Basic Calculator, Scientific Calculator, Fraction Calculator, Currency Converter, Calculation History, Customizable Themes

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rocket Apps PRO Weekly | $2.99 | per 7 days |
| Rocket Apps PRO Monthly | $4.99 | per month |
| Rocket Apps PRO Yearly | $9.99 | per year |
| Rocket Apps PRO Offer | $19.99 | per year |
| Rocket Apps PRO Yearly | $19.99 | per year |
| Rocket Apps PRO Yearly | $29.99 | per year |

**What reviewers like**

- 👍 Easy to use
- 🚀 Accurate calculations
- 🎨 Excellent visuals
- 💡 Helpful for academic work

**What reviewers complain about**

- 💰 Subscription model too expensive
- 🔍 Decimal entry quirks
- 📺 Too many ads
- 🔒 Locked features behind paywall

**Reported bugs**

- Inaccurate square root calculations
- Compatibility issues on iPad
- Decimal point not recognized

**Requested features**

- Negative number support
- Improved fraction calculator
- Scientific calculator layout
- Option to disable history feature


### Permutation Combination

[App page](https://appshunter.io/ios/app/permutation-combination/id6448662601)

Easily calculate permutations and combinations for mathematics and statistics. This tool simplifies complex calculations, helping users save time and improve accuracy in exams and studies.

**Highlights:** Permutation calculations, Combination calculations, Time-saving for exams, Mathematical and statistical use, User-friendly interface

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Calculator +ㅤ free?

Calculator +ㅤ is free to download, with in-app purchases available.

### Is Permutation Combination free?

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

### Do Calculator +ㅤ or Permutation Combination have ads?

Both Calculator +ㅤ and Permutation Combination show ads.

### Which is updated more often, Calculator +ㅤ or Permutation Combination?

Calculator +ㅤ ships an update fortnightly, and Permutation Combination every 2 days. Most recently, Calculator +ㅤ was updated on September 23, 2026 and Permutation Combination 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.*