# Scientific Calculator fx vs Average.app

The clearest difference is in-app purchases: Average.app at none against Scientific Calculator fx's 5. Scientific Calculator fx's advantage is iOS requirement (15.0 vs 17.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Scientific Calculator fx sells 5 in-app purchases, starting at $1.99 per month. Average.app asks for nothing beyond the download.

Scientific Calculator fx ships an update every 2 weeks, Average.app every 4 weeks. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Scientific Calculator fx | Average.app |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (446 ratings)](https://appshunter.io/ios/app/scientific-calculator-fx-991/id1673640297/reviews)** | — |
| Number of ratings | **446** | — |
| Positive reviews | 83.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 2 weeks** | Every 4 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 27 MB | 1 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Dinh Phuc](https://appshunter.io/developer/1673640299) | [Petr Vocelka](https://appshunter.io/developer/1707200653) |

## What reviewers say

### Scientific Calculator fx

[App page](https://appshunter.io/ios/app/scientific-calculator-fx-991/id1673640297)

This app provides a powerful scientific calculator with step-by-step solutions for equations, advanced functions, and graphing capabilities. It includes a formula library and unit converter, inspired by a popular Casio model, to aid in learning and problem-solving for math and science subjects.

**Highlights:** Step-by-step equation solver, Advanced scientific functions, Graphing mode, Formula library, Unit converter, Casio fx-991 inspired interface

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium Access | $1.99 | per month |
| 6-Month Premium Membership | $2.49 | per 6 months |
| Yearly Premium Access | $7.99 | per year |
| Remove Ads 30 Days | $0.99 | one-time |
| HiEdu Pro Lifetime | $14.99 | one-time |

**What reviewers like**

- 👍 Very helpful for classes
- 💰 Free to use
- 👍 Useful without physical calculator
- 👍 Good for engineering students
- 👍 Handles imaginary numbers

**What reviewers complain about**

- 🐛 Latest update inconvenient
- 🐛 Update overrides calculations
- 🐛 Mistake in challenge section
- 🐛 Removed important buttons
- 🐛 Cannot find pi button

**Reported bugs**

- App crashes on loading screen
- App closes immediately on opening
- App crashes on iOS 18
- App closes after update
- Cannot upgrade to paid version

**Requested features**

- Fix update issue with calculation display
- Fix duplicate log key in Fx-350 layout
- Add CW layout for Casio fx991 cw
- Change ☐² to X² and ☐⁻¹ to X⁻¹


### Average.app

[App page](https://appshunter.io/ios/app/averageapp/id6466313076)

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

**In-app purchases:** none


## Frequently asked questions

### Is Scientific Calculator fx free?

Scientific Calculator fx is free to download, with in-app purchases available.

### Is Average.app free?

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

### Do Scientific Calculator fx or Average.app have ads?

Both Scientific Calculator fx and Average.app show ads.

### Which is updated more often, Scientific Calculator fx or Average.app?

Scientific Calculator fx ships an update every 2 weeks, and Average.app every 4 weeks. Most recently, Scientific Calculator fx was updated on October 30, 2026 and Average.app on October 25, 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.*