# Scientific Calculator fx vs Kapoo

The clearest difference is ads: Kapoo at none against Scientific Calculator fx's shown. Kapoo also leads on rating (5.0 vs 4.6) and update cadence (every 2 days vs every 2 weeks). Scientific Calculator fx's advantage is ratings volume (446 vs 1). On price, in-app purchases, monetization model 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 and Kapoo sells 5 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Kapoo holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Scientific Calculator fx has 446 ratings behind it against 1, so its average is the more settled of the two.

Scientific Calculator fx ships an update every 2 weeks, Kapoo every 2 days. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Scientific Calculator fx | Kapoo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (446 ratings)](https://appshunter.io/ios/app/scientific-calculator-fx-991/id1673640297/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/kapoo/id6760035185/reviews)** |
| Number of ratings | **446** | 1 |
| Positive reviews | 83.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 27 MB | 204 MB |
| Requires iOS | **15.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dinh Phuc](https://appshunter.io/developer/1673640299) | [David Tabi](https://appshunter.io/developer/1670876806) |

## 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


### Kapoo

[App page](https://appshunter.io/ios/app/kapoo/id6760035185)

Discover and learn indigenous languages of Ecuador through interactive lessons, vocabulary challenges, and pronunciation practice. Explore cultural insights and track your learning progress in a fun, engaging way.

**Highlights:** Interactive lessons, Listening and pronunciation practice, Vocabulary challenges, Cultural learning, Progress tracking

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kapoo Premium Monthly | $4.99 | per month |
| Kapoo Classic | $5.99 | per month |
| Kapoo Basic | $9.99 | per month |
| Kapoo Plus | $14.99 | per month |
| Kapoo Premium Plus | $19.99 | per month |


## Frequently asked questions

### Is Scientific Calculator fx free?

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

### Is Kapoo free?

Kapoo is free to download, with in-app purchases available.

### Which has better reviews, Scientific Calculator fx or Kapoo?

Kapoo is rated higher. Scientific Calculator fx averages 4.6 out of 5 from 446 ratings, while Kapoo averages 5.0 from 1 ratings.

### Do Scientific Calculator fx or Kapoo have ads?

Scientific Calculator fx shows ads; Kapoo does not.

### Which is updated more often, Scientific Calculator fx or Kapoo?

Scientific Calculator fx ships an update every 2 weeks, and Kapoo every 2 days. Most recently, Scientific Calculator fx was updated on October 30, 2026 and Kapoo on October 28, 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.*