# Quadratic Formula Calculator vs Calculator 17

Quadratic Formula Calculator and Calculator 17 both sit at 4.7 stars, but that hides the real split: 75% of Quadratic Formula Calculator's written reviews are positive against 22% of Calculator 17's. Calculator 17's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, rating, device support and iOS requirement there is nothing between them.

Both are free to download. Quadratic Formula Calculator sells 1 one-off in-app purchase. Calculator 17 asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for Quadratic Formula Calculator against 4.6 for Calculator 17. That said, the two scores are not equally well evidenced: Calculator 17 has 971 ratings behind it against 71, so its average is the more settled of the two. Written reviews are what separate them: 75% of Quadratic Formula Calculator's written reviews are positive against 22% of Calculator 17's.

Quadratic Formula Calculator ships an update every 9 months, Calculator 17 every 4 days. The most recent releases landed on June 1, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Quadratic Formula Calculator | Calculator 17 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (71 ratings)](https://appshunter.io/ios/app/quadratic-formula-calculator/id1425311468/reviews)** | [4.6 (971 ratings)](https://appshunter.io/ios/app/calculator-17-math-solver/id6452015902/reviews) |
| Number of ratings | 71 | **971** |
| Positive reviews | **75.0% of reviews** | 21.5% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 9 months | **Every 4 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 3 MB | 5 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Edward Prokopik](https://appshunter.io/developer/1077587110) | [AI APPS SRL](https://appshunter.io/developer/1697892814) |

## What reviewers say

### Quadratic Formula Calculator

[App page](https://appshunter.io/ios/app/quadratic-formula-calculator/id1425311468)

This app simplifies solving quadratic equations by allowing users to input coefficients a, b, and c. It quickly displays the solutions for x, including support for imaginary numbers. Users can also switch between light and dark themes for a personalized experience.

**Highlights:** Input coefficients a, b, and c, Displays solutions for x, Supports imaginary number solutions, Light and Dark modes

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Mode | $1.99 | one-time |


### Calculator 17

[App page](https://appshunter.io/ios/app/calculator-17-math-solver/id6452015902)

This app offers a user-friendly calculator with basic and scientific modes. Access calculations instantly via a home screen widget and review past computations in a saved history.

**Highlights:** User-friendly interface, Basic and scientific modes, Home screen widget, LiveActivity Standby for iPhone, Calculation history, Customizable themes

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

**In-app purchases:** none

**What reviewers like**

- 👍 Convenient and easy to use
- 💡 Excellent free app

**What reviewers complain about**

- 🐛 Keyboard not functioning properly
- 🐛 Widget not working or slow
- 🐛 Screen sizing issues
- 🐛 Only works in portrait mode on iPad

**Reported bugs**

- Widget shows up blank
- Numerical display is cut off
- Significant delay between key presses and display update

**Requested features**

- Add landscape mode support
- Improve widget responsiveness
- Increase bracket functionality


## Frequently asked questions

### Is Quadratic Formula Calculator free?

Quadratic Formula Calculator is free to download, with in-app purchases available.

### Is Calculator 17 free?

Calculator 17 is free to download, with no in-app purchases.

### Which has better reviews, Quadratic Formula Calculator or Calculator 17?

Quadratic Formula Calculator is rated higher. Quadratic Formula Calculator averages 4.7 out of 5 from 71 ratings, while Calculator 17 averages 4.6 from 971 ratings.

### Do Quadratic Formula Calculator or Calculator 17 have ads?

Quadratic Formula Calculator shows ads; Calculator 17 does not.

### Which is updated more often, Quadratic Formula Calculator or Calculator 17?

Quadratic Formula Calculator ships an update every 9 months, and Calculator 17 every 4 days. Most recently, Quadratic Formula Calculator was updated on June 1, 2026 and Calculator 17 on September 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.*