# Quadratic Formula Calculator vs Function Fitter

The clearest difference is in-app purchases: Function Fitter at none against Quadratic Formula Calculator's 1. Function Fitter also leads on ads (none vs shown) and update cadence (monthly vs every 9 months). Quadratic Formula Calculator's advantage is iOS requirement (15.0 vs 17.0). On price and device support there is nothing between them.

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

Quadratic Formula Calculator ships an update every 9 months, Function Fitter monthly. The most recent releases landed on June 1, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Quadratic Formula Calculator | Function Fitter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (71 ratings)](https://appshunter.io/ios/app/quadratic-formula-calculator/id1425311468/reviews)** | — |
| Number of ratings | **71** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 9 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 3 MB | 4 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Edward Prokopik](https://appshunter.io/developer/1077587110) | [29Apps LLC](https://appshunter.io/developer/1817021563) |

## 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 |


### Function Fitter

[App page](https://appshunter.io/ios/app/function-fitter/id6748284369)

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

**In-app purchases:** none


## Frequently asked questions

### Is Quadratic Formula Calculator free?

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

### Is Function Fitter free?

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

### Do Quadratic Formula Calculator or Function Fitter have ads?

Quadratic Formula Calculator shows ads; Function Fitter does not.

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

Quadratic Formula Calculator ships an update every 9 months, and Function Fitter monthly. Most recently, Quadratic Formula Calculator was updated on June 1, 2026 and Function Fitter on September 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*