Quadratic Formula Calculator vs Function Fitter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Quadratic Formula Calculator
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.
- Input coefficients a, b, and c
- Displays solutions for x
- Supports imaginary number solutions
- Light and Dark modes
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The easiest quadratic formula solver. Simply enter the values for a, b, and c and the solutions for x will be displayed. - Supports imaginary numbers as solutions. - Light and Dark modes
Function Fitter
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Function curve fitting using custom function that you enter. Reads data values either from file or manual entry, and tries to fit your function to the data by adjusting 1 to 4 parameters for a least-squares best fit. For enjoyment only, NOT for serious data needs. This is minimalist by design with no ads, no in-app purchases, no bells and whistles, and no fancy moving graphics to distract you, just fun. Note: Entertainment value only, fun using different parameter starting values.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Quadratic Formula Calculator | Function Fitter |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (71 ratings) — better | — |
| Positive reviews | 75.0% of reviews | — |
| Number of ratings | 71 — better | — |
| Update frequency | Every 9 months | Monthly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 3 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Edward Prokopik | 29Apps LLC |
In-app purchases
Quadratic Formula Calculator
- Pro Mode$1.99
Function Fitter
No in-app purchases
Questions
Is Quadratic Formula Calculator free?
Is Function Fitter free?
Do Quadratic Formula Calculator or Function Fitter have ads?
Which is updated more often, Quadratic Formula Calculator or Function Fitter?
Other comparisons
