# functionCalculator vs Quadratic Equation Roots

The clearest difference is in-app purchases: functionCalculator at none against Quadratic Equation Roots's 8. functionCalculator also leads on iOS requirement (10.3 vs 15.0). Quadratic Equation Roots's advantage is ads (none vs shown) and update cadence (fortnightly vs every 11 months). On price, rating, ratings volume and device support there is nothing between them.

Both are free to download. Quadratic Equation Roots sells 8 one-off in-app purchases. functionCalculator asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.3 for functionCalculator against 4.3 for Quadratic Equation Roots. Both are backed by a comparable volume of ratings — 6 and 6 respectively.

functionCalculator ships an update every 11 months, Quadratic Equation Roots fortnightly. The most recent releases landed on June 1, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | functionCalculator | Quadratic Equation Roots |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (6 ratings)](https://appshunter.io/ios/app/functioncalculator/id1275985289/reviews) | [4.3 (6 ratings)](https://appshunter.io/ios/app/quadratic-equation-roots/id1280322061/reviews) |
| Number of ratings | 6 | 6 |
| Positive reviews | — | 75.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 11 months | **Fortnightly** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 6 MB | 179 MB |
| Requires iOS | **10.3** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jirou Fukuda](https://appshunter.io/developer/689603483) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## What reviewers say

### functionCalculator

[App page](https://appshunter.io/ios/app/functioncalculator/id1275985289)

This app calculates the value of mathematical functions y = f(x) for various types of numbers, including irrational ones. It displays results as exact fractions with square roots and can convert them to decimals. The app also supports calculations involving two different input values, alpha and beta.

**Highlights:** Calculate function values for any number type, Display results as exact fractions, Convert results to decimal, Perform operations on two input values, Supports irrational numbers

**Features:** macOS Compatibility

**In-app purchases:** none


### Quadratic Equation Roots

[App page](https://appshunter.io/ios/app/quadratic-equation-roots/id1280322061)

Easily find the zeros of a function using the pq formula. Input values for p and q, and the app calculates the solution. Features include a history of calculations and the ability to share results.

**Highlights:** PQ formula calculation, Input p and q values, History of calculations, Shareable solutions, Fraction input support, Ad removal option

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| +30 User Tokens | $0.29 | one-time |
| +1 Convenience Token / 6h, max. +2 | $0.59 | one-time |
| +2 Convenience Tokens / 6h, max. +4 | $0.99 | one-time |
| +150 User Tokens | $0.99 | one-time |
| +300 User Tokens | $1.49 | one-time |
| +4 Convenience Tokens / 6h, max. +8 | $1.59 | one-time |
| Remove Ads | $1.99 | one-time |
| Lifetime Access | $1.99 | one-time |


## Frequently asked questions

### Is functionCalculator free?

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

### Is Quadratic Equation Roots free?

Quadratic Equation Roots is free to download, with in-app purchases available.

### Which has better reviews, functionCalculator or Quadratic Equation Roots?

functionCalculator and Quadratic Equation Roots are both rated 4.3 out of 5 on the App Store, from 6 and 6 ratings respectively.

### Do functionCalculator or Quadratic Equation Roots have ads?

functionCalculator shows ads; Quadratic Equation Roots does not.

### Which is updated more often, functionCalculator or Quadratic Equation Roots?

functionCalculator ships an update every 11 months, and Quadratic Equation Roots fortnightly. Most recently, functionCalculator was updated on June 1, 2026 and Quadratic Equation Roots on September 14, 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.*