# functionCalculator vs Parametric Factorization

The clearest difference is rating: functionCalculator at 4.3 against Parametric Factorization's 2.9. functionCalculator also leads on in-app purchases (none vs 8) and iOS requirement (10.3 vs 15.0). Parametric Factorization's advantage is ads (none vs shown) and update cadence (fortnightly vs every 11 months). On price, ratings volume and device support there is nothing between them.

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

functionCalculator holds the better App Store score, 4.3 against 2.9. Both are backed by a comparable volume of ratings — 6 and 8 respectively.

functionCalculator ships an update every 11 months, Parametric Factorization fortnightly. The most recent releases landed on June 1, 2026 and August 26, 2026 respectively.

## The numbers

| Metric | functionCalculator | Parametric Factorization |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (6 ratings)](https://appshunter.io/ios/app/functioncalculator/id1275985289/reviews)** | [2.9 (8 ratings)](https://appshunter.io/ios/app/parametric-factorization/id1493935902/reviews) |
| Number of ratings | 6 | **8** |
| Positive reviews | — | 40.0% 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


### Parametric Factorization

[App page](https://appshunter.io/ios/app/parametric-factorization/id1493935902)

This application helps users factor quadratic trinomials by entering three variables. It provides detailed solution steps and stores all calculations in a history for easy access and sharing. Supports positive and negative numbers, as well as decimals.

**Highlights:** Factors quadratic trinomials, Detailed solution steps, Input history, Supports decimals and negative numbers, Shareable solutions, 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 Parametric Factorization free?

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

### Which has better reviews, functionCalculator or Parametric Factorization?

functionCalculator is rated higher. functionCalculator averages 4.3 out of 5 from 6 ratings, while Parametric Factorization averages 2.9 from 8 ratings.

### Do functionCalculator or Parametric Factorization have ads?

functionCalculator shows ads; Parametric Factorization does not.

### Which is updated more often, functionCalculator or Parametric Factorization?

functionCalculator ships an update every 11 months, and Parametric Factorization fortnightly. Most recently, functionCalculator was updated on June 1, 2026 and Parametric Factorization on August 26, 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.*