# Function Calc vs Duel Connect

The clearest difference is rating: Function Calc at 5.0 against Duel Connect's 3.7. Function Calc also leads on in-app purchases (none vs 1) and ads (none vs shown). Duel Connect's advantage is review sentiment (100% vs 80%) and iOS requirement (13.0 vs 18.6). On price, ratings volume and device support there is nothing between them.

Both are free to download. Duel Connect sells 1 one-off in-app purchase. Function Calc asks for nothing beyond the download.

Function Calc holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 3 respectively. Written reviews complicate that: 80% of Function Calc's written reviews are positive against 100% of Duel Connect's, so the app with the better star average is not the one people write more warmly about.

Function Calc ships an update monthly, Duel Connect every 2 months. The most recent releases landed on September 23, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Function Calc | Duel Connect |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/function-calc/id1188227053/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/duel-connect/id1668095322/reviews) |
| Number of ratings | 3 | 3 |
| Positive reviews | 80.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 5 MB | 155 MB |
| Requires iOS | 18.6 | **13.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hugh Pelham](https://appshunter.io/developer/1188227052) | [Maximilian Hemme](https://appshunter.io/developer/1657407562) |

## What reviewers say

### Function Calc

[App page](https://appshunter.io/ios/app/function-calc/id1188227053)

This app offers a powerful, programmable scientific calculator with graphing capabilities. It allows users to create custom functions, store equations, and perform complex calculations with ease. The interface features a visible tape display and supports dictation for statistical analysis.

**Highlights:** Programmable custom functions, Graphing capabilities, Tape display with edit/undo, Unit conversions (120+), Dictate calculations, Export graphs (PDF, PNG)

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

**In-app purchases:** none


### Duel Connect

[App page](https://appshunter.io/ios/app/duel-connect/id1668095322)

Track life points for card games with a stylish and customizable interface. Offers multiple input methods, duel history, and performance statistics with graphs. Includes dice and coin simulators for added functionality.

**Highlights:** Life points counter, Multiple input methods (keyboard, gesture), Duel history and statistics, Dice and coin simulator, Customizable design and backgrounds, QR code opponent scanning

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Alle Hintergründe freischalten | $1.99 | one-time |


## Frequently asked questions

### Is Function Calc free?

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

### Is Duel Connect free?

Duel Connect is free to download, with in-app purchases available.

### Which has better reviews, Function Calc or Duel Connect?

Function Calc is rated higher. Function Calc averages 5.0 out of 5 from 3 ratings, while Duel Connect averages 3.7 from 3 ratings.

### Do Function Calc or Duel Connect have ads?

Duel Connect shows ads; Function Calc does not.

### Which is updated more often, Function Calc or Duel Connect?

Function Calc ships an update monthly, and Duel Connect every 2 months. Most recently, Function Calc was updated on September 23, 2026 and Duel Connect on September 19, 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.*