# KAN Quick Surface vs GasCalc Pro

The clearest difference is iOS requirement: KAN Quick Surface at 11.0 against GasCalc Pro's 26.5. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

KAN Quick Surface ships an update every 11 months, GasCalc Pro every 7 months. The most recent releases landed on September 9, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | KAN Quick Surface | GasCalc Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 7 months** |
| Size | 29 MB | 3 MB |
| Requires iOS | **11.0** | 26.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [KAN-therm GmbH](https://appshunter.io/developer/1088230769) | [Nergiz Calhan](https://appshunter.io/developer/547527777) |

## What reviewers say

### KAN Quick Surface

[App page](https://appshunter.io/ios/app/kan-quick-surface/id1243377753)

**Features:** macOS Compatibility

**In-app purchases:** none


### GasCalc Pro

[App page](https://appshunter.io/ios/app/gascalc-pro/id6748356723)

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

**In-app purchases:** none


## Frequently asked questions

### Is KAN Quick Surface free?

KAN Quick Surface is free to download, with no in-app purchases.

### Is GasCalc Pro free?

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

### Do KAN Quick Surface or GasCalc Pro have ads?

Neither KAN Quick Surface nor GasCalc Pro shows ads.

### Which is updated more often, KAN Quick Surface or GasCalc Pro?

KAN Quick Surface ships an update every 11 months, and GasCalc Pro every 7 months. Most recently, KAN Quick Surface was updated on September 9, 2026 and GasCalc Pro on September 22, 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.*