# DiscountCalculator byNSDev vs EXTRAVIS

The clearest difference is iOS requirement: EXTRAVIS at 13.0 against DiscountCalculator byNSDev's 15.6. On price, ads, in-app purchases and device support there is nothing between them.

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

## The numbers

| Metric | DiscountCalculator byNSDev | EXTRAVIS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 21 months |
| Size | 3 MB | 204 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [NIHON SYSTEM DEVELOPER CORPORATION](https://appshunter.io/developer/1198103734) | [Linksmart Technology(Zhongshan) Co., Ltd.](https://appshunter.io/developer/1753871181) |

## What reviewers say

### DiscountCalculator byNSDev

[App page](https://appshunter.io/ios/app/discountcalculator-bynsdev/id1280454049)

**Features:** macOS Compatibility

**In-app purchases:** none


### EXTRAVIS

[App page](https://appshunter.io/ios/app/extravis/id6504791824)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DiscountCalculator byNSDev free?

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

### Is EXTRAVIS free?

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

### Do DiscountCalculator byNSDev or EXTRAVIS have ads?

Neither DiscountCalculator byNSDev nor EXTRAVIS shows ads.

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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.*