# Altimeter vs eCalc

The clearest difference is price: eCalc at Free against Altimeter's $0.99. eCalc also leads on iOS requirement (17.6 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

eCalc is free to download; Altimeter costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Altimeter | eCalc |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 2 days |
| Size | 46 MB | 2 MB |
| Requires iOS | 26.0 | **17.6** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [晋坤 张](https://appshunter.io/developer/1880866815) | [Quynh Dinh Huu](https://appshunter.io/developer/1140053429) |

## What reviewers say

### Altimeter

[App page](https://appshunter.io/ios/app/altimeter-elevation-check-in/id6759822396)

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

**In-app purchases:** none


### eCalc

[App page](https://appshunter.io/ios/app/ecalc-easy-calculator/id6787689502)

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

**In-app purchases:** none


## Frequently asked questions

### Is Altimeter free?

Altimeter costs $0.99, with no in-app purchases.

### Is eCalc free?

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

### Do Altimeter or eCalc have ads?

Neither Altimeter nor eCalc 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.*