# 计算器 vs Altimeter

The clearest difference is price: 计算器 at Free against Altimeter's $0.99. 计算器 also leads on iOS requirement (11.0 vs 26.0). Altimeter's advantage is in-app purchases (none vs 7). On ads and device support there is nothing between them.

计算器 is free to download; Altimeter costs $0.99 up front. 计算器 sells 7 in-app purchases, starting at $0.99 per 7 days. Altimeter asks for nothing beyond the download.

## The numbers

| Metric | 计算器 | Altimeter |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 10 days | — |
| Size | 125 MB | 46 MB |
| Requires iOS | **11.0** | 26.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 9+ | 17+ |
| Developer | [冠维 骆](https://appshunter.io/developer/1711309192) | [晋坤 张](https://appshunter.io/developer/1880866815) |

## What reviewers say

### 计算器

[App page](https://appshunter.io/ios/app/id6497794776)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周会员 | $0.99 | per 7 days |
| 周会员 | $3.99 | per 7 days |
| 月会员 | $5.99 | per month |
| 年会员 | $14.99 | per year |
| 周会员 | $3.99 | one-time |
| 月会员 | $4.99 | one-time |
| 年会员 | $14.99 | one-time |


### Altimeter

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

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

**In-app purchases:** none


## Frequently asked questions

### Is 计算器 free?

计算器 is free to download, with in-app purchases available.

### Is Altimeter free?

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

### Do 计算器 or Altimeter have ads?

Neither 计算器 nor Altimeter 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.*