# Metavo vs Expiration Alert

The clearest difference is iOS requirement: Metavo at 15.0 against Expiration Alert's 17.0. 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 | Metavo | Expiration Alert |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/metavo/id6760642506/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 days | — |
| Monetization | Free | — |
| Size | 45 MB | 2 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Qiji Matrix Technology Co., Ltd](https://appshunter.io/developer/1874244737) | [志 杨](https://appshunter.io/developer/1887142174) |

## What reviewers say

### Metavo

[App page](https://appshunter.io/ios/app/metavo/id6760642506)

This app records and displays gas concentrations from professional monitoring devices, such as carbon dioxide and breath ketones. It offers real-time measurement, data storage, and historical trend analysis through charts to help users understand their metabolic status and health changes.

**Highlights:** Real-time gas concentration measurement, Data storage and historical query, Visual trend charts, Metabolic status tracking, Health change references

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

**In-app purchases:** none


### Expiration Alert

[App page](https://appshunter.io/ios/app/expiration-alert/id6760998622)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Metavo free?

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

### Is Expiration Alert free?

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

### Do Metavo or Expiration Alert have ads?

Neither Metavo nor Expiration Alert 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.*