# Peak Flow Log vs MIR SMART ONE

The clearest difference is review sentiment: Peak Flow Log at 100% against MIR SMART ONE's 25%. Peak Flow Log also leads on rating (5.0 vs 2.8) and update cadence (every 2 weeks vs every 4 months). MIR SMART ONE's advantage is in-app purchases (none vs 1) and ratings volume (22 vs 1). On price, ads and device support there is nothing between them.

Both are free to download. Peak Flow Log sells 1 one-off in-app purchase. MIR SMART ONE asks for nothing beyond the download.

Peak Flow Log holds the better App Store score, 5.0 against 2.8. That said, the two scores are not equally well evidenced: MIR SMART ONE has 22 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of Peak Flow Log's written reviews are positive against 25% of MIR SMART ONE's.

Peak Flow Log ships an update every 2 weeks, MIR SMART ONE every 4 months. The most recent releases landed on October 10, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Peak Flow Log | MIR SMART ONE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/peak-flow-log-asthma-diary/id867777007/reviews)** | [2.8 (22 ratings)](https://appshunter.io/ios/app/mir-smart-one/id1010664940/reviews) |
| Number of ratings | 1 | **22** |
| Positive reviews | **100.0% of reviews** | 25.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 4 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 5 MB | 22 MB |
| Requires iOS | 26.2 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Friedrich Ewald](https://appshunter.io/developer/867777010) | [MIR Medical International Research](https://appshunter.io/developer/1010662698) |

## What reviewers say

### Peak Flow Log

[App page](https://appshunter.io/ios/app/peak-flow-log-asthma-diary/id867777007)

This app helps you monitor your asthma and peak flow readings. It uses a color-coded system to indicate the quality of your measurements. Additional features are available through a premium version.

**Highlights:** Track asthma and peak flow, Color-coded value indicators, Premium features available, Feature requests welcome

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Peak Flow Log Plus | $0.99 | one-time |


### MIR SMART ONE

[App page](https://appshunter.io/ios/app/mir-smart-one/id1010664940)

This app works with a connected device to measure respiratory function, including FEV1 and PEF. It provides real-time feedback with a traffic light system and stores results for easy tracking and sharing. Personal health data is used solely for calculating target values.

**Highlights:** Bluetooth Peak Flow and FEV1 measurement, Real-time data transfer and animation, Traffic light health indicator, Automatic test result storage, Symptom and note logging, PDF report generation for sharing, Apple Health integration

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Peak Flow Log free?

Peak Flow Log is free to download, with in-app purchases available.

### Is MIR SMART ONE free?

MIR SMART ONE is free to download, with no in-app purchases.

### Which has better reviews, Peak Flow Log or MIR SMART ONE?

Peak Flow Log is rated higher. Peak Flow Log averages 5.0 out of 5 from 1 ratings, while MIR SMART ONE averages 2.8 from 22 ratings.

### Do Peak Flow Log or MIR SMART ONE have ads?

Neither Peak Flow Log nor MIR SMART ONE shows ads.

### Which is updated more often, Peak Flow Log or MIR SMART ONE?

Peak Flow Log ships an update every 2 weeks, and MIR SMART ONE every 4 months. Most recently, Peak Flow Log was updated on October 10, 2026 and MIR SMART ONE on October 20, 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.*