# PeakflowLogger vs Peak Flow Log

The clearest difference is review sentiment: PeakflowLogger at 100% against Peak Flow Log's 0%. PeakflowLogger also leads on update cadence (weekly vs every 3 weeks). Peak Flow Log's advantage is price (Free vs $0.99) and ads (none vs shown). On in-app purchases, monetization model, device support and iOS requirement there is nothing between them.

Peak Flow Log is free to download; PeakflowLogger costs $0.99 up front. PeakflowLogger sells 1 one-off in-app purchase and Peak Flow Log sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

PeakflowLogger ships an update weekly, Peak Flow Log every 3 weeks. The most recent releases landed on October 30, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | PeakflowLogger | Peak Flow Log |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[3.0 (1 ratings)](https://appshunter.io/ios/app/peak-flow-log-asthma-diary/id6794622470/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 3 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 3 MB | 3 MB |
| Requires iOS | 18.2 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [OT Consulting UG](https://appshunter.io/developer/1784934985) | [Yoshifumi Sato](https://appshunter.io/developer/6780413827) |

## What reviewers say

### PeakflowLogger

[App page](https://appshunter.io/ios/app/peakflowlogger/id6741367258)

Easily log and monitor your peak flow measurements to manage asthma and respiratory health. Visualize trends with color-coded zones and receive daily reminders. Securely sync data with healthcare providers.

**Highlights:** Peak flow measurement logging, Trend analysis charts, Color-coded health zones, Multiple user profiles, Daily measurement reminders, iCloud sync and data sharing

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### Peak Flow Log

[App page](https://appshunter.io/ios/app/peak-flow-log-asthma-diary/id6794622470)

Record your peak flow readings and visualize your asthma zones. Log reliever puffs, symptoms, and triggers to track trends and generate PDF reports for your doctor. Your data stays private and works offline.

**Highlights:** Visualize asthma zones (Green, Yellow, Red), Log reliever puffs, symptoms, and triggers, Track trends over time, Create shareable PDF reports, Offline functionality, Multi-user support

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Peak Flow Log Pro | $3.99 | one-time |


## Frequently asked questions

### Is PeakflowLogger free?

PeakflowLogger costs $0.99, and also offers in-app purchases.

### Is Peak Flow Log free?

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

### Do PeakflowLogger or Peak Flow Log have ads?

PeakflowLogger shows ads; Peak Flow Log does not.

### Which is updated more often, PeakflowLogger or Peak Flow Log?

PeakflowLogger ships an update weekly, and Peak Flow Log every 3 weeks. Most recently, PeakflowLogger was updated on October 30, 2026 and Peak Flow Log on November 6, 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.*