# Peak Flow Diary | Asthma

> Understand Your Breathing

Canonical page: [https://chrome-stats.com/d/id6463603745](https://chrome-stats.com/d/id6463603745)

## Overview

- **ID:** `id6463603745`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Keyber Inc.
- **Category:** Medical
- **Rating:** 4.70 / 5 (35 ratings)
- **Version:** 6.1.0
- **Last updated:** 2026-09-08
- **First published:** 2024-06-02
- **Size:** 57 MB
- **Data as of:** 2026-09-19
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/peak-flow-diary-asthma/id6463603745)
- **Website:** [https://keyber.jp](https://keyber.jp/)
- **Privacy policy:** [https://keyber.jp/privacy-policy.html](https://keyber.jp/privacy-policy.html)

## Description

Understand Your Breathing, Every Day.

Peak Flow Diary is an easy-to-use app that helps you record your daily peak flow readings and track changes in your breathing over time.

With just a few seconds of recording each day, you can better understand:

• Your usual breathing condition
• Changes and trends in your breathing
• When your condition starts to worsen

Color-coded zones make it easy to see your current breathing status at a glance, helping you manage your respiratory health every day.

【Key Features】

■ Quick and easy daily recording
Record your peak flow in seconds using either the slider or keyboard input.
Choose the method that works best for you.

■ Color-coded graphs
View your peak flow readings in easy-to-read graphs.
Color-coded zones help you quickly understand your current condition and identify trends over time.

■ History and notes
Review all your previous records in one place.
You can also save notes about your symptoms, activities, or daily events.

■ Medical Report (PDF)
Automatically generate a PDF medical report from your recorded data.
Print it or show it on your smartphone to help explain your condition during medical appointments.

■ Reminder notifications
Set reminders so you never forget to record your peak flow.

■ Secure cloud backup
Your records are safely stored in the cloud, making it easy to restore your data when changing devices.

■ Simple and intuitive design
Designed to be easy to use every day, so you can build a lasting habit.

【Premium】

Unlock additional features to gain deeper insights into your breathing.

■ Breathing Monitor
Analyzes your daily peak flow readings and sends push notifications when sudden drops or declining trends are detected.

■ Long-term analysis
View your peak flow data over an entire year to identify long-term trends that may not be visible within just 28 days.

■ Comparison graphs
Compare your current data with the previous year to better understand seasonal changes and long-term patterns.

■ Extended Medical Reports
Generate PDF medical reports covering up to one year of recorded data.

■ Ad-free experience
Enjoy the app without advertisements.

Keeping a daily record is the first step toward better understanding your breathing.

Start tracking your breathing today with Peak Flow Diary.

Peak Flow Diary Terms of Service
https://susatthi-asthma-diary-prod.web.app/terms-of-service.html?lang=en

Peak Flow Diary Premium Terms of Service
https://susatthi-asthma-diary-prod.web.app/terms-of-service-premium.html?lang=en

## Rankings

- #198,657 — Overall

## Similar extensions and apps

- [Peak Flow Log - Asthma diary](https://chrome-stats.com/d/id867777007) — 5.00 / 5
- [Your Peak Flow](https://chrome-stats.com/d/id1544967818) — 2.00 / 5
- [Easy Peak Flow Diary](https://chrome-stats.com/d/id1562094758) — 3.70 / 5
- [Daily Breathe: Asthma Tracker](https://chrome-stats.com/d/id6477149460) — 4.90 / 5
- [PeakflowLogger](https://chrome-stats.com/d/id6741367258)
- [Asthma Diary Peak Flow Med Log](https://chrome-stats.com/d/id6772425829)
- [Asthma Tracker](https://chrome-stats.com/d/id930849539) — 2.80 / 5
- [COPD Tracker Diary](https://chrome-stats.com/d/id6761026981)
- [Smart Asthma: Forecast Asthma](https://chrome-stats.com/d/id1409692428) — 4.20 / 5
- [Smart COPD](https://chrome-stats.com/d/id6737186297)
- [Track My Asthma](https://chrome-stats.com/d/id1539207733) — 4.00 / 5
- [Asthma Plan](https://chrome-stats.com/d/id6777456863)

---

Source: [Chrome-Stats](https://chrome-stats.com/d/id6463603745)