Peak Flow Diary | Asthma
Not in any tracked top chart right now.
Updated 27 Sep 2026 · rankings refresh through the day
DeveloperKeyber Inc.
CategoryMedical
PriceFree
Released
Rating★ 5.0 (1)
Version6.1.0
Age rating4+
First seen by us
24 Sep 2026
Installs (est.)10k+ worldwide
Rating
5.0 ★
1 ratings
Measured
Peak Flow Diary | Asthma on the App Store
App details
App ID
6463603745
Publisher
Keyber Inc.
Minimum OS
iOS 15.0+
Content rating
4+
Languages
2
EN JA
Size
60 MB
Peak Flow Diary | Asthma downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. iPhone downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Business model: Ad-led
How Peak Flow Diary | Asthma makes money: subscriptions, one-off purchases and ads.
Ads · 1 ad networks
Ads
/mo
of revenue
Where it ranks now
Every top chart it appears in across 24 countries.
| Country | Charts | Rank |
|---|---|---|
| Not charting right now. | ||
Ratings
App Store, worldwide.
Rating
5.0 ★
1 ratings
Measured
Ratings
1
Measured
About Peak Flow Diary | Asthma
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
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
Latest updates
6.1.0
- Updated the libraries used by the app
- Fixed minor bugs