---
title: "Peak Flow Diary | Asthma - Reviews, Revenue and Downloads in United Kingdom | Apple App Store"
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"
---

# Peak Flow Diary | Asthma — United Kingdom
> Understand Your Breathing

![Peak Flow Diary App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/d4/36/f4/d436f4e7-4f8a-a695-c444-7273a8ab5283/AppIcon-prod-0-0-1x_U007emarketing-0-11-0-85-220.png/434x0w.png)

**Developer:** [Keyber](https://apptail.io/developer/keyber-CIBc) (Japan)
**Category:** Medical
**Rating:** 4.7/5 (162 ratings)
**Price:** Free
**Bundle ID:** jp.susatthi.asthma-diary
**Store:** Apple App Store
**Country:** United Kingdom
**Version:** 6.1.0 (released 2026-09-08)
**Original Release:** 2024-06-02
**Languages:** English, Japanese

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/gb/app/app/id6463603745)
**AppTail Page:** [https://apptail.io/app/peak-flow-diary-asthma-amZn/united-kingdom](https://apptail.io/app/peak-flow-diary-asthma-amZn/united-kingdom)

## Peak Flow Diary 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


Peak Flow Diary Premium Terms of Service


## Peak Flow Diary Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/cb/de/fe/cbdefea5-860a-b4b8-654b-82e9aabc7103/iOS-6.5-en-1.png/1284x2778.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/3f/61/c9/3f61c9a6-ecfd-bc81-ea1c-00388dec951b/iOS-6.5-en-2.png/1284x2778.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/7b/e5/19/7be5194b-ebb4-584e-1d7d-dd628a806846/iOS-6.5-en-3.png/1284x2778.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/4c/d0/80/4cd0804f-42d6-e3d7-1baf-b5f78ab2b219/iOS-6.5-en-4.png/1284x2778.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/03/06/07/03060711-8e6d-efc0-76c8-089103b0ff72/iOS-6.5-en-5.png/1284x2778.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/77/0d/25/770d250b-088f-d791-5de7-5bc89a834184/iOS-6.5-en-6.png/1284x2778.png)

## Peak Flow Diary Rating Breakdown in United Kingdom
- 5 stars: 128 (79%)
- 4 stars: 25 (15%)
- 3 stars: 4 (2%)
- 2 stars: 3 (2%)
- 1 stars: 2 (1%)

## Peak Flow Diary Reviews in United Kingdom

### ****- "Good to great"
What would make this app better is to be able to edit the areas of what’s good and what’s are of concern to our own asthma plan
-- emmamichelle1181, 2026-04-18

### ***-- "Cannot adjust the traffic light system"
Following being poorly and having peak flow done, I was told that if my peak flow is at 200 as this is below 50% of my normal peak flow - however the app states 100 is the action required - would be helpful if people could adjust the warning states based on the recommendation from their healthcare professional advice. Sadly based on this I have deleted the app as it is not useful for me.
-- Scrambo_Y, 2026-04-16

### ****- "Print"
I live the app but there should be a way to print out all your data thanks
-- man dreix, 2026-01-26

### ***** "Easy to use and useful"
Very easy to use and keep track of your asthma.
-- Littlemiss80s, 2025-12-10

### ***** "Brilliant at helping me keep track."
I’ve only just been diagnosed with Asthma and have been trying to get to grips with this new routine of inhalers and peak flow and this app has really helped me.
-- Nic_6793, 2025-06-28

### **--- "Disappointed"
This app starts off really well letting me track my peak flows however for the last month is not shown any of my peak flow readings on what my average reading is. Really disappointed with this app.
-- SOB :(, 2025-04-05

### ***** "Peak Flow"
A great app to monitor my asthma and to have regular scores to show the Asthma Nurse at my reviews.  Thank you so much.
-- CrazyChalks, 2025-02-13

### ****- "Pretty good"
Very easy to use, create a graph for you. Only thing that would be better is if the time reading was taken was clearly displayed
-- bertybobbill, 2025-01-31

### ****- "Okay good ish"
Its really good but its quit difficult to understand
-- Blue/babyblhe, 2025-01-14

### **--- "Very good for self recording but not good for drs"
Very good for recording the peak flow. However no way of pulling off a report to provide to drs with date/time reading 
Which would be great.
-- Jados_Mac, 2024-12-22

### ***** "Great app & easy to use"
Found it very useful for monitoring & recording the lung capacity. Gives me an indication at a glance how it’s performing & also you can put in any information you missed e.g- missed or forgotten flow data. Overall a great app - 5 stars ⭐️
-- Fil-ee-Bee, 2024-11-17

### ***** "So easy to use"
Great for keeping track of your peak flow
-- Debbydoos, 2024-11-13

### ***** "Peakflow"
It’s helping me to see if medication is working
-- G Akerman, 2024-10-25

[View all Peak Flow Diary reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews)





## Peak Flow Diary Available In
- [United Kingdom](https://apptail.io/app/peak-flow-diary-asthma-amZn/united-kingdom)
- [Japan](https://apptail.io/app/peak-flow-diary-asthma-amZn/japan)
- [Germany](https://apptail.io/app/peak-flow-diary-asthma-amZn/germany)
- [United States](https://apptail.io/app/peak-flow-diary-asthma-amZn/united-states)
- [Australia](https://apptail.io/app/peak-flow-diary-asthma-amZn/australia)
- [Russia](https://apptail.io/app/peak-flow-diary-asthma-amZn/russia)
- [Taiwan](https://apptail.io/app/peak-flow-diary-asthma-amZn/taiwan)
- [Ukraine](https://apptail.io/app/peak-flow-diary-asthma-amZn/ukraine)
- [New Zealand](https://apptail.io/app/peak-flow-diary-asthma-amZn/new-zealand)
- [Switzerland](https://apptail.io/app/peak-flow-diary-asthma-amZn/switzerland)
- [Denmark](https://apptail.io/app/peak-flow-diary-asthma-amZn/denmark)
- [Ireland](https://apptail.io/app/peak-flow-diary-asthma-amZn/ireland)
- [Brazil](https://apptail.io/app/peak-flow-diary-asthma-amZn/brazil)
- [India](https://apptail.io/app/peak-flow-diary-asthma-amZn/india)
- [Spain](https://apptail.io/app/peak-flow-diary-asthma-amZn/spain)
- [Austria](https://apptail.io/app/peak-flow-diary-asthma-amZn/austria)
- [Mexico](https://apptail.io/app/peak-flow-diary-asthma-amZn/mexico)
- [South Africa](https://apptail.io/app/peak-flow-diary-asthma-amZn/south-africa)
- [Finland](https://apptail.io/app/peak-flow-diary-asthma-amZn/finland)
- [Norway](https://apptail.io/app/peak-flow-diary-asthma-amZn/norway)
- [Argentina](https://apptail.io/app/peak-flow-diary-asthma-amZn/argentina)
- [Canada](https://apptail.io/app/peak-flow-diary-asthma-amZn/canada)
- [Netherlands](https://apptail.io/app/peak-flow-diary-asthma-amZn/netherlands)
- [Hong Kong SAR China](https://apptail.io/app/peak-flow-diary-asthma-amZn/hong-kong)
- [Slovenia](https://apptail.io/app/peak-flow-diary-asthma-amZn/slovenia)
- [Chile](https://apptail.io/app/peak-flow-diary-asthma-amZn/chile)
- [North Macedonia](https://apptail.io/app/peak-flow-diary-asthma-amZn/north-macedonia)
- [Malaysia](https://apptail.io/app/peak-flow-diary-asthma-amZn/malaysia)
- [Nigeria](https://apptail.io/app/peak-flow-diary-asthma-amZn/nigeria)
- [Peru](https://apptail.io/app/peak-flow-diary-asthma-amZn/peru)
- [Philippines](https://apptail.io/app/peak-flow-diary-asthma-amZn/philippines)
- [Pakistan](https://apptail.io/app/peak-flow-diary-asthma-amZn/pakistan)
- [Poland](https://apptail.io/app/peak-flow-diary-asthma-amZn/poland)
- [Portugal](https://apptail.io/app/peak-flow-diary-asthma-amZn/portugal)
- [Romania](https://apptail.io/app/peak-flow-diary-asthma-amZn/romania)
- [Sweden](https://apptail.io/app/peak-flow-diary-asthma-amZn/sweden)
- [Singapore](https://apptail.io/app/peak-flow-diary-asthma-amZn/singapore)
- [United Arab Emirates](https://apptail.io/app/peak-flow-diary-asthma-amZn/united-arab-emirates)
- [Tunisia](https://apptail.io/app/peak-flow-diary-asthma-amZn/tunisia)
- [Türkiye](https://apptail.io/app/peak-flow-diary-asthma-amZn/turkey)
- [Uzbekistan](https://apptail.io/app/peak-flow-diary-asthma-amZn/uzbekistan)
- [Vietnam](https://apptail.io/app/peak-flow-diary-asthma-amZn/vietnam)
- [Thailand](https://apptail.io/app/peak-flow-diary-asthma-amZn/thailand)
- [Armenia](https://apptail.io/app/peak-flow-diary-asthma-amZn/armenia)
- [Azerbaijan](https://apptail.io/app/peak-flow-diary-asthma-amZn/azerbaijan)
- [Belgium](https://apptail.io/app/peak-flow-diary-asthma-amZn/belgium)
- [Bulgaria](https://apptail.io/app/peak-flow-diary-asthma-amZn/bulgaria)
- [Belarus](https://apptail.io/app/peak-flow-diary-asthma-amZn/belarus)
- [China](https://apptail.io/app/peak-flow-diary-asthma-amZn/china)
- [Colombia](https://apptail.io/app/peak-flow-diary-asthma-amZn/colombia)
- [Czechia](https://apptail.io/app/peak-flow-diary-asthma-amZn/czechia)
- [Dominican Republic](https://apptail.io/app/peak-flow-diary-asthma-amZn/dominican-republic)
- [Algeria](https://apptail.io/app/peak-flow-diary-asthma-amZn/algeria)
- [Ecuador](https://apptail.io/app/peak-flow-diary-asthma-amZn/ecuador)
- [Estonia](https://apptail.io/app/peak-flow-diary-asthma-amZn/estonia)
- [Egypt](https://apptail.io/app/peak-flow-diary-asthma-amZn/egypt)
- [France](https://apptail.io/app/peak-flow-diary-asthma-amZn/france)
- [Greece](https://apptail.io/app/peak-flow-diary-asthma-amZn/greece)
- [Hungary](https://apptail.io/app/peak-flow-diary-asthma-amZn/hungary)
- [Indonesia](https://apptail.io/app/peak-flow-diary-asthma-amZn/indonesia)
- [Israel](https://apptail.io/app/peak-flow-diary-asthma-amZn/israel)
- [Iceland](https://apptail.io/app/peak-flow-diary-asthma-amZn/iceland)
- [Italy](https://apptail.io/app/peak-flow-diary-asthma-amZn/italy)
- [South Korea](https://apptail.io/app/peak-flow-diary-asthma-amZn/south-korea)
- [Kuwait](https://apptail.io/app/peak-flow-diary-asthma-amZn/kuwait)
- [Kazakhstan](https://apptail.io/app/peak-flow-diary-asthma-amZn/kazakhstan)
- [Lebanon](https://apptail.io/app/peak-flow-diary-asthma-amZn/lebanon)
- [Latvia](https://apptail.io/app/peak-flow-diary-asthma-amZn/latvia)

---

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