PEF Log asthma tracker makes Peak Expiratory Flow monitoring and assessment and reporting super easy.

All data is stored into your own account so that you have full control of it and we don't share your data with anybody else.

PEF Log asthma monitor supports treatment decisions, it works as an asthma assessment helper, and it can be used for asthma self monitoring and reporting with ease.

It helps asthma doctors, nurses and users workload by automating and digitising manual phases to export, transform, present and send data that is needed for asthma monitoring and diagnosis. PEFLog understands bronchodilatation and it creates comprehensive reports.

I'm a father of four and found traditional PEF monitoring boring, time consuming and error prone. I tried to use pen and paper with my children but it didn't really work out. I creating snappy PEFLog app for myself and for my children in order to make asthma tracking as easy and fast as possible for everybody.


- Save Peak Flow readings with ease
- Edit readings and monitoring periods
- A timer reminds about the next blow after having medication
- Comprehensive report and charts
- Daily variation, period's variation and average variation
- Bronchodilatation (impact of the medication)
- Reference PEF (calculated based on age, height and gender)
- Personal best (calculated or manual)
- Colour zones (green, yellow, red)
- Alarming variations indicated in red
- The report is easy to send out
- Dark and light colour themes
- Languages: English, Chinese, Finnish, Norwegian, German
- Available for other platforms too

DISCLAIMER. This applications is not a medical device nor its substitute. You must use your own certified peak flow meter and consult a healthcare professional about its correct usage. This application provides information as is and should not be treated as a medical advice. You should always consult your healthcare professional in your health related issues and appropriate usage of the information.

Thank you for these kind words and five stars!

*****Mar 8, 2019
For me is the best app for tracking my daughter's asthma. It's tell me when her asthma is going worst before she notice it. Very easy to use and you can send the peak flow chart directly to the doctor.

*****Mar 4, 2019
I'm completely satisfied with the app, I can store everything exactly as my doctor asks me. Top App.

*****Feb 1, 2019 A Must Have Peak Flow App
Love this app does what it says on the tin. Easy to use, so glad of this app, worth every penny. Nice one developer

*****Dec 12, 2018 Simple to use
Tried a few apps before settling on this. Easy to use with nice, clear, graphs. Does all I need.

*****Aug 11, 2018 Brilliant app and so easy to use
I’ve tried a few asthma PEF diary apps and this is by far the best. Nice graphics, easy to use and easy to understand.

*****May 5, 2018 Excellent for those under assessment
I wanted an easy to use app that just plotted readings before and after meds and this fits the bill perfectly. It’s very easy to use and has room for notes if you want to add them. It’s much better than the basic sheet I was given by the nurse and shows up plainly how effective the meds are. Well worth paying for, thank you!

What’s New

Version 3.2.1

Welcome to PEFLog3. We have improved the log page and it is now possible to group readings by month or year or based on your custom grouping. You can also record just a medication when you don't do PEF puffs. If you like PEFLog, please leave a review in AppStore. Thanks for choosing PEFLog!

Ratings and Reviews

2.3 out of 5
3 Ratings

3 Ratings

lylfox ,

Unable to create a report

Look to be a good app but it’s only letting me log my results. Doesn’t take me to reports or any of the other pages supposedly used in this app. Unless I have access to daily report it’s useless to me. And now I’m getting Bad Element. Not liking his at all

Developer Response ,

Thanks for feedback and I'm so sorry for the inconvenience. I'd suggest to upgrade to the latest version 2.3.4 and use the app in portrait mode first.

cleo kali ,


Entered in information and went to different screens. Then the app gets stuck and loses the information. Then app won’t open. Remove the app and redownload it and it doesn’t the same thing. What a waste

Developer Response ,

I’m so sorry to hear the app didn’t work for you. I'd suggest to upgrade to the latest version 2.3.4. The application has been improved quite a lot since older versions.

App Privacy

The developer, Pasi Kivikangas, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Identifiers
  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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