PEFLog user instructions

Using PEFLog is easy and it supports you in ensuring your asthma is under control. Use your asthma meter according to instructions and then save the provided values into PEFLog asthma tracker app.

A peak flow meter is an inexpensive, portable, handheld device used to measure how well air moves out of the lungs. Measuring and monitoring your peak flow using the meter is an important part of managing asthma.

Basically there are just three simple steps in managing asthma. Use your PEF meter according its instructions to get the results and save them to PEFLog and inspect results at any time.

Important! The data is stored into the device only and it's a good practice to make a backup occasionally, so that you can restore it any time e.g. in case you lost your device or if you just want to transfer the data to another device. The data is controlled only by you and nobody else can access it and we don't share it with 3rd parties. The report can be stored to the cloud by you and you can control what data is being reported and who else can access it via web browser.

Tip! It is easy to print the report with PC when you send it to yourself and then open and print it with your PC. This way you can also create a PDF file from the report.

Save the PEF values

Set the three values provided by PEF meter into PEFLog. You can also provide additional information like e.g. occasion (work, travel…) and other comments in order to figure out if certain occasions correlate with a PEF values.

  • Blow three consequent times to the peak flow meter
  • Set three results in the application and press Save before medication
  • Optionally, if you’re diagnosing asthma then do following after the previous step
    • Take the prescribed medication and wait 15-20mins (Note! 15min timer may be useful reminder)
    • Blow three consequent times again and then set three results in PEFLog and press Save after medication
  • Repeat every morning and evening at the same time and additionally during the day when needed

Check the report

PEFLog reports provides invaluable information about asthma status. There is lot of important information available about asthma e.g. by Asthma and Allergy Foundation of America

The application draws the chart of the measurements and indicates alarming daily variation and alarming bronchodilatation (difference with and without medication) with red colour. It’s easy to check and share the report any time (for instance after the monitoring period).

You can scroll the report left and right in order to see more details. The report that you can share includes the chart, additional information and detailed results. Note! Bronchodilatation is calculated then when the time between blows with and without medicine is less than one hour.

In order to take a deeper look at the report and share it, you can rotate the device and turn into a landscape mode. Landscape mode is optimised for viewing the report and it occupies whole screen. The share button on the top right corner allows you to share the report.

There are also more time ranges available for the report. They can be selected when pressing Report button when already in the Report tab.

Modify monitoring periods

Single tapping of titles collapses (closes) and uncollapses (opens) the monitoring periods. The arrow on the right side indicates if the period is collapsed or not. Double tapping the item will allow you to edit the details of the PEF result.

In order to remove the PEF result, you can swipe the item left. Note! You can remove the title that start the monitoring period after you have deleted items underneath.

When you want to start a new monitoring period then press 2 seconds the item that starts the period. The period will last as long as you start a new one.

After using PEFlog or Systolic for some time you’ll end up having a long list of readings. It often makes sense to group readings according to the monitoring periods. The most meaningful readings are typically the most recent ones and the readings appear in chronological order in the log-tab. In order to jump to the most recent readings, i.e. to the bottom of the list, you can just press the Log-button when already in the log-tab. In order to jump back to the top of the list, you can press the button in the top right corner.

Backup and Restore

All data that you save is stored into your device only. You might need to transfer your data to another device in case you are switching to a new one or just in case if you happen to lose your device. In order to have the data available for another device, then Backup and Restore function does the trick for you.


Select Backup and restore from the drawer menu (top left corner). Then press Backup button and send the link, that PEFLog creates, to yourself via email or so. PEFLog uploads a backup file to the server and replaces the older backup file in case it already exists.


When using another device, you can restore the data using the link you sent to yourself earlier. Copy the link to the clipboard from the email first. Then open the Backup and restore functionality from the drawer menu and keep Restore button pressed so that you can paste the link there. After you press Done, then the PEFLog attempts to restore the data. PEFLog downloads the backup file from the server. The entries that have the same date and time are then updated and new entries are appended to the device without removing already existing data.