Frequently Asked Questions


What if my phone doesn’t have an audio jack port?

You can connect the Smart Peak Flow meter to a smartphone without an audio jack port with a suitable adapter recommended by your phone manufacturer.

For iPhones, we recommend using a genuine Apple Lightning-to-jack adapter.

For Android devices, we recommend the Google Pixel USB-C-to-jack adapter.

The audio port is located at the bottom of my phone. How can I use it better?

With the auto-rotation feature on your smartphone, you can turn your phone upside down and the app screen will auto-rotate so that you can see it when doing your blow tests. Make sure that auto-rotation is enabled on your phone.

If your smartphone has no auto-rotation feature, then we suggest using a 4-pole 3.5mm audio extension cable for the best user experience

My iPhone’s screen does not rotate upside down. How can I fix this?

The upside down auto-rotate feature on the newer iPhone models with a notch has been disabled by Apple (due to Face ID).

We recommend connecting Smart Peak Flow with the Apple Lightning adapter and a 4-pole 3.5mm audio extension cable for the best user experience.

Why does my lightning to audio/headphone jack adaptor not work?

If you are using a non-Apple lightning to audio jack adaptor, the device may not work as expected.

We suggest you purchase a genuine Apple lightning to audio jack adaptor. Click here.

What if the device or app does not work?

If the device does not seem to work as described in the user manual, please send an email to explaining what the issue is.

Which smartphone models are supported?

Smart Peak Flow works on most Android and iOS smartphones, with the exception of Xiaomi smartphones. The app will not install on any Xiaomi smartphone models.

Click here for a list of devices on which the app has specifically been tested by our Team.

Which iOS or Android versions are supported?

For iOS: iOS 10.0 or later versions.

For Android: Android versions 5.0 or later.

(Lollipop, Marshmallow, Nougat, Oreo, Pie)

In which language is the app available?

  • English
  • Traditional Chinese
  • Simplified Chinese
  • French
  • German
  • Hungarian
  • Italian
  • Japanese
  • Polish
  • Portuguese
  • Russian
  • Spanish
  • Turkish
  • Ukrainian

Using Smart Peak Flow

Can children use Smart Peak Flow?


Smart Peak Flow is safe for use for children over 5 years old.

How do I get a copy of my personal Smart Peak Flow user data?

Send an email to and mention that you would like a copy of your user data.

How do I delete my account and personal data?

Send an email to and mention that you would like to delete your account and personal data.

How should I measure my peak flow?

  1. Connect your device to your smartphone and launch the Smart Peak Flow app.
  2. Make sure you’re standing in a well-lit area and that you’re not covering the top window.
  3. Put the device into your mouth beyond your teeth and close your lips to form a seal around the mouthpiece.
  4. Press Start, take a deep breath with your nose and blow as hard and fast as you can out of your mouth.
  5. Read the result on your screen and repeat two more times to get a total of 3 measurements – the app will only save the highest.

    Watch our video guide, or read the section HOW TO MEASURE YOUR PEF VALUE in the User Manual.

How can I download the Smart Peak Flow app?

The app is available for free via the Apple Store and Google Play Store in the local language. You can just search for Smart Peak Flow.

How do I share my peak flow readings with my doctor/carer?

To share your peak flow readings, click on the “share” button near the top left corner of the chart.

Can family members share the device?

No – the device is meant to be used by a single user.

How can I keep my Smart Peak Flow device clean?

We recommend that you clean the mouthpiece and the Smart Peak Flow meter device regularly to maintain the product as it works best when clean. Check the mouthpiece & device turbine after each use by looking at it. Make sure that they are clean and clear of foreign objects or substances.

You can clean both the mouthpiece & device in a bath of luke warm water. Make sure both are dry before using it again.

We also recommend you keep your Smart Peak Flow device & mouthpiece in the carry bag when not using it.

For more information on cleaning, please refer to the section CLEANING AND DISINFECTION in the User Manual.

Product details

Can I purchase Smart Peak Flow in the USA?

Smart Peak Flow is currently not available for sale in the United States, due to pending FDA regulatory approval (expected by Fall 2020).

Samples are available upon request only for Clinical Studies and Healthcare Professionals – click here.

What does the Smart Peak Flow packaging contain?

It contains the Smart Peak Flow meter device that connects to your smartphone via 3.5mm headphone jack, one washable mouthpiece, one carry bag and the user manual.

Is Smart Peak Flow a medical device?

Smart Peak Flow received CE-certification as a Class IIa Medical Device developed according to the latest quality standards.

How long does Smart Peak Flow last?

Smart Peak Flow has a guaranteed lifespan of 2 years under normal usage conditions. Perform cleaning of the device on a regular basis to continuously ensure hygienic and accurate measuring.

User manual

Where can I find the user manual?