Smart Peak Flow Meter

Smart Peak Flow Meter

(45 customer reviews)


Smart Peak Flow turns your phone into your own personal asthma assistant. It tells you how to best manage your asthma after every blow.

  • Measures peak flow conveniently.
  • Daily tips after each blow.
  • Asthma attack warnings.
  • Works on all phones. Can be used with headphone jack adapters.
  • Free app & free delivery worldwide. 30 day money back guarantee.
  • Suitable for adults and children above 5 years old.


Get started

A quick video on how to get started with your Smart Peak Flow meter.

Doctor's thoughts

"This is a great alternative to written paper diaries.
You can easily download the app and get accurate measurements.
Also, those who are less tech-savvy get feedback on the accuracy of their measurements."

- Dr. Andras Szantho, Pediatric Pulmonologist

What's in the box?

Smart Peak Flow Meter
Reusable Mouthpiece
Carry Bag
User Manual

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45 reviews for Smart Peak Flow Meter

  1. Allison Galt

    This is a brilliant device

  2. Andy McGreal

    Brilliant! It was so quiet I had to look to make sure it was working! Very light, can carry in a pocket or small bag. Can use USB via mains power adapter or a powerbank. Very versatile and never let me down!

  3. Derek Porro

    Easy to use. Highly recommended. Chart clear to understand and empowers me to take control and to make adjustments in medications well in advance and avoid an asthma attack.

  4. Sharon Beaumont

    Brilliant device. Bought it as my last asthma attack came on so quickly it was scary. However, after using this device on a daily basis it gave me an amber warning and advised I took my blue inhaler even though I didn’t have any major symptoms at the time. you can clearly see from the app that my asthma isn’t under control properly so I can now show the readings to my GP and hopefully get sorted.

  5. Ramon Mila Ferrer

    4 stars

  6. Anonymous

    5 stars

  7. Sandra Delachaise (verified owner)

    it some time work I have two incase one brakes

  8. HUDOKLIN IRENA (verified owner)

    Veri conviniant for younger astmatics

  9. Anonymous (verified owner)

    I think every asthmatic should have this. This has breathed new life into my previously sporadic asthma care. Start the app, plug in & blow, result explained & logged in the diary-done! Also, an option to make a note & view the graph. The only nit pick I have, is that the clear mouth piece could do with a slightly tighter fitting.

  10. dan bayley (verified owner)

    Great little gadget, nice app too, but can’t figure out how to get my data out of it.

  11. Karen Carmichael

    At first I had trouble with the app giving measurements when I hadn’t blown. (due to certain types of lights) This has now been fixed. Easily fits into my bag, allowing me to take a reading anywhere, anytime. My GP was impressed when I went in for a review and I was able to show her how my peak flow measurements had been since the start of the year by showing her the graph. My only complaint is that the mouthpiece to the meter falls off very easily.

  12. Zita

    Perfect, easy to use

  13. Shaban Shabanov

    It’s a great way to keep track
    Down side-readings can’t be deleted

  14. Angela P.

    Simple to use and recorded automatically – ideal.

  15. Wilhelmine Koenig

    Very fast reliable delivery in perfect packaging.

  16. Lee Mackenzie

    Great Device and App

  17. Lesdia


  18. Natalie Barnes

    I have a teenage son who has asthma – albeit only with a cold (virus) which can be quite unpredictable.
    I was looking for an app to document his peak flows and came across your product which is a fabulous innovative idea. I have a typical teenager who thinks normal graphing of peak flows is boring. Consistent peak flow monitoring has therefore lacking. Anything to do with technology and he’s interested.
    He also needs to be more involved in his asthma management. The app and smart peak flow metre have allowed him greater engagement with his chronic condition. I’m a registered nurse and love the use of modern technology and health innovation.

  19. Motoki Tokifuji

    5 for recording my peak flow ellegantly.
    -1 for not working on Pixel3 XL via microphone to usb-c adaptor.

  20. Margaret A. (verified owner)

    Efficient and compact

  21. Martin Goodman (verified owner)

    Needs getting used to as if you are wheezy it sometimes doesn’t register

  22. Grace (verified owner)

    Great device easy to use. Needs a direct source of light above you or it gives some very peculiar readings! The device takes your highest resting not an average and you cant add any readings from a manual PFM. It definitely makes tracking my PF easier and PDF of results can be shared directly to my doctors which is fab!

  23. Susan F. (verified owner)

    An easier way to keep track. Only problems are – need to be in a well lit room at night, think it gave me too high a personal best to start with as I’ve had to reduce it to make it more realistic and I could do with a narrower mouthpiece, the doctor gave me a child’s peak flow meter as my jaw doesn’t open enough. Otherwise very happy – even happier when I get green!!

  24. Anna Sargent

    Brilliant – easily set up, and works very well – this is going to make a great deal of difference to my monitoring and control of my asthma. Very clever, compact lightweight plug-in propeller, very clear app. Haven’t used it long enough to need to print a graph yet.

  25. Stuart Simpson

    Keeping a record of the peak flow. Great to use app records each peak flow and you can print it off.

  26. Sam

    Since most recent app update, it works well. I do get some variability with differing amount of room lighting – however, this is expected. I’m a health care professional that has tried using this device.

  27. Samwise

    Since most recent app update, it works well. I do get some variability with differing amounts of room lighting – however this is expected.

  28. Ashley F.

    Great for logging your lung capacity. The product is very easy to use, literally plug in once you have downloaded the app. Really pleased with it. I am logging my results twice daily to give to the Drs (UK). Occasionally I start to blow before the fan has stopped running and the read is incorrect but it is user error (impatience) rather than anything else.

  29. Kevin Wilkinson

    Easy to use and seems very accurate.

  30. Lynne Dearlove

    I really like this. Having been surprised that there is not an official NHS asthma app, I came across this device and tracking app. The device is easy to use and less cumbersome than the traditional PF meter. Love the fact that the app works out your red, amber and green zones which has made my asthma plan so much easier to implement. Data is clearly presented with personal best PF automatically added (can be manually changed) based on results. It calculates average PF quarterly and yearly. This makes asthma appointments more efficient. Customer service is excellent. I have been informed that the ability to edit notes is coming in future updates. I have also requested a notes section to add an asthma plan in the sub menu. For me, these features would make it a 5* review. Very promising and will be recommending to others with asthma. My asthma is chronic and difficult to manage but the app gives me reassurance that my PF is okay and if in the amber zone it provides an early warning to users to implement the asthma plan to get back on track. I actually feel that my asthma will be manageable now. Thank you!

  31. richard (verified owner)

    Very handy device and app.Seems to measure a little higher than standard UK peak flow,maybe 10 – 15%.
    Would recommend.

  32. Angela (verified owner)

    Very pleased. Prompt delivery. Well packaged. The app is really clear and checking my peak flow twice a day and having a record on the chart has helped me manage my asthma

  33. Amazon Customer

    Essential for anyone with Asthma!

  34. Jacques D.

    With Smart Peak Flow I now know how to adjust the prescribed medication and so avoid hospitalization. Before, whenever my asthma became too severe, I would have to go to the hospital for shock treatment – I no longer need to go through all that ! Many thanks go to Smart Peak Flow.

  35. Zdenko

    Ingenious piece of technology, one of those few gadgets, that are not only called „smart“ but trully are smart. Usage of the device definitely benefits from a technical insight, but for most users and standard situations will work without extra hassle. If there might be unclarities, there are always very competent and responsive people to help at the SPF. Trully excellent, dedicated team! Thanks!

  36. Keith Brightwell (verified owner)

    Very pleased it’s easy to use and understand and if you have question you get a reply same day

  37. Barney Sloan

    Amazing customer service. After receiving a Smart Peak Flow Meter that didn’t work I contacted the seller. They were amazing! Once we tried all options regarding the app, they replaced the item (which works perfectly) and gave me a full refund! Thanks Captium for your assistance.

  38. Ian Meredith

    Needs a big puff.

  39. Caroline

    Easy to use. Was very easy to use. Makes managing my asthma easy. Can so spot when my asthma is getting worse. And I can take it anyway small and compact.

  40. Mike A

    Works well, very easy to make regular measurements, compact. Needs good amount of light above it to function properly but not a big problem.

  41. Amanda Watch

    I have 2 children 10 &9 years with asthma. I have down loaded this to my phone for my youngest and to my 10 year olds tablet. Both are connected to my emails. Had to use 2 different email addresses. My only issue is that it would be easier if I could of had on app but profile for both children. Hopefully in the future.

  42. Marie Wilson

    User friendly and much more intuitive than traditional analogue peak flow meters. The reminder feature is a bonus.

  43. Jairus Daughter

    Genius. Awesome gadget. Much more accurate than my analogue could ever be. Some anomalies but catching a good or bad breath or day would cover that.

  44. Zanzi

    Works great. Nifty tool and a sleek app. Works very well. The tiniest peak flow meter, even when including the adapter for the lightning cable. Worth buying the little elegant sensor.

  45. Keziah Southwick

    This has been a life saver for my 5 year old who cant always understand his symptoms and im only going on the little information i know.
    He does sometimes have a little bit of trouble sealing his lips around the mouth peice but we get there.

    We were lucky enough to win ours in a competition but honestly if we only had it for a weeks trial i would have already payed for it.
    Attaches to my phone which is handy the alarm is helpful as it always comes with a cheering on quote to ask him to challenge himself. Also the badges are great for pushing he to keep it up although would be great to get a few more as seems along way between each badge but on whole i love it.

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