Smart Peak Flow Meter (Bluetooth)

(88 customer reviews)

£64.60 £59.60

Your asthma made easy.
Turn your phone into your own personal asthma assistant. Bluetooth included.


Recommended by doctors and asthma patients.
  • Bluetooth included.
  • Suitable for ages 5 and above.
  • Free UK delivery.
  • 60-day returns guarantee.

101 in stock


A video on how it works

Your peak flow made easy

All readings automatically charted
Check yourself anytime anywhere
Explanation of all your readings
Direct sharing with your Doctor

Recommended by doctors

Dr. Andras Szantho,
Lung Specialist

"Smart Peak Flow measures your peak flow, but also a percentage compared to your last best blow. This comparison is invaluable when trying to work out if your asthma is worsening or not."
Prof. Krzysztof Buczyłko,
Director of Allergology

"I recommend Smart Peak Flow as regular peak flow readings help me assess my patients. I know whether the medications I prescribe actually work."

What's in the box?

Smart Peak Flow Meter
Bluetooth Adapter
Reuseable Mouthpiece
Carry Bag
User Manual

Frequently asked questions

Will it work on my phone?
Yes. It works on all phones. You can use a bluetooth or headphone jack adapter, if your phone doesn't have a headphone jack.
How long is delivery?
We aim to deliver within 2 to 3 working days.
Can it be used for children?
Can be used by any ages 5 or above. If they are less than 5, but can use it with proper technique, they can use it. Video above shows proper technique.
How do I return it?
Can be returned anytime within 60 days for a full refund. Contact, if you want to start a return.

Additional information


Bluetooth Bundle, No Bluetooth Bundle

88 reviews for Smart Peak Flow Meter (Bluetooth)

  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. BEN ABBES Mohammed


  44. 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.

  45. 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.

  46. Kirstie Daws

    The meter and app are fantastic, really simple to use and it means I can have my peak flow readings to hand all the time, which really helped recently when I visited the doctor and he asked for them. If I hadn’t been using this device and app I wouldn’t have been able to recall them so would recommend this to everyone.

  47. Nikki Race

    Easy to use even for kids , my son was never keen on using his peak flow meter and we were never that great at recording the results. With the introduction of technology he is interested and keeping track is effortless!

  48. 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.

  49. Jonathan

    A good way of monitoring fluctuations in peak flow but the functionality relays very much on good light levels and it consistently reads my peak flow much higher than it’s real value.

  50. Charlotte Eades-Willis

    Brilliant peice of kit so easy and simple, really helped

  51. Emma Edwards

    Works well and records asthma data. Only works in good light though. This is much better than the old peak flow gadgets

  52. Darren Brown

    Could maybe incorporate a full Asthma plan that could be reviewed by Asthma Nurse on a yearly basis as opposed to general guidelines…?

  53. Dawn McDonald

    Easy to use. Reproducible readings. Helps track changes.

  54. christine stone


  55. Rae Green

    The device works well, and the app is easy to set up and use. What a brilliant way to monitor and control asthma! Thank you so much for this brilliant, game changing device.

  56. Ben Jammin

    The smart peak flow is awesome. Easy set up and after a couple of teething problems (user error) has been amazing. An Easy way to track my peak flow

  57. David Keenan (verified owner)

    Hi bought the smart peak flow meter and it is brilliant very easy to use and very easy to download the app, easy to read all readings that is saved on iPad and phone , Royal Mail lost the item that was sent to me, but smartpeak flow sent another strait away and sent me a blue tooth adapter to help me ! MANY THANKS TO SMARTPEAKFLOW

  58. Kerry Dix

    Fantastic product helps me keep track with minimal effort over the moon how simple it is and has helped me keep track of my bad days

  59. Angela Berglund

    The Smart Peak Flow device and app are great. Makes keeping track of my asthma so much easier.

  60. Natalie Green-wood

    Simple to use, works great

  61. John Davies

    Great app and great device i keep with me all the time

  62. Kirstie S

    Its so easy to use and measures it way more accurately than my old one! The asthma nurse was really impressed too ??

  63. Kerry Dix

    Fantastic product helps me keep track with minimal effort over the moon how simple it is and has helped me keep track of my bad days

  64. Angela Berglund

    The Smart Peak Flow device and app are great. Makes keeping track of my asthma so much easier.

  65. Natalie Green-wood

    Simple to use, works great

  66. John Davies

    Great app and great device i keep with me all the time

  67. Kirstie S

    Its so easy to use and measures it way more accurately than my old one! The asthma nurse was really impressed too ??

  68. Dawn Turnbull

    Brilliant device

  69. Claire Bolton

    Great way to record peak flow accurately on yr mobile phone.

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  77. Ian Cairns

    This little device is a big improvement on the dumb devices you are usually given. Firstly it records all the measurements so you can easily see from the app whether the trend is up or down. It is also more accurate. I compared my smart peak flow readings with professional readings from the hospital and they were pretty close whereas the mechanical meter I’d got from the doctors was way out.

  78. June Benton

    I use before I take my inhalers in the morning. Finding this very useful can keep an eye on my asmtha without worrying about my symptoms at this vulnerable time with the virus.

  79. Hannah Crook

    Fabulous Device, worth investing in. A very thoughtful idea for asthmatics

  80. Kellie Waller

    Brilliant Having being diagnosed with severe and difficult asthma with etopy and being on biologics, this handy device and app means i can keep check of my peak flow and what actions i need to take. It means i dont have to carry a bulky peak flow around everywhere i go!

  81. Kaiden Bedwell

    Great concept and execution. Well done!

  82. helen hookway

    Love it.. I can tell if I’m using my inhaler correctly.. I’m finding it so much easier to look after my asthma.. My son is also using it too.. Its brilliant. I would definitely recommend that everyone one has this for their asthma.

  83. Dawn Turnbull

    Very easy to use

  84. Kerry Toney

    Easy to set up easy to use an really helps with controllin my asthma its a must have would not be without my smart meter now well done on a fab item smart peak flow xxx

  85. Sarah Samuel

    This is absolutely brilliant! It’s such a game changer & so much easier carrying around a smart peak flow as opposed to a big normal one so to speak! I have severe asthma so need to keep everything near ALWAYS!This app has been brilliant & is spot on accurate,my only regret? That i didn’t know about this sooner!! Thank you so much!

  86. Karen Sargent

    Easy to use and set up. We are still trying to get my sons treatment right and this will be a great record to show his Asthma Team when we go back. Great visual aid to help my son on track.

  87. Jessica Hernandez

    Great product, really helpful info to give to my doctor too.

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