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🌬️ Breathe Better, Live Smarter — Your Personal Respiratory Coach
The Nascool Peak Flow Meter delivers highly accurate PEF and FEV1 measurements using a pressure differential sensor, meeting ATS ERS WRIGHT standards. Its portable, durable design requires no calibration and supports multiple users, including adults and children over 6. With an easy-to-use LCD display and a companion asthma diary app for manual tracking, it empowers users to monitor and manage respiratory health effectively. The complete package includes the meter, manual, and asthma diary paper, making it an essential tool for asthma sufferers, athletes, and anyone invested in lung health.





| Best Sellers Rank | #4,327 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Flowmeters |
| Customer Reviews | 4.3 out of 5 stars 699 Reviews |
A**R
Perfect
Works perfectly and easy to use.
M**K
great
great.
Z**E
No Bluetooth capability
Will not sync to my phone. No Bluetooth capability. I must manually enter. Easy to use and overall good.
W**D
Great compact device!
As a respiratory therapist, I've used a number of peak flow meters- this one is amazing and great for home use. Small, easy to use and no moving parts. It's easily cleaned and stored, with an easy to read screen. Perfect for travel and carrying to work or school.
C**T
Helps monitor respiratory health
This is a great tool for monitoring my respiratory status and provides more information than a peak flow alone.
S**N
Nascool
Not what I thought it was. Don't know if it's good or bad. Have it to the reuse store.
D**L
Bluetooth by séance, apparently
The meter itself seems capable of producing plausible readings, but the advertised Bluetooth experience is a small consumer-electronics fever dream. My unit is labeled SMPF-3C. The ePEF app has Bluetooth permission, the iPhone’s Bluetooth is working, the meter is powered on, and I followed the supplied instructions. The result: no connection, no Bluetooth symbol on the device, and no transferred measurements. The values visible in the app were entered manually. The app keeps offering “Bluetooth sync” while also reporting “Device disconnected,” which is a little like a hotel advertising room service and then handing you a grocery list. There is no clear pairing procedure, no obvious way to activate Bluetooth on the meter, and no documentation that adequately explains whether this exact model even contains the feature. Maybe I received the wrong variant. Maybe the radio is defective. Either way, customers shouldn’t have to conduct a forensic investigation to discover whether a prominently advertised feature exists. The meter may be usable as a basic standalone device. As a connected device, mine is going back.
P**R
A Good Product But Not What I was Looking For
It was the wrong product for me. It is best for people with breathing conditions like asthma. I returned it.
K**D
Good
Nice device
V**.
Muy bien medidor
Excelente aparato, descargué la app y aunque no se puede conectar x Bluetooth pones la medición y sirve muy bien
A**A
device wrong results
i have bought this device for my son he has asthma,It is showing always wrong results and i have tried so many times to connect to my phone but cannot find my phone.... i dont know i think its a waste of money and time i will try to return this device
D**Z
Requiero urgente de la factura
El aparato funciona bien, pero requiero una factura para comprobar ante el seguro de gastos médicos pero no puedo generarla. Necesito su ayuda
Trustpilot
2 weeks ago
3 weeks ago