PAI (Personal Activity Intelligence) is a revolutionary new system that turns your heart rate data into a single, personal score, showing how much activity you need to stay healthy.

PAI’s scientifically validated algorithm is based on your personal profile and heart rate data from all-day activity and workouts to calculate your PAI score. The goal is simple: keep your PAI score at 100 or above to live a healthier, longer life*.

PAI is the most accurate and meaningful activity metric:

It’s Simple: PAI is easy to understand, providing a single score to track.

It’s for Everyone: PAI tracks all activity as it is based on your heart rate, and it also works for all fitness levels because PAI is personalized to the individual.

It’s Meaningful: PAI provides feedback on your activity, showing the health effects so that you know if you are staying active enough.

It’s Scientific: PAI is based on one of the world’s largest health studies. Research has shown that maintaining a PAI score at 100 or above can reduce the risk of cardiovascular disease by up to 25% and extend lives by an average of 5 years.

It’s Adaptive: PAI adapts as you progress. The more fit you are, the harder it will be to earn PAI, keeping you appropriately challenged.

It’s Flexible: Your PAI score is based on the past 7 days activity, providing flexibility around your busy lifestyle.

If you have questions or need help to configure your device with Mio PAI, please visit or email

For more information, see the Privacy Policy and Terms of Use.

*To learn more about the science and research behind PAI, visit

What's New

Version 2.1.6

Thank you for all your feedback. Below is a list of updates and key fixes in this release.
*Remember to always update your app and SLICE firmware for the best experience.

• Now available in Simplified Chinese!

Customer Reviews

2.8 out of 5

10 Ratings

10 Ratings

Okay app


Pros: My favorite things about the app is the chart of your heart rate throughout the day. Also keeping a record of the amount of sleep and which stages of sleep you slept in were pretty cool.

Cons: My biggest issue with the app is that it can only keep 7 days worth of data. I kinda wish it could keep a permanent record of everything even if the data had to be moved to an Archived tab or something. Also the Home tab I don’t find very useful. Other than the amount left on the battery, all the other data can be found on the Slice itself. I spend most of my time on the Day Details tab.


Developer Response

Hi James.
Thanks for your review and feedback.
We don't have an date yet, but we're working on a history feature.
Please email if you have questions or comments.
Mio Support Team
1 877 770 1116

Great app for what I want


I have worn Mio gear for a few years now and been pretty critical. Today that has changed. The mio pai app works very well. Like most heart rate monitor apps, not perfect but if you want the most accurate, comprehensive daily activity report out there, mio pai is great!
I use the slice and it connects well and gives me accurate results all day long and even sleep results without needing to set the app for sleep. Good stuff!

Developer Response

Thanks for your review, we really appreciate it!
Please email if you have any further feedback or questions.
Thanks again,
Mio Support Team

New update


The most recent update is causing some issues with the accuracy between the Mio slice and what shows up on my phone. The app is not responsive after it opens up. After a few seconds of the app and the mio slice trying to “sync up”, all previous data from the week disappears. Please fix this soon!

Developer Response

Thanks for your review and sorry to hear that.
Try force closing the app and re-opening. We're working on an app update we plan to release as soon as possible.
Mio Support Team


Physical Enterprises Inc.
172.3 MB
Health & Fitness
Requires iOS 9.3 or later. Compatible with iPhone, iPad, and iPod touch.
English, Russian, Simplified Chinese
Age Rating
Rated 4+
© Mio Global (Physical Enterprises Inc.)


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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