Mio Slice is one of the first wearable to capture your heart rate data and translate it into PAI, Personal Activity Intelligence. The system gives you a single, personal score, showing how much activity you need to stay healthy.

Slice also includes sleep tracking, calories burned, smartphone notifications and more—all in a stylish water-resistant wrist band operated by one simple button.

How PAI Works

Mio Slice syncs with your PAI app on iPhone and Android so you get the latest details of your daily and weekly PAI scores.
Get the full picture of how your heart performs in each heart rate zone and see where you earn the most PAI points.
See your steps, distance, calories burned, and sleep quality directly on your Slice and your iPhone or Android.

It's Simple

Maintain a score of 100 PAI or higher for maximum health benefits. No matter the activity or exercise, PAI is the only number that matters.

It's Personal

PAI is calculated based on your heart rate data and personal profile over a 7-day rolling period, making it unique to you. Work out more on some days and less on others.

It's Scientific

PAI is founded upon data from the HUNT Study—one of the world’s largest health studies conducted over a 25-year period with more than 45,000 participants.

It's meaningful

PAI is based on heart rate, one of the most accurate and meaningful way to measure your body’s response to physical activity. PAI counts all physical activity that increases your heart beat.

Mio Slice All Day Heart Rate and Activity Tracker (Black/Large)

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In the box

Mio Slice All Day Heart Rate and Activity Tracker (Black/Large)