iOS iPhone Healthcare & Fitness


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Use the 4iiii app to connect and configure your Viiiiva Heart Rate Monitor and PRECISION Bike Power Meter devices. Receive real-time data from both devices at the same time.

Use Viiiiva to:
Bridge ANT+ sensors through your iPhone's Bluetooth Smart (BLE) connection to see ANT+ data live on your phone.
Configure your settings for Sportiiii using the Viiiiva Bluetooth bridge.
Use Viiiiva to bridge ANT+ devices like a foot pod (Striiiide), bike speed and cadence (Riiiide) or bike power meters to iPhone over Bluetooth Smart!

Get live Bike Power and Cadence data over BLE and/or ANT+
PRECISION Info view displays the device name, ANT+ id, and Firmware version. You can also change your PRECISION name or upgrade your PRECISION firmware from this view.

Log your runs, rides, and other activities to .FIT files for uploading to other services with or without GPS data!

NOTE: Only Apple devices that support, GPS (for accurate locations services) and Bluetooth Smart (required for connectivity to Viiiiva and Sportiiii), will have full functionality of the 4iiii app. This includes iPhone 4s, iPhone 5, iPhone 5c, iPhone 5s. iPhone 6, and iPhone 6 Plus. The app will run on iPad 3 and newer and all iPad minis, connect to PRECISION, Viiiiva and Sportiiii but will not have detailed location services when doing workout.

* Continued use of GPS running in the background can dramatically decrease battery life.

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What's New

- Enhancements to firmware upgrade process
- Improved restore factory calibration option for PRECISION
- resolve Bike Power Slope configuration problem

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