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Screenshots

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About 4iiii

The 4iiii app is a valuable tool to get the most out of the features of your 4iiii products and achieve your fitness goals. Using the app, you can connect to your 4iiii power meter (PRECISION 3/3+ models) and your Viiiiva heart rate monitor to both configure and update them. You can record workout data to FIT file format to be later uploaded to your favourite training software. The companion Ride Watch app turns your Apple Watch into a cycling head unit. View power, cadence, heart rate, speed, distance, live while riding. Ride records your workout data to FIT file, and to Apple Fitness for closing your rings. Auto-sync to Strava keeps your activity feed up-to-date on completion of every outdoor or indoor cycling workout. Multi-language: English, Deutsch, Nederlands, français, italiano, にほんご, español. Features include: 4iiii app Supported devices: 4iiii Powermeters, Viiiiva heart rate monitors Record workout data (heart rate, power, cadence, pace, speed, distance, time, laps, calories) Manage stored FIT files, upload to Strava 4iiii Power meters Personalize your device name Pair and unpair dual powermeters Perform zero offset Easy over-the-air firmware updates Note: Available for iOS only (supports only iOS version 17.6 or higher)

What’s new

Version 4.0.0 · Updated October 21, 2026

Multi-language: English, Deutsch, Nederlands, français, italiano, にほんご, español. All-new version of the app features easy management of multiple power meters and overall improved usability.

App privacy

The developer, 4iiii Innovations Inc., reported these privacy practices to Apple.

Data Linked to You

The following data, which may be collected and linked to your identity, may be used for the following purposes:

  • Contact Info: Email Address, Name
  • Location: Precise Location, Coarse Location

Used for: Developer’s Advertising or Marketing, App Functionality

Data Not Linked to You

The following data, which may be collected but is not linked to your identity, may be used for the following purposes:

  • Diagnostics: Crash Data
  • Health & Fitness: Fitness

Used for: Analytics, App Functionality

Alternatives to 4iiii

Looking for apps like 4iiii? Here are 6 similar apps on the App Store. The highest rated is Saturday: Pro Fuel & Hydration (5.0/5), and all 6 are free to download.

4iiii vs. alternatives
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