4iiii
4iiii Innovations Inc. Health & Fitness iPhoneiPadiPod touchApple Watch
4iiii is a free Health & Fitness app for iPhone and iPad by 4iiii Innovations Inc. Requires iOS 17.6. Updated October 21, 2026.
- Price
- Free
- on the App Store
- Size
- 70 MB
- Age 4+
- Updated
- Oct 21
- 2026 · v4.0.0
Screenshots
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
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| 4iiii | – | Free | October 21, 2026 | |
| Bluetooth Heart Rate Monitor++ | 4.4 / 5 (3,693) | Free | Oct 21, 2026 | Compare |
| MOTTIV: Run & Triathlon Plans | 4.8 / 5 (71) | Free | Jul 24, 2024 | Compare |
| Saturday: Pro Fuel & Hydration | 5.0 / 5 (155) | Free | Oct 24, 2026 | Compare |
| Sonar - Health & Performance | 4.6 / 5 (336) | Free | Jul 22, 2026 | Compare |
| MySwimPro: #1 Swim Workout App | 4.5 / 5 (5,944) | Free | Oct 17, 2026 | Compare |
| HYBRD: Get Stronger & Faster | 4.8 / 5 (782) | Free | Oct 15, 2026 | Compare |
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