4iiii vs FITIV Pulse
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
4iiii
Connect and configure your 4iiii power meters and heart rate monitors. Record workout data, update device firmware, and even turn your Apple Watch into a cycling head unit. Track power, cadence, heart rate, and more while riding.
- Connects to power meters and heart rate monitors
- Records workout data (power, heart rate, cadence, etc.)
- Performs zero offset and firmware updates
- Apple Watch cycling head unit functionality
- Auto-syncs to Strava
- Locates power meters with Finder Feature
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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)
FITIV Pulse
This app is a comprehensive health and fitness tracker that monitors workouts, heart rate, sleep, and recovery. It provides actionable insights to help users train smarter and achieve their fitness goals.
- Heart rate zone training
- HRV and recovery tracking
- Sleep monitoring
- Workout tracking for various activities
- Strength training log
- Advanced performance metrics
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TRAIN. RECOVER. ACHIEVE. FITIV is the all-in-one workout and health tracker that helps you train smarter with heart rate zones, HRV, sleep, recovery, and strength. New: connect your Fitbit, including Fitbit Air, through Google Health and see everything in one place. Track workouts, heart rate, calories, recovery, sleep, stress, training load, and strength training in one powerful performance app for Apple Watch, Fitbit (including Fitbit Air), Garmin watches, Bluetooth heart rate monitors, WHOOP, Oura, AirPods Pro (3rd generation), and Powerbeats Pro 2. NEW: FITBIT AIR AND GOOGLE HEALTH • Connect your Fitbit or Fitbit Air through Google Health • Sync workouts, steps, sleep, heart rate, weight, and vitals into FITIV • Save your FITIV workouts and weight back to Google Health • Health Data Sources: see which app and device recorded each metric, turn sources on or off, and rank your sleep sources HEART RATE MONITOR & ZONE TRAINING • Live heart rate monitoring during workouts • Heart rate zone tracking for cardio, endurance, and interval training • Resting heart rate insights • Live heart rate from Bluetooth monitors, AirPods Pro (3rd generation), and Powerbeats Pro 2 • Broadcast heart rate to Peloton, Zwift, Concept2, and compatible gym equipment • Live coaching with real-time voice feedback during workouts RECOVERY, SLEEP & READINESS Recovery drives performance. FITIV helps you understand when to push and when to recover. • Sleep tracking with overnight metrics and vitals • HRV tracking and recovery insights • Stress tracking and daily strain monitoring • Training readiness, recovery score, and recovery trends WORKOUT TRACKING FOR EVERY WAY YOU TRAIN • Workout tracking for cardio, gym, intervals, and endurance sessions • HIIT timer and interval workout support • GPS workout maps with pace and heart rate overlays • Advanced workout metrics, including training load and VO2 • Live streaming workout data from Apple Watch to iPhone STRENGTH TRAINING & GYM LOG • Log reps, sets, weight, and training volume • Workout templates with folders, or start an empty session in one tap • Smart exercise search that understands shorthand like RDL • 44 new exercises and rewritten how-to instructions • Track personal records, strength progress, and progressive overload WEIGHT & GLP-1 MEDICATION TRACKING Lose the weight, not the muscle. Experts recommend strength training while on GLP-1 medications, and FITIV is built to track both. • Log doses for Zepbound, Mounjaro, Ozempic, Wegovy, and other GLP-1 injections and pills • Dose reminders, titration schedules, and estimated medication levels • Daily side effect check-ins to spot patterns • Weight trend and goals, with progress per medication, and a shareable milestone when you reach your goal ADVANCED PERFORMANCE & HEALTH METRICS • Training load tracking with TRIMP, TSS, and active calorie-based load • Advanced running metrics, including stride length, running power, and vertical oscillation COMPATIBLE DEVICES & INTEGRATIONS • Apple Watch and iPhone • Fitbit (including Fitbit Air) through Google Health • Garmin watches • Bluetooth heart rate monitors: Polar, Scosche, COOSPO, Myzone, and more • AirPods Pro (3rd generation) and Powerbeats Pro 2 • WHOOP, Oura, and other connected fitness platforms • Google Health, MyFitnessPal, Strava, TrainingPeaks, Lose It!, Peloton, Zwift, and Spotify • Support for widgets, complications, Live Activities, and Dynamic Island Upgrade to FITIV Pro to unlock advanced recovery analytics, training readiness, deeper metrics, and structured workout features. SUBSCRIPTION & TERMS FITIV Pro offers monthly and yearly auto-renewing subscriptions, charged to your Apple ID. Cancel anytime in your Apple ID settings at least 24 hours before renewal. Terms of Service: https://fitiv.com/terms-conditions Privacy Policy: https://fitiv.com/privacy-policy
Screenshots
Verdict
The clearest difference is review sentiment: FITIV Pulse at 76% against 4iiii's 11%. FITIV Pulse also leads on update cadence (fortnightly vs every 3 months). 4iiii's advantage is in-app purchases (none vs 10). On price, ads, monetization model and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. FITIV Pulse sells 9 in-app purchases, starting at $1.99 per month. 4iiii asks for nothing beyond the download.
4iiii ships an update every 3 months, FITIV Pulse fortnightly. The most recent releases landed on October 23, 2026 and October 27, 2026 respectively.
| Parameter | 4iiii | FITIV Pulse |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.6 (13K ratings) — better |
| Positive reviews | 10.9% of reviews | 75.8% of reviews — better |
| Number of ratings | — | 13K — better |
| Update frequency | Every 3 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Apple Watch |
| Requires iOS | 17.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 70 MB | 496 MB |
| Age rating | 4+ | 12+ |
| Developer | 4iiii Innovations Inc. | MotiFIT Fitness Inc. |
Customer experience
4iiii
FITIV Pulse
User reviews
4iiii
From App Store reviewsWhat we love
- ✅ Firmware updates work smoothly when functioning
- 🔋 Battery status display
- ⚙️ Zero offset calibration functionality
- 🎯 Successfully pairs with power meters (when working)
- 📱 Simple and straightforward UI for basic functions
Room to improve
- 🐛 Cannot detect multiple power meters simultaneously
- 🐛 Frequent connection failures and disconnections
- 🐛 App crashes and freezes regularly
- 🐛 Data fields clear themselves unexpectedly
- 🐛 Firmware updates fail mid-process
FITIV Pulse
From 13K App Store ratingsWhat we love
- 🚀 Awesome app!
- 👍 Great tool for tracking levels of exertion during training
- 👍 Keeps you motivated and able to track progress easily
- 👍 Flawless Apple Watch integration
- 👍 Comprehensive metrics and data analysis
Room to improve
- 🐛 Frequent disconnects from Apple Watch
- 🐛 Inaccurate calorie tracking
- 🐛 Buggy GPS tracking and mapping
- 🐛 Inconsistent syncing and data loss issues
- 🐛 Intrusive and frequent review prompts
Bugs and requests
4iiii
Reported bugs
21 issues- Cannot pair multiple power meters - only recognizes one at a time
- App fails to detect power meters that other apps find easily (Garmin, Wahoo)
- Dual-sided power meter only shows one side (usually left)
- Firmware update failures brick power meters permanently
- Login credentials not accepted despite being correct
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- Password reset emails never arrive
- App crashes on startup and during use
- Data fields randomly clear after being filled
- Bluetooth connection drops unexpectedly during rides
- Ride recording stops without notification
- FIT files become corrupted
- Battery percentage displays incorrectly (shows 49% constantly, 0% when charged)
- Zero offset calibration fails with error messages
- App unresponsive on device settings screen
- Update notifications loop continuously
- Registration screen doesn't scale properly on smaller screens
- App won't open after updates
- Incompatible with iOS 13, iOS 16
- Workout data incomplete or not recorded
- App keeps running in background draining battery
- Offset detection inconsistent (sometimes left, sometimes right)
Requested features
12 requests- Support for multiple power meters on single device
- Spanish language support
- Japanese language support
- Optional notifications instead of mandatory
- Improved bikeindex.org integration
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- Better UI/UX design modernization
- Offset number display for calibration verification
- ANT+ sensor support for non-4iiii devices
- Workout recording and history features
- Strava integration
- Optional account creation (local-only functionality)
- Improved error messages and feedback
FITIV Pulse
Reported bugs
5 issues- Frequent disconnects from Apple Watch during workouts
- Inaccurate calorie tracking and data reporting
- Issues with GPS tracking and mapping, including incorrect distance and route recording
- Syncing problems leading to data loss and inconsistencies
- Crashes and performance issues following recent app updates
Requested features
8 requests- Add support for more workout types (e.g. rowing, CrossFit)
- Improve customization options for workouts and data displays
- Implement a more robust and reliable GPS tracking system
- Add the ability to edit workout details and duration
- Improve syncing and data integration with other fitness apps
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- Provide more detailed sleep and recovery tracking
- Implement a more intuitive and streamlined user interface
- Reduce the frequency and intrusiveness of review prompts
In-app purchases
4iiii
No in-app purchases
FITIV Pulse
- FITIV (1 Month)$1.991 Month
- FITIV$4.991 Month
- FITIV2 variants$9.991 Year
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- FITIV Pro Monthly$9.991 Month
- FITIV7 Days trial$29.991 Year
- FITIV1 Year trial$29.991 Year
- FITIV Pro Yearly7 Days trial$59.991 Year
- PRO Membership$4.99
- PRO Membership$9.99









