FITTR ONE

FITTR ONE

The Smarter Fitness Solution

12 ratings
66 reviews
Free

Details

  • Released
  • Updated
  • February 8, 2024
  • August 21, 2026

Features

FITTR ONE screenshot #1 for iPhone
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About

This smart ring and app combination tracks vital health metrics like sleep, heart rate, and stress. It provides personalized expert advice to help users improve their fitness and overall well-being. The system offers detailed insights into daily health performance and long-term trends.

Vital health parameter monitoring
Detailed fitness metric tracking
Personalized expert advice
Sleep stage analysis
Heart rate and SpO2 tracking
Stress and skin temperature monitoring
Women's health tracking
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What users say

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+1

What's New in FITTR ONE

2.2.9

August 21, 2026

Enroll with a coach for 1:1, face-to-face guidance to understand your metrics and work on them together Chat and call access with your coach is now part of every coaching plan Bug fixes and performance improvements

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User reviews

Great Concept, Poor execution

I had high expectations from the HART Ring, but unfortunately my experience has been disappointing.

From the beginning, I have faced frequent sync issues, charging problems, battery drain, and an unstable app experience. The app often requires me to force close and reopen it just to sync with the ring. That’s not a solution—it should simply work.

Battery life has deteriorated significantly. Initially, the ring lasted around 6–8 days, but now I have to charge it almost every day. The charging case is also unreliable, and I often have to place the ring back multiple times and repeatedly open and close the lid before it starts charging.

The ring was even replaced once under warranty, but the replacement developed similar issues. I’m still following up with customer support, yet there has been no satisfactory resolution.

A health wearable should provide a seamless, reliable experience and peace of mind. Instead, I’ve spent more time troubleshooting than actually using the product.

I hope HART improves both the hardware and software experience because, in its current state, I cannot recommend it.
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Consistent performer, Highly recommend

I’ve been using this ring since March, and it’s been a fantastic experience so far. The heart rate tracking is accurate and consistent, and I haven’t run into a single glitch or issue in the five months I’ve worn it daily. Battery life has held up well, and it’s comfortable enough that I forget I’m wearing it.

What I appreciate most is the reliability-no random disconnects, no syncing issues, just consistent performance day after day. It’s become a seamless part of my routine for tracking my health.

Highly recommend if you’re looking for a dependable fitness ring that just works.
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After sales service good. Product not satisfactory.

The 3 star is given for the after sales service. Its been 1 year since is purchased hart ring. And have already had replacements twice within a year due to malfunctioning on ring. And this 3rd ring is also not running properly. Don’t know the ring hardware is not good or the app is not supporting it. But , not satisfied at all.
HR data not consistent, hrv data not consistent, sleep data started malfunctioning. Not sleeping reads as sleep. And sleep peacefully reads as awake.
Activity reading is also not consistent. And the worst part is no conclusion/solution regarding the problem .

But service is always ready to help and solve the problem. So 3 star to Hart ring is only because of that. Product 0 star.
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A complete, data-driven app for fitness and health tracking

What I like about HART App is that it brings my entire health profile into one ecosystem. It tracks daily metrics like steps, sleep, calories, resting heart rate, and blood pressure, while also combining body composition data and blood work to give a much deeper picture of overall health. It even helps me understand how my body is aging and how my health is progressing over time.

Another feature I find very useful is calorie tracking. It makes it easy to monitor how much food I am consuming, how much I am burning, and how my calorie deficit is affecting fat loss. This makes the whole fitness journey much more data-driven instead of relying on guesswork. Rather than checking multiple apps and reports separately, I can see everything in one place and make better decisions based on actual numbers. Overall, it feels like a smart and complete health companion rather than just a basic tracking app.
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Hart_Ring_My_Fitness_Buddy

I am using Fittr ring since almost a year now. It has immensely helped for my fitness & weight loss goals. It helps me track my calories, TDEE, my sleep & my Bp too (Amazing feature which was recently added). It shows my resting heart rate which has improved a lot since last year(around 50). All this data motivates me to continue & aggravate my fitness journey. This has been the best fitness related purchase for me. It’s much better than any smart watch since you can wear it 24 hrs unlike any smart watch. Kudos to Fittr team & JC.
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Developer apps

User experience

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Reported Bugs

10 issues

Activity report generation fails after workouts

Bug

Activity tracking is inaccurate, especially during runs and gym workouts

Bug

App has syncing issues, requires ring to be close to phone

Bug

App randomly logs out

Bug

Charging issues with the ring

Bug

Battery life drastically reduced after firmware updates

Bug

Sleep tracking not working consistently or accurately

Bug

Login issues

Bug

Report generation fails for activities like Badminton or Weight training

Bug

App shutters and shudders on iPhone 15

Bug

Requested Features

7 requests

Improve activity tracking accuracy

Feature

Enhance integration with Apple Health

Feature

Option to hide or remove unused app sections (e.g., Nutrition)

Feature

Allow adding activities after they are completed

Feature

Display activities in a list format (e.g., walking - 23 min)

Feature

More explanation on stress management

Feature

Push notification for low battery (<20%)

Feature

FAQ

What does the FITTR HART app do?

The FITTR HART app works with a smart ring to monitor various vital health parameters. It tracks daily health performance, provides detailed insights into metrics like sleep, heart rate, SpO2, stress, and skin temperature, and offers expert advice to help users improve their health and fitness.

What are the key features of the FITTR HART system?

Key features include comprehensive tracking of steps, distance, calories, sleep duration and stages, HRV, skin temperature, heart rate, SpO2, and stress levels. It also offers specialized tracking for Women's Health, including menstrual cycle and ovulation prediction.

Is the FITTR HART ring a medical device?

No, the FITTR HART ring is not a medical device. It is designed for general health and fitness tracking and should not be used as a substitute for professional medical advice or diagnosis. Always consult a healthcare professional for any health concerns.

How do I get accurate readings from the FITTR HART Ring?

For optimal performance and accurate readings, it is recommended to wear the HART Ring snugly on the index finger of your non-dominant hand. Ensure the ring fits comfortably and the sensor faces the palm side of your finger. After activation, pair the ring with the HART app to begin tracking.

What kind of health data does the app provide?

The app provides detailed data and reports on your daily health performance. This includes sleep duration and stages, heart rate fluctuations, SpO2 levels, HRV variations, stress monitoring, skin temperature changes, and specific metrics for Women's Health. Expert advice is offered to help interpret and improve these parameters.