FITTR ONE vs NTRL
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FITTR ONE
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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Introducing FITTR ONE - a cutting-edge smart ring and app that monitors every vital health parameter and helps you become fitter, healthier and happier. The Hart Ring isn’t just smart and stylish; it’s all you need for tracking every single health parameter. Paired with the app, you get an all-inclusive tool that accurately monitors your key fitness metrics, and gives you timely expert advice on how to improve them. Over time, this means better health and longevity. Powered by FITTR, India’s biggest online fitness community with over 300,000+ success stories and more than 5 million community members globally. **Here’s a glimpse of what FITTR ONE has to offer** Your daily health performance, at a glance Detailed tracking of Steps, Distance, Calories, Sleep, HRV, Skin Temperature, Women’s Health. Includes Quality of Life, Activity, Stress, Heart Rate, SpO2 Health data and reports Expert advice and guidance to help you improve each parameter Sleep Get detailed data like Sleep Duration, Sleep Stages (Awake, REM, Light & Deep Sleep, Naps), Sleep Efficiency, Sleep Latency, Average Heart RAte, Average SpO2, and Average HRV Heart Rate Evaluates your heart health with detailed graphs SpO2 Tracks fluctuations in SpO2 throughout the day and night HRV Tracks variations/fluctuations in your heart rate as you go about your activities Stress Monitors your stress levels and shares tips to reduce stress Skin Temperature Detects changes in skin temperature. Helps you track fluctuations with the help of daily, weekly and monthly reports. Women’s Health (Only visible if gender set as female) Tracks menstrual cycle and helps determine ovulation. For pregnant women, tracks key parameters right up to delivery date. How to correctly wear your FITTR HART Ring For best performance and accurate readings, we recommend wearing your HART Ring on the index finger of your non-dominant hand. Middle and ring fingers work too, if that’s what you prefer. Just make sure that the ring fits securely and comfortably around the base of your finger - not too loose, not too tight. Note: the ring’s sensor should face the palm side of your finger and not the top. How to use the FITTR ONE app After activating the ring, please pair with the FITTR ONE app to start using. Not a medical device This ring is not a medical device and should not be used as a substitute for professional medical judgement. It is not designed or intended for use in the diagnosis of disease or other conditions, or in the cure, mitigation, treatment, or prevention of any condition or disease. Please consult your healthcare professional prior to making any decisions related to your health.
NTRL
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NTRL is your complete fitness companion designed to help you achieve your health and wellness goals with personalized guidance. Whether you're looking to lose weight, build muscle, improve your lifestyle, or stay consistent, NTRL connects you with expert coaches who create customized workout and nutrition plans based on your goals. Features: • Personalized workout programs • Customized meal plans • Progress tracking with visual analytics • Weekly check-ins with your coach • Body measurement tracking • Secure subscription management • PDF download of daily plans Stay accountable, monitor your progress, and reach your goals with professional coaching through NTRL.
Screenshots
Verdict
FITTR ONE and NTRL are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Neither carries in-app purchases, so what you see is what you pay.
FITTR ONE ships an update every 10 days, NTRL every 9 days. The most recent releases landed on October 15, 2026 and October 5, 2026 respectively.
| Parameter | FITTR ONE | NTRL |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (13 ratings) — better | — |
| Positive reviews | 73.5% of reviews | — |
| Number of ratings | 13 — better | — |
| Update frequency | Every 10 days | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 16.2 | 15.1 — better |
| Further details — not scored | ||
| Size | 271 MB | 44 MB |
| Age rating | 12+ | 17+ |
| Developer | SQUATS | Tintu Vasudevan |
Bugs and requests
FITTR ONE
Reported bugs
10 issues- Activity report generation fails after workouts
- Activity tracking is inaccurate, especially during runs and gym workouts
- App has syncing issues, requires ring to be close to phone
- App randomly logs out
- Charging issues with the ring
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- Battery life drastically reduced after firmware updates
- Sleep tracking not working consistently or accurately
- Login issues
- Report generation fails for activities like Badminton or Weight training
- App shutters and shudders on iPhone 15
Requested features
7 requests- Improve activity tracking accuracy
- Enhance integration with Apple Health
- Option to hide or remove unused app sections (e.g., Nutrition)
- Allow adding activities after they are completed
- Display activities in a list format (e.g., walking - 23 min)
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- More explanation on stress management
- Push notification for low battery (<20%)
NTRL
Not enough reviews yet to summarise bugs or requests.
In-app purchases
FITTR ONE
No in-app purchases
NTRL
No in-app purchases









