Comparison

FitRest Sleep, Heart Rate, HRV vs Training Stack

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

FitRest Sleep, Heart Rate, HRV

This app transforms your HealthKit data into actionable wellness insights. It tracks sleep, stress, heart rate, HRV, and workouts, offering personalized recommendations. Compatible with various devices, it provides a comprehensive view of your health.

Highlights
  • Sleep quality tracking
  • Stress monitoring and analysis
  • Heart rate and HRV analysis
  • Workout tracking and analytics
  • Hydration and vitals logging
  • Recovery and readiness scoring
Features
Read full description

FitRest is the ultimate health and fitness tracker for Apple Health, transforming your HealthKit data into actionable wellness insights. Track sleep quality, monitor stress levels, analyze heart rate and HRV, log hydration and vitals, track workouts, and stay active. Compatible with Apple Watch, Fitbit, Garmin, Oura Ring, Whoop, and other devices through HealthKit. Why FitRest Is Different • Actionable health insights, not just raw numbers • Complete wellness app: sleep tracker, recovery & readiness analysis, stress monitor, heart rate analysis, activity tracker, and workout analytics • Works with Apple Watch and all HealthKit-compatible fitness trackers • Ad-free, privacy-first Heart Health & Sleep Tracking • Recovery & Readiness scoring with personalized activity suggestions • Resting heart rate monitoring with daily trends • Heart Rate Variability (HRV) analysis for recovery tracking • Blood Oxygen (SpO₂) tracking during sleep • Advanced sleep quality scoring with personalized analysis • Sleep pattern comparisons and trend tracking • Respiratory rate and sleep disruption monitoring • Enhanced hypnogram visualization for sleep stages • Sleep efficiency analysis with activity correlation • Sleep chronotype and circadian rhythm analysis Stress Management & Monitoring • Daily stress monitoring with scoring • 14-day trend visualization to spot patterns and improvements • See how HRV, heart rate, sleep, and activity impact your stress levels • Personalized stress reduction tips Activity & Workout Tracking • Beautiful home screen widgets • Comprehensive steps analytics with 30-day trends • Widget variants: Compact view, Hourly chart, Weekly trends • Activity rings with detailed progress tracking • Steps, calories, active minutes, distance monitoring • Workout analysis with heart rate zones and intensity scoring • Interactive route maps with heart rate zone visualization • Shareable workout images with custom titles • MET Scores for performance insights Health Logging & Vitals • Water Intake Tracker with smart daily hydration goals • Blood Glucose Monitor with meal context tracking • Caffeine Tracker with daily limit warnings • Blood Pressure Log with status classification • Track trends over days, weeks, and months • Easily log water, caffeine, blood pressure, and blood glucose from convenient home screen widgets, and set reminders to stay on track Achievements & Motivation • Earn fitness badges for milestones and personal records • Streak monitoring and visual celebrations • Daily notifications for goal completion Apple Watch App • Quick health logging from your wrist • Guided breathing with haptic feedback • 7-day HRV & sleep trends with insights • Real-time heart rate monitoring with live zones Intelligent Health Dashboard • Recovery trends with HRV, heart rate, and sleep combined analysis • Comprehensive health score and daily readiness • Actionable recommendations for better balance • BMI & BMR tracking with calorie breakdowns • Track your daily sunlight exposure to improve sleep, mood, and circadian rhythm. Smart Features • Export health data in CSV, PDF or text format • Customizable workout and bedtime reminders • Context-aware health suggestions • Goal celebrations and motivational insights Perfect For • Fitness enthusiasts tracking workout performance • Health-conscious individuals monitoring sleep and heart health • Athletes optimizing training with HRV and recovery metrics • Apple Watch users seeking detailed health analytics • Anyone wanting comprehensive wellness tracking FitRest transforms your health data into meaningful progress. Track sleep, monitor heart health, analyze workouts, log vitals, earn achievements, and build healthier habits with actionable insights. Disclaimer: For fitness and wellness purposes only. Not a medical device. Consult healthcare professionals for medical advice. Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy: https://fitrestapp.com/privacy

About

Training Stack

This app consolidates running, strength training, and short exercise bursts into a single platform. It allows users to import training plans, track progress with detailed analytics, and integrate with health data. Personalize your fitness journey with customizable plans and shareable progress reports.

Highlights
  • Import running and strength training plans
  • Track running, strength, and exercise snacks
  • Apple Health integration for automatic syncing
  • Detailed running and strength analytics
  • Customizable strength training with 400+ exercises
  • Widgets and Live Activities for quick access
  • Weather integration for optimized runs
Features
Read full description

Training Stack is the all-in-one fitness app for runners who also lift. Track your running, strength training, and quick exercise snacks—all in one place. RUNNING & TRAINING PLANS - Create multi-week running plans with 11 workout types including Easy, Tempo, Intervals, Long Run, and more - Import plans from Markdown, CSV, ChatGPT, or Claude - Track plan progress with skip/unskip options and recovery scheduling - Add run notes capturing intent, effort level, and conditions APPLE HEALTH INTEGRATION - Sync running workouts automatically from Apple Health - Track distance, pace, calories, heart rate, elevation, and cadence - Link your scheduled workouts to completed runs - Capture weather conditions at workout time RUNNING ANALYTICS - Weekly, monthly, and all-time mileage tracking - Year-over-year comparisons to see your progress - Fastest paces for mile, 5K, and 10K distances - Heart rate analysis including zones, HRV, and VO2 Max - Training load ratios and running streaks STRENGTH TRAINING - Build multi-week strength plans with flexible splits (Full Body, Upper/Lower, Push/Pull/Legs) - 400+ built-in exercises organized by muscle group and equipment - Track sets, reps, weight, RPE, and failure - Support for supersets, circuits, drop sets, and time-based exercises - Personal records and 1RM estimation - Rest timer with haptic feedback EXERCISE SNACKS - Schedule 1-5 minute exercise bursts throughout your day - Create custom sessions with multiple exercises - Track streaks and build consistent movement habits - Quick logging from notifications - 10 color themes to personalize your snacks WIDGETS & LIVE ACTIVITIES - Home screen widgets showing weekly mileage and charts - Lock screen widgets for quick stats - Live Activities during strength workouts and exercise snacks - Dynamic Island support WEATHER INTEGRATION - Real-time conditions and forecasts - Running conditions score (0-100) based on temperature, wind, and precipitation - Plan your runs around the best weather windows SHARE YOUR PROGRESS - Beautiful shareable graphics for runs and weekly summaries - Multiple themes optimized for Instagram, Twitter, and more - Customize what stats to include - Export your health profile for AI coaching integration HYBRID TRAINING - Link running and strength plans together - See your combined daily schedule - Smart conflict resolution for busy training days Built for runners who want to get stronger without juggling multiple apps. Training Stack brings your entire fitness routine into one streamlined experience. https://www.apple.com/legal/internet-services/itunes/dev/stddevelopereula/

Screenshots

FitRest Sleep, Heart Rate, HRV4 screens
Training Stack4 screens

Verdict

The call

The clearest difference is update cadence: FitRest Sleep, Heart Rate, HRV at every 5 days against Training Stack's every 3 months. FitRest Sleep, Heart Rate, HRV also leads on monetization model (free vs freemium) and ratings volume (128 vs 6). Training Stack's advantage is rating (5.0 vs 4.8). On price, review sentiment, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. FitRest Sleep, Heart Rate, HRV sells 3 in-app purchases, starting at $4.99 per month and Training Stack sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Training Stack holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: FitRest Sleep, Heart Rate, HRV has 128 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 94% of FitRest Sleep, Heart Rate, HRV's written reviews are positive against 100% of Training Stack's.

UpkeepUpdate frequency

FitRest Sleep, Heart Rate, HRV ships an update every 5 days, Training Stack every 3 months. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 5 level
FitRest Sleep, Heart Rate, HRV versus Training Stack: the parameters behind the verdict, then further details
ParameterFitRest Sleep, Heart Rate, HRVTraining Stack
PriceFreeFree
Rating4.8 (128 ratings)5.0 (6 ratings) — better
Positive reviews94.4% of reviews100.0% of reviews — better
Number of ratings128 — better6
Update frequencyEvery 5 days — betterEvery 3 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, Apple Watch — betteriPhone, Apple Watch
Requires iOS17.0 — better26.2
Further details — not scored
Size84 MB26 MB
Age rating4+4+
DeveloperTaohidul IslamRaven Howard

Customer experience

FitRest Sleep, Heart Rate, HRV

All ratings128 ratings
Positive93.8%
Neutral3.1%
Negative3.1%
Written reviews144 reviews
Positive94.4%
Neutral2.8%
Negative2.8%

Training Stack

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

FitRest Sleep, Heart Rate, HRV

Subscriptions2
  • Monthly Premium$4.991 Month
  • Annual Premium$24.991 Year
One-time1
  • Lifetime Premium$49.99
3 purchases

Training Stack

Subscriptions2
  • Pro Stacker - Monthly$4.991 Month
  • Pro Stacker - Annual7 Days trial$19.991 Year
One-time1
  • Pro Stacker - Believer$99.99

Questions

Is FitRest Sleep, Heart Rate, HRV free?
FitRest Sleep, Heart Rate, HRV is free to download, with in-app purchases available.
Is Training Stack free?
Training Stack is free to download, with in-app purchases available.
Which has better reviews, FitRest Sleep, Heart Rate, HRV or Training Stack?
Training Stack is rated higher. FitRest Sleep, Heart Rate, HRV averages 4.8 out of 5 from 128 ratings, while Training Stack averages 5.0 from 6 ratings.
Do FitRest Sleep, Heart Rate, HRV or Training Stack have ads?
Neither FitRest Sleep, Heart Rate, HRV nor Training Stack shows ads.
Which is updated more often, FitRest Sleep, Heart Rate, HRV or Training Stack?
FitRest Sleep, Heart Rate, HRV ships an update every 5 days, and Training Stack every 3 months. Most recently, FitRest Sleep, Heart Rate, HRV was updated on October 30, 2026 and Training Stack on October 24, 2026.

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