# FitRest Sleep, Heart Rate, HRV vs Training Stack

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.

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.

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.

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.

## The numbers

| Metric | FitRest Sleep, Heart Rate, HRV | Training Stack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (128 ratings)](https://appshunter.io/ios/app/fitrest-sleep-heart-rate-hrv/id6751546749/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/training-stack/id6757607761/reviews)** |
| Number of ratings | **128** | 6 |
| Positive reviews | 94.4% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 3 months |
| Monetization | **Free** | Freemium |
| Size | 84 MB | 26 MB |
| Requires iOS | **17.0** | 26.2 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Taohidul Islam](https://appshunter.io/developer/1835698446) | [Raven Howard](https://appshunter.io/developer/1867818110) |

## What reviewers say

### FitRest Sleep, Heart Rate, HRV

[App page](https://appshunter.io/ios/app/fitrest-sleep-heart-rate-hrv/id6751546749)

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:** Family Sharing, Apple Watch app, iPhone Duo support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $4.99 | per month |
| Annual Premium | $24.99 | per year |
| Lifetime Premium | $49.99 | one-time |

**What reviewers like**

- 🚀 Absolutely amazing!
- 👍 Smart, Clean & Super Useful!
- 👍 Truely Impressive Tracker
- 👍 A Complete Wellness Companion — Highly Recommend!
- 👍 Everything I want from a sleep, fitness, and recovery app — in one place.


### Training Stack

[App page](https://appshunter.io/ios/app/training-stack/id6757607761)

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:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Stacker - Monthly | $4.99 | per month |
| Pro Stacker - Annual | $19.99 | per year |
| Pro Stacker - Believer | $99.99 | one-time |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*