# Training Stack vs Readiness & HRV by Incredible

The clearest difference is update cadence: Readiness & HRV by Incredible at every 10 days against Training Stack's every 3 months. Readiness & HRV by Incredible also leads on monetization model (free vs freemium) and ratings volume (79 vs 6). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Training Stack sells 3 in-app purchases, starting at $4.99 per month and Readiness & HRV by Incredible sells 4 one-off in-app purchases. 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: Readiness & HRV by Incredible has 79 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 100% of Training Stack's written reviews are positive against 96% of Readiness & HRV by Incredible's.

Training Stack ships an update every 3 months, Readiness & HRV by Incredible every 10 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | Training Stack | Readiness & HRV by Incredible |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/training-stack/id6757607761/reviews)** | [4.8 (79 ratings)](https://appshunter.io/ios/app/readiness-and-hrv-by-incredible/id6761727962/reviews) |
| Number of ratings | 6 | **79** |
| Positive reviews | **100.0% of reviews** | 95.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 10 days** |
| Monetization | Freemium | **Free** |
| Size | 26 MB | 200 MB |
| Requires iOS | 26.2 | **18.0** |
| Devices | iPhone, Apple Watch | iPhone, Apple Watch |
| Age rating | 4+ | 12+ |
| Developer | [Raven Howard](https://appshunter.io/developer/1867818110) | [Nucleon AS](https://appshunter.io/developer/1439780833) |

## What reviewers say

### 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 |


### Readiness & HRV by Incredible

[App page](https://appshunter.io/ios/app/readiness-and-hrv-by-incredible/id6761727962)

This app analyzes your Apple Watch data to provide a daily readiness score, explaining what your HRV, sleep, and heart rate mean for your day. It also includes built-in strength training logging and tracks key health vitals with trends.

**Highlights:** Daily readiness score from Apple Watch data, Explanation of HRV, sleep, and heart rate, Built-in strength training logger, Tracks 6 key health vitals with trends, Fitness and training load analysis, Apple Watch companion app

**Features:** Apple Watch app, iPhone Duo support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $2.99 | one-time |
| Medium Tip | $4.99 | one-time |
| Large Tip | $9.99 | one-time |
| Incredible Tip | $19.99 | one-time |


## Frequently asked questions

### Is Training Stack free?

Training Stack is free to download, with in-app purchases available.

### Is Readiness & HRV by Incredible free?

Readiness & HRV by Incredible is free to download, with in-app purchases available.

### Which has better reviews, Training Stack or Readiness & HRV by Incredible?

Training Stack is rated higher. Training Stack averages 5.0 out of 5 from 6 ratings, while Readiness & HRV by Incredible averages 4.8 from 79 ratings.

### Do Training Stack or Readiness & HRV by Incredible have ads?

Neither Training Stack nor Readiness & HRV by Incredible shows ads.

### Which is updated more often, Training Stack or Readiness & HRV by Incredible?

Training Stack ships an update every 3 months, and Readiness & HRV by Incredible every 10 days. Most recently, Training Stack was updated on October 31, 2026 and Readiness & HRV by Incredible on October 31, 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.*