# RelentlessPerformanceTraining vs ISSCA AI

The clearest difference is in-app purchases: ISSCA AI at none against RelentlessPerformanceTraining's 1. ISSCA AI also leads on update cadence (every 3 weeks vs every 14 months). RelentlessPerformanceTraining's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 17.6). On price and ads there is nothing between them.

Both are free to download. RelentlessPerformanceTraining sells 1 in-app purchase, starting at $19.99 per month. ISSCA AI asks for nothing beyond the download.

RelentlessPerformanceTraining ships an update every 14 months, ISSCA AI every 3 weeks. The most recent releases landed on October 6, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | RelentlessPerformanceTraining | ISSCA AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/relentlessperformancetraining/id6446181677/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 3 weeks** |
| Monetization | Freemium | — |
| Size | 8 MB | 72 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Arlington Keith Callies](https://appshunter.io/developer/1676515658) | [Longevity AI LTD](https://appshunter.io/developer/1629208591) |

## What reviewers say

### RelentlessPerformanceTraining

[App page](https://appshunter.io/ios/app/relentlessperformancetraining/id6446181677)

This app promotes the importance of movement and functional training to prevent injuries. It incorporates various disciplines like yoga, calisthenics, and kettlebell training to enhance mobility and overall physical well-being.

**Highlights:** Functional training philosophy, Injury prevention focus, Yoga integration, Calisthenics guidance, Kettlebell training, Mobility enhancement

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Relentless PT | $19.99 | per month |


### ISSCA AI

[App page](https://appshunter.io/ios/app/issca-ai/id6759975891)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RelentlessPerformanceTraining free?

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

### Is ISSCA AI free?

ISSCA AI is free to download, with no in-app purchases.

### Do RelentlessPerformanceTraining or ISSCA AI have ads?

Neither RelentlessPerformanceTraining nor ISSCA AI shows ads.

### Which is updated more often, RelentlessPerformanceTraining or ISSCA AI?

RelentlessPerformanceTraining ships an update every 14 months, and ISSCA AI every 3 weeks. Most recently, RelentlessPerformanceTraining was updated on October 6, 2026 and ISSCA AI on October 5, 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.*