# SmartBarbell by JuggernautAI vs Relentless Running

The clearest difference is update cadence: SmartBarbell by JuggernautAI at every 6 days against Relentless Running's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. SmartBarbell by JuggernautAI sells 1 in-app purchase, starting at $4.99 per month and Relentless Running sells 2 in-app purchases, starting at $14.99 per month. Whichever you choose, the download price is not the number that matters.

SmartBarbell by JuggernautAI ships an update every 6 days, Relentless Running fortnightly. The most recent releases landed on October 30, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | SmartBarbell by JuggernautAI | Relentless Running |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (7 ratings)](https://appshunter.io/ios/app/smartbarbell-by-juggernautai/id6479318757/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Fortnightly |
| Monetization | Free with in-app purchases | — |
| Size | 62 MB | 223 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Juggernaut Apps](https://appshunter.io/developer/1627775482) | [Relentless Method AB](https://appshunter.io/developer/1091241290) |

## What reviewers say

### SmartBarbell by JuggernautAI

[App page](https://appshunter.io/ios/app/smartbarbell-by-juggernautai/id6479318757)

This app uses your phone's camera and machine learning to track barbell velocity during lifts, providing objective data to improve your training. It analyzes key lifts like squats and deadlifts, offering insights into bar path and perceived exertion.

**Highlights:** Camera velocity tracking, Bar path analysis, Objective RPE measurement, Track major lifts (Squat, Bench, Deadlift, OHP), Video upload and analysis, Integration with JuggernautAI App

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SmartBarbell Monthly | $4.99 | per month |


### Relentless Running

[App page](https://appshunter.io/ios/app/relentless-running/id6804181621)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Relentless Running Monthly | $14.99 | per month |
| Relentless Running Annual | $99.99 | per year |


## Frequently asked questions

### Is SmartBarbell by JuggernautAI free?

SmartBarbell by JuggernautAI is free to download, with in-app purchases available.

### Is Relentless Running free?

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

### Do SmartBarbell by JuggernautAI or Relentless Running have ads?

Neither SmartBarbell by JuggernautAI nor Relentless Running shows ads.

### Which is updated more often, SmartBarbell by JuggernautAI or Relentless Running?

SmartBarbell by JuggernautAI ships an update every 6 days, and Relentless Running fortnightly. Most recently, SmartBarbell by JuggernautAI was updated on October 30, 2026 and Relentless Running on October 29, 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.*