# B3 Runtime vs Relentless Training

B3 Runtime and Relentless Training are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

B3 Runtime ships an update every 3 weeks, Relentless Training every 5 weeks. The most recent releases landed on October 3, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | B3 Runtime | Relentless Training |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (6 ratings)](https://appshunter.io/ios/app/relentless-training/id6503916787/reviews)** |
| Number of ratings | — | **6** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Monetization | — | Free |
| Size | 44 MB | 181 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [B3 Innovation AB](https://appshunter.io/developer/1736498082) | [LeCount Personal Training LLC](https://appshunter.io/developer/1750343673) |

## What reviewers say

### B3 Runtime

[App page](https://appshunter.io/ios/app/b3-runtime/id6479606796)

**Features:** macOS Compatibility

**In-app purchases:** none


### Relentless Training

[App page](https://appshunter.io/ios/app/relentless-training/id6503916787)

Access personalized workout programs and track your fitness journey. Monitor workouts, nutrition, habits, and measurements with coach guidance. Join communities for motivation and earn badges for achievements.

**Highlights:** Personalized workout programs, Workout and meal tracking, Habit and measurement tracking, Coach messaging, Digital communities, Milestone badges, Wearable device integration

**Features:** Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is B3 Runtime free?

B3 Runtime is free to download, with no in-app purchases.

### Is Relentless Training free?

Relentless Training is free to download, with no in-app purchases.

### Do B3 Runtime or Relentless Training have ads?

Neither B3 Runtime nor Relentless Training shows ads.

### Which is updated more often, B3 Runtime or Relentless Training?

B3 Runtime ships an update every 3 weeks, and Relentless Training every 5 weeks. Most recently, B3 Runtime was updated on October 3, 2026 and Relentless Training on October 4, 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.*