# HST Log vs JuggernautAI

The clearest difference is review sentiment: JuggernautAI at 73% against HST Log's 13%. JuggernautAI also leads on rating (4.8 vs 3.1) and update cadence (every 4 days vs monthly). HST Log's advantage is monetization model (free vs subscription) and iOS requirement (9.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. HST Log sells 1 one-off in-app purchase and JuggernautAI sells 1 in-app purchase, starting at $34.99 per month. Whichever you choose, the download price is not the number that matters.

JuggernautAI holds the better App Store score, 4.8 against 3.1. That said, the two scores are not equally well evidenced: JuggernautAI has 5.7K ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 13% of HST Log's written reviews are positive against 73% of JuggernautAI's.

HST Log ships an update monthly, JuggernautAI every 4 days. Both last shipped on October 29, 2026.

## The numbers

| Metric | HST Log | JuggernautAI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.1 (11 ratings)](https://appshunter.io/ios/app/hst-log-hypertrophy-specific-training/id1216812769/reviews) | **[4.8 (5.7K ratings)](https://appshunter.io/ios/app/juggernautai/id1515756471/reviews)** |
| Number of ratings | 11 | **5.7K** |
| Positive reviews | 12.5% of reviews | **72.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 days** |
| Monetization | **Free** | Subscription |
| Size | 18 MB | 108 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Charles Vanderhoff](https://appshunter.io/developer/950621709) | [Juggernaut Apps](https://appshunter.io/developer/1627775482) |

## What reviewers say

### HST Log

[App page](https://appshunter.io/ios/app/hst-log-hypertrophy-specific-training/id1216812769)

This app guides users through a scientifically proven training program designed to maximize muscle growth. It follows a structured eight-week cycle with progressive loading and strategic deconditioning to optimize results for intermediate to advanced weightlifters.

**Highlights:** Scientifically proven training principles, Eight-week structured program, Progressive load increases, Strategic deconditioning periods, Focus on mechanical load stimulus, Frequent exposure to growth stimulus

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HST Pro | $4.99 | one-time |


### JuggernautAI

[App page](https://appshunter.io/ios/app/juggernautai/id1515756471)

This app uses AI to create personalized strength training programs for powerlifting and powerbuilding. It adapts to your feedback and goals, optimizing volume, frequency, and exercise selection for maximum strength gains and recovery.

**Highlights:** AI-generated personalized workout plans, Powerlifting and Powerbuilding goal focus, Adaptive training based on real-time feedback, Optimized training frequency and volume, Exercise selection for weak points, Periodization strategy for fatigue management

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| JuggernautAI Monthly | $34.99 | per month |

**What reviewers like**

- 🚀 Excellent programming and customization
- 👍 Detailed and user-friendly app
- 🔍 Adjusts based on user feedback
- 📈 Helps users achieve their goals
- 💪 Effective for building strength and muscle

**What reviewers complain about**

- 💰 Expensive monthly subscription
- 🔒 Paywall restricts access to full app
- 🕰️ Excessive time required for workouts
- 🐛 Occasional bugs and glitches

**Reported bugs**

- Clearing of workout history after each block
- Issues with the auto-timer feature
- Problems with selecting dates and times during setup

**Requested features**

- Integration with Apple Health or other fitness apps
- More flexibility in scheduling and workout days
- Improved exercise library and replacement options
- Better tracking and history of past workouts


## Frequently asked questions

### Is HST Log free?

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

### Is JuggernautAI free?

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

### Which has better reviews, HST Log or JuggernautAI?

JuggernautAI is rated higher. HST Log averages 3.1 out of 5 from 11 ratings, while JuggernautAI averages 4.8 from 5.7K ratings.

### Do HST Log or JuggernautAI have ads?

Neither HST Log nor JuggernautAI shows ads.

### Which is updated more often, HST Log or JuggernautAI?

HST Log ships an update monthly, and JuggernautAI every 4 days. Most recently, HST Log was updated on October 29, 2026 and JuggernautAI 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.*