# Simple One vs JuggernautAI

The clearest difference is price: JuggernautAI at Free against Simple One's $0.99. JuggernautAI also leads on update cadence (every 4 days vs every 13 months) and ratings volume (5.7K vs 2). Simple One's advantage is in-app purchases (none vs 2). On ads and iOS requirement there is nothing between them.

JuggernautAI is free to download; Simple One costs $0.99 up front. JuggernautAI sells 1 in-app purchase, starting at $34.99 per month. Simple One asks for nothing beyond the download.

JuggernautAI holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: JuggernautAI has 5.7K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 50% of Simple One's written reviews are positive against 73% of JuggernautAI's.

Simple One ships an update every 13 months, JuggernautAI every 4 days. Both last shipped on October 20, 2026.

## The numbers

| Metric | Simple One | JuggernautAI |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [4.5 (2 ratings)](https://appshunter.io/ios/app/simple-one-rep-max-calculator/id1191599672/reviews) | **[4.8 (5.7K ratings)](https://appshunter.io/ios/app/juggernautai/id1515756471/reviews)** |
| Number of ratings | 2 | **5.7K** |
| Positive reviews | 50.0% of reviews | **72.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 4 days** |
| Monetization | **Paid** | Subscription |
| Size | 2 MB | 108 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Above AS](https://appshunter.io/developer/894620418) | [Juggernaut Apps](https://appshunter.io/developer/1627775482) |

## What reviewers say

### Simple One

[App page](https://appshunter.io/ios/app/simple-one-rep-max-calculator/id1191599672)

This app helps you accurately determine your one-rep max (1RM) using multiple proven formulas. It provides reliable estimates to help you choose the right weights for your training, ensuring safer and more effective strength progression.

**Highlights:** Accurate one-rep max estimates, Multiple proven calculation formulas, Determine training weights, Fast and simple interface, Distraction-free design

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

**In-app purchases:** none


### 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 Simple One free?

Simple One costs $0.99, with no in-app purchases.

### Is JuggernautAI free?

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

### Which has better reviews, Simple One or JuggernautAI?

JuggernautAI is rated higher. Simple One averages 4.5 out of 5 from 2 ratings, while JuggernautAI averages 4.8 from 5.7K ratings.

### Do Simple One or JuggernautAI have ads?

Neither Simple One nor JuggernautAI shows ads.

### Which is updated more often, Simple One or JuggernautAI?

Simple One ships an update every 13 months, and JuggernautAI every 4 days. Most recently, Simple One was updated on October 20, 2026 and JuggernautAI on October 20, 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.*