# Protocol AI vs RepX

The clearest difference is review sentiment: RepX at 100% against Protocol AI's 0%. RepX also leads on rating (5.0 vs 1.0) and update cadence (daily vs every 4 days). Protocol AI's advantage is iOS requirement (15.1 vs 18.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Protocol AI sells 8 in-app purchases, starting at $4.99 per month and RepX sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

RepX holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: RepX has 18 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of Protocol AI's written reviews are positive against 100% of RepX's.

Protocol AI ships an update every 4 days, RepX daily. The most recent releases landed on September 16, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Protocol AI | RepX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/protocol-ai/id6742851434/reviews) | **[5.0 (18 ratings)](https://appshunter.io/ios/app/repx-workout-tracker/id6748642633/reviews)** |
| Number of ratings | 1 | **18** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 days | **Daily** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 52 MB | 30 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [WARREN JAMES DAY](https://appshunter.io/developer/1800318577) | [RepX LLC](https://appshunter.io/developer/1826765636) |

## What reviewers say

### Protocol AI

[App page](https://appshunter.io/ios/app/protocol-ai/id6742851434)

This app acts as a personal training partner, offering intelligent recovery tracking and personalized workout plans. It helps users train smarter, recover effectively, and achieve fitness goals faster by providing insights into body readiness and performance metrics.

**Highlights:** Intelligent recovery tracking, Personalized workout plans, Body Battery readiness indicator, Workout logging with rest timers, Performance and sleep insights

**Features:** macOS Compatibility

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited access | $4.99 | per month |
| Unlimited access | $4.99 | per month |
| Unlimited access | $14.99 | per month |
| Unlimited access | $14.99 | per month |
| Unlimited access | $39.99 | per year |
| Unlimited access | $39.99 | per year |
| Unlimited access | $39.99 | per year |
| Unlimited access | $59.99 | per year |


### RepX

[App page](https://appshunter.io/ios/app/repx-workout-tracker/id6748642633)

Log workouts, track progress with detailed graphs, and automatically detect personal records. Generate custom workouts, plan your schedule, and visualize body transformations with progress photos. Offers a free tier with limited logging and a premium subscription for unlimited access.

**Highlights:** Effortless workout logging (reps, weight, duration, RPE), Extensive exercise library with custom options, Apple Watch integration for wrist logging, Powerful progress graphs and automatic PR tracking, Smart workout generator and custom builder, Workout calendar and scheduling, Progress photo and bodyweight tracking

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RepX Monthly Premium | $0.99 | per month |
| RepX Annual Premium | $5.99 | per year |


## Frequently asked questions

### Is Protocol AI free?

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

### Is RepX free?

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

### Which has better reviews, Protocol AI or RepX?

RepX is rated higher. Protocol AI averages 1.0 out of 5 from 1 ratings, while RepX averages 5.0 from 18 ratings.

### Do Protocol AI or RepX have ads?

Neither Protocol AI nor RepX shows ads.

### Which is updated more often, Protocol AI or RepX?

Protocol AI ships an update every 4 days, and RepX daily. Most recently, Protocol AI was updated on September 16, 2026 and RepX on September 11, 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.*