# Pockster StrongArm vs Protocol

The clearest difference is review sentiment: Protocol at 100% against Pockster StrongArm's 0%. Protocol also leads on rating (5.0 vs 1.4) and update cadence (every 2 months vs every 108 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

Protocol holds the better App Store score, 5.0 against 1.4. Both are backed by a comparable volume of ratings — 5 and 4 respectively. Written reviews point the same way: 0% of Pockster StrongArm's written reviews are positive against 100% of Protocol's.

Pockster StrongArm ships an update every 108 months, Protocol every 2 months. The most recent releases landed on October 12, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Pockster StrongArm | Protocol |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.4 (5 ratings)](https://appshunter.io/ios/app/pockster-strongarm/id301044470/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/protocol-sound-system/id6745834104/reviews)** |
| Number of ratings | **5** | 4 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 108 months | **Every 2 months** |
| Monetization | Paid | Paid |
| Size | 5 MB | 1 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Greg Chaffins](https://appshunter.io/developer/301044473) | [hsla0001](https://appshunter.io/developer/1778537322) |

## What reviewers say

### Pockster StrongArm

[App page](https://appshunter.io/ios/app/pockster-strongarm/id301044470)

Measure your physiological state by testing your fine motor control. Hold your iPhone steady with your arm outstretched for one minute to pass the challenge. The app tracks your ability to maintain stillness against gravity and fatigue.

**Highlights:** Measure steady hand control, Test against gravity, Track physiological state, Challenge friends and colleagues, Simple, intuitive gameplay

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

**In-app purchases:** none


### Protocol

[App page](https://appshunter.io/ios/app/protocol-sound-system/id6745834104)

This app generates refined ambient noise with a unique tactile and visual experience. It offers precise control over sound frequencies and features an elegant particle system that responds to touch, designed for focus, calm, and sleep.

**Highlights:** Ambient noise generation, Touch-responsive particle system, Precise frequency control, Haptic feedback, Background playback, Media controls integration

**In-app purchases:** none


## Frequently asked questions

### Is Pockster StrongArm free?

Pockster StrongArm is free to download, with no in-app purchases.

### Is Protocol free?

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

### Which has better reviews, Pockster StrongArm or Protocol?

Protocol is rated higher. Pockster StrongArm averages 1.4 out of 5 from 5 ratings, while Protocol averages 5.0 from 4 ratings.

### Do Pockster StrongArm or Protocol have ads?

Neither Pockster StrongArm nor Protocol shows ads.

### Which is updated more often, Pockster StrongArm or Protocol?

Pockster StrongArm ships an update every 108 months, and Protocol every 2 months. Most recently, Pockster StrongArm was updated on October 12, 2026 and Protocol on September 28, 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.*