# Protocol vs HardSet

The clearest difference is device support: HardSet at 3 against Protocol's 1. HardSet also leads on iOS requirement (13.0 vs 18.0). On price, 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.

## The numbers

| Metric | Protocol | HardSet |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/protocol-sound-system/id6745834104/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Paid | — |
| Size | 1 MB | 1 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone | **iPhone, iPod, Apple Watch** |
| Age rating | 4+ | 12+ |
| Developer | [hsla0001](https://appshunter.io/developer/1778537322) | [Bojan Lukacic](https://appshunter.io/developer/1566300118) |

## What reviewers say

### 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


### HardSet

[App page](https://appshunter.io/ios/app/hardset/id6757723427)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Protocol free?

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

### Is HardSet free?

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

### Do Protocol or HardSet have ads?

Neither Protocol nor HardSet shows ads.

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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.*