---
title: 3.1.4 Hardware-Specific Content
framework: app-store-review
role: article
role_heading: Guideline
path: app-store-review/3.1.4
---

# 3.1.4 Hardware-Specific Content

3.1.4 Hardware-Specific Content: In limited circumstances, such as when features are dependent upon specific hardware to function, the app may unlock that functionality without using in-app purchase (e.g.

## Overview

**3.1.4 Hardware-Specific Content:** In limited circumstances, such as when features are dependent upon specific hardware to function, the app may unlock that functionality without using in-app purchase (e.g. an astronomy app that adds features when synced with a telescope). App features that work in combination with an approved physical product (such as a toy) on an *optional* basis may unlock functionality without using in-app purchase, provided that an in-app purchase option is available as well. You may not, however, require users to purchase unrelated products or engage in advertising or marketing activities to unlock app functionality.