Mobile App Permissions: What to Allow and What to Deny

How Mobile App Permissions Work

Mobile app permissions are the access controls that determine what device features and data an app can use. When an app requests permission to access your camera, microphone, location, contacts, or files, your operating system acts as a gatekeeper, allowing or blocking access based on your decision.

iOS and Android handle permissions differently. iOS has historically been more restrictive, requiring apps to request permissions at the moment they need them and providing granular control over each permission. Android has evolved significantly, moving from an all-or-nothing model in early versions to a permission system that now rivals iOS in granularity.

Understanding what each permission allows and why an app might need it empowers you to make informed decisions rather than reflexively tapping "Allow" to get past the dialog. Many apps request far more permissions than their core functionality requires, collecting data that is used for advertising, analytics, or sale to third-party data brokers.

Understanding Common Permissions

Location

Location permission gives an app access to your GPS coordinates. This is the most sensitive permission because it reveals where you live, work, travel, and spend your time. A complete location history creates an intimate profile of your daily life.

When to allow: Navigation apps, weather apps, ride-sharing services, and delivery apps have legitimate needs for location data. Choose "While Using the App" rather than "Always" whenever possible. An app that needs your location only when actively in use does not need background location access.

When to deny: Games, flashlight apps, calculators, photo editors, and most utility apps have no legitimate need for your location. If a simple utility requests location, it is likely collecting data for advertising purposes.

Camera and Microphone

Camera permission allows an app to take photos and record video. Microphone permission allows audio recording. Together, these permissions grant the most intimate access to your physical environment.

When to allow: Video calling apps, camera apps, voice recording apps, and QR code scanners need these permissions for core functionality. Social media apps need camera access if you want to create photo or video content within the app.

When to deny: Any app that does not have an obvious visual or audio feature should not need these permissions. Be especially cautious of apps that request microphone access without a clear voice-related feature. While the persistent myth of apps "listening" to your conversations for ad targeting is largely debunked, unnecessary microphone access is still a genuine privacy risk.

Contacts

Contacts permission gives an app access to your entire address book: names, phone numbers, email addresses, and any other information stored in your contacts. This affects not just your privacy but the privacy of everyone in your contact list.

When to allow: Messaging apps and calling apps that need to find which of your contacts also use the service. Even then, some privacy-focused messaging apps like Signal handle contact matching without uploading your entire address book.

When to deny: Most apps that request contacts are looking to upload your address book for "Find Friends" features that also feed their data collection. Social media apps, games, and productivity tools rarely need full contact access.

Storage and Files

Storage permission allows an app to read and write files on your device. On Android, this historically meant access to your entire file system, though recent versions have moved to scoped storage that limits access.

When to allow: File managers, document editors, media players, and backup apps need storage access for their core functions. Photo and video editing apps need access to your media files.

When to deny: Apps that only need to save their own data should use app-specific storage that does not require this permission. A game that requests broad storage access may be scanning your files for data collection purposes.

Red Flags in Permission Requests

Certain permission requests are immediate red flags that suggest an app is prioritizing data collection over functionality.

A flashlight app requesting contacts, location, and microphone access is a classic example. The app needs only the camera flash LED, which typically does not even require a permission on modern devices. Any additional permissions serve the developer's data collection interests, not yours.

A calculator requesting location and storage access, a wallpaper app requesting contacts and call logs, or a simple game requesting camera and microphone access all follow the same pattern. The permissions are disproportionate to the app's stated function.

Watch for apps that refuse to function unless you grant all requested permissions. Legitimate apps degrade gracefully when optional permissions are denied. An app that will not open without camera access even though its primary function is unrelated to photography is likely using that permission for data collection.

Reviewing and Managing Existing Permissions

On iOS

Go to Settings, then Privacy and Security. Each permission type is listed with the apps that have access. Tap any permission type to see which apps have it and change the setting. iOS also provides an App Privacy Report (Settings, then Privacy and Security, then App Privacy Report) that shows how frequently each app accesses sensitive data and which domains it contacts.

On Android

Go to Settings, then Privacy, then Permission Manager. You can view permissions by type to see all apps with a specific permission, or view by app to see all permissions granted to a specific application. Android also provides a Privacy Dashboard that shows a timeline of permission usage over the past 24 hours.

Review your permissions quarterly. You will likely find apps with access to sensitive data that you granted months ago and have since forgotten about. Revoke any permission that does not serve the app's current purpose in your life.

Best Practices for App Permissions

Start with denial as your default. When an app requests a new permission, deny it initially and see if the app functions adequately without it. Many apps request permissions they want but do not strictly need. You can always grant the permission later if you find the functionality missing.

Choose "While Using the App" for location instead of "Always" unless you have a specific reason for background location access. Fitness trackers that record your running route and navigation apps providing turn-by-turn directions may need background location, but most apps do not.

Before installing a new app, check its permission requirements in the app store listing. On both iOS and Android, the store shows what data the app collects and which permissions it requests. Use this information to evaluate whether the app's data collection is proportionate to its function.

Use our metadata remover to strip location data from photos before sharing them through apps, adding an additional layer of privacy protection even when apps have the permissions they request. Strong account security with unique passwords from a password generator complements permission management by protecting the accounts these apps are connected to.

Your phone contains more personal information about you than any other device. Managing app permissions carefully is one of the most impactful privacy actions you can take.