Reading App Permissions: Which Requests Make Sense

Permission prompts are the one moment an app has to tell you what it wants. A few seconds of judgement there prevents most quiet data leaks.

The principle behind permissions

Modern phones follow the principle of least privilege: a program should have access only to the information and resources it needs for its legitimate purpose. Permissions are how an app asks for more, and how you get a say.

Match the request to the job

The question is not whether a permission sounds scary, but whether it fits what the app does.

• A map app asking for location: expected.
• A video-call app asking for camera and microphone: expected.
• A torch, calculator or wallpaper app asking for contacts, SMS or location: a red flag.
• A game asking to read your text messages: there is rarely a good reason.

The permissions that deserve the most care

• SMS and call logs. These can expose one-time login codes and who you talk to.
• Accessibility services. Designed to help people with disabilities, they can read the screen and act on your behalf, which is why malicious apps ask for them.
• Device administrator. Can make an app hard to uninstall.
• Display over other apps. Can draw fake screens on top of real ones.
• Notification access. Can read the content of messages, including codes.

Use the finer-grained choices

Current versions of Android and iOS let you narrow many permissions. Choose "only while using the app" for location, approximate rather than precise location where it is enough, and selected photos instead of the whole library. Many systems also offer "ask every time" or one-time access.

Review what you have already allowed

1. Open the privacy or permissions section in your device settings.
2. Look through each sensitive permission and see which apps hold it.
3. Remove access from anything that does not obviously need it.
4. Uninstall apps you no longer use; many systems also revoke permissions automatically from unused apps.

When an app refuses to work without a permission

If an app will not open at all unless you grant something unrelated to its purpose, that tells you how it intends to make money or what it wants your data for. Look for an alternative, or use the website version instead. The guide to web apps and PWAs explains why the browser often asks for less.

Granting a permission is reversible. Revisiting your list every few months takes minutes and closes doors you forgot you opened.

Version checked 2026-11-09 · Rafael Duarte