What Are Sensitive Permissions on iOS
Sensitive permissions on iOS are system authorisations that allow installed apps to access your personal data, location, camera, microphone, contacts, calendar, health records and clipboard. Guard by MRVL helps you see which of your apps request these permissions and revoke the ones you don't trust.
The Full List of iOS Sensitive Permissions
iOS groups sensitive permissions into several categories. Location permissions let apps track your current position in real-time or only when the app is open. Camera and microphone permissions allow recording video and audio. Health data permissions access fitness, activity and medical records stored in the Health app. Contacts, calendar and photo library permissions grant access to your personal information and media. Clipboard permissions let apps read what you've copied. Tracking permissions (IDFA) allow apps to follow your behaviour across other apps and websites. Each permission is gated behind iOS's own privacy controls, but most users never review which apps have asked for them or which ones are actively using them once granted.
Why Apps Request Sensitive Permissions
Most apps request permissions for genuine reasons. A fitness app needs health data. A maps app needs location. A messaging app needs your contacts. However, some apps request more permissions than they actually need, or retain access to data long after it serves any purpose. Apps may also request permissions preemptively, hoping users approve without thinking. The difference between what an app needs and what it asks for is where privacy risk starts. This is why reviewing permissions regularly is important, especially for health apps, banking apps and anything that handles payment or sensitive personal information.
How to Check Permissions for Your Installed Apps
You can check what permissions any app has been granted by opening iOS Settings, scrolling to Privacy, and tapping each permission category (Location, Camera, Microphone, Contacts, Health, etc.). You'll see a list of all apps that have requested that permission and whether you've approved or denied them. This method works, but it's time-consuming if you have dozens of apps. Guard shows you the permissions landscape across 12 of the most commonly installed apps in its Free dashboard, highlighting which ones request sensitive access and assigning each app a privacy risk score. Tap any flagged permission to jump directly into iOS Settings and revoke it without navigating manually.
Revoking Permissions You Don't Want
Revoking a permission is straightforward in iOS Settings. Go to Privacy, select the permission category (Location, Camera, Microphone, Contacts, Health, Photos, Clipboard), find the app, and toggle it off. Once revoked, that app can no longer access that data type. Some apps will ask for permission again the next time they need it; others will fail silently if they lack critical permissions. Guard deep-links you directly to the Settings page for each flagged permission, so you don't have to hunt through menus. Personal Pro users get real-time alerts whenever any of their apps attempt to change or request new permissions, so you're notified the moment something shifts.
Which Permissions Are Highest Risk
The highest-risk permissions are those that expose your location, contacts, health data, photos, or clipboard. Location permission is particularly sensitive because it can track where you are and where you've been. Health data is protected by HIPAA-like privacy rules and should only be granted to legitimate health and fitness apps. Clipboard access is often overlooked but allows apps to read anything you've copied, including passwords, card numbers and private messages. Camera and microphone access can be abused, though iOS does show you a dot indicator in the status bar when these are actively in use. Guard's privacy risk score evaluates each app's permission profile and flags combinations that suggest data overreach.
What Guard Actually Does
Guard educates you about app permissions by walking you through a curated set of 12 common apps and showing what sensitive permissions each one requests. It generates a privacy risk score per app based on the sensitivity and number of permissions granted. You can tap any flagged permission to deep-link straight into iOS Settings and revoke it right there. The Free version covers the demo dashboard and risk scores. Personal Pro adds real-time alerts that notify you whenever any app on your phone requests a new permission or changes an existing one, plus a clipboard safety check and detailed tracking data per app. Family tier extends these protections across up to six devices with parental controls for children's phones. Note: Guard does not audit the real-time permissions of every app on your phone (iOS's sandbox architecture prevents third-party apps from doing this). Instead, Guard educates you with permission knowledge and makes revocation immediate.
See your app permissions and privacy risk score in seconds.
Frequently asked questions
Can I see all permissions for all my installed apps?
iOS Settings shows you all permissions granted to all apps, organised by permission category (Location, Camera, Microphone, etc.). Guard's Free dashboard covers 12 common apps and their risk profiles; Personal Pro adds real-time alerts when any app requests a permission change.
What happens if I deny a permission to an app?
The app loses access to that data type. It may prompt you again the next time it needs it, or it may fail silently. Most well-built apps work around denied permissions gracefully.
Do I need to delete an app if it asks for too many permissions?
Not necessarily. You can revoke individual permissions in iOS Settings and see if the app still functions. Many apps request permissions preemptively but don't use them all. Revoke first; delete only if the app becomes unusable without those permissions.
Are sensitive permissions the same as tracking permissions?
No. Sensitive permissions let apps access data stored on your phone (location, contacts, health). Tracking permissions (IDFA) let apps track your behaviour across other apps and websites. Both are privacy concerns, but they're separate.
Can apps secretly use my camera or microphone without my knowing?
iOS shows a dot in the status bar when camera or microphone is active, and you've already granted permission explicitly. A malicious app cannot access these without permission. However, once granted, you won't know what the app is recording unless you revoke access.
How often should I review app permissions?
Review them whenever you install a new app, after iOS updates, or monthly if you're privacy-conscious. Personal Pro alerts you automatically whenever something changes, so you don't have to check manually.