Android Accessibility Service — What It Can and Can't Do
What Android Accessibility Services can and can't do, why Google restricts them, and how Arc uses them responsibly. Free to try.
Android Accessibility Services are one of the most powerful — and most misunderstood — features on Android. They let apps read what’s on your screen, respond to interactions, and automate tasks that would otherwise require dozens of taps.
But Google has been tightening the rules around accessibility services, and for good reason. This guide covers everything you need to know: how they work, what they can do, the restrictions Google has put in place, and how apps like Arc AI Screen Assistant use them responsibly.
What Is an Android Accessibility Service?
An Accessibility Service is a special Android component that runs in the background and can observe and interact with the user interface on behalf of a person with disabilities. It was originally designed for:
- Screen readers — reading on-screen text aloud for visually impaired users
- Switch access — letting users control their device with a single switch
- Magnification — zooming into parts of the screen
- Voice control — navigating the UI through spoken commands
The key capability that makes accessibility services unique is screen reading: they can observe the entire UI hierarchy, including text content, button labels, and layout structure — across every app on the device.
How Accessibility Services Work
When an Accessibility Service is enabled, Android gives it access to AccessibilityEvent objects that describe what’s happening on screen. The service can:
- Read the UI tree — all visible text, content descriptions, and view hierarchies
- Perform actions — click, scroll, focus, and navigate between elements
- Listen for events — window changes, text selection, notifications
- Retrieve window content — capture the full content of any visible window
This is far more powerful than regular Android permissions. A normal app can only see its own UI. An accessibility service can see everything.
Why Google Is Restricting Accessibility Services
With great power comes great abuse. Over the years, accessibility services have been used for:
- Ad fraud — automatically clicking ads
- Spyware — silently reading passwords and messages
- Automation abuse — bots that farm games or spam social media
- Data harvesting — scraping content from banking, dating, and messaging apps
Google’s response has been progressively tighter restrictions:
2023: Play Store Policy Update
Google required apps using accessibility services to declare a specific accessibility purpose and prove they genuinely help people with disabilities. Apps that used accessibility APIs purely for automation were removed.
2024: API Restrictions
Android 14+ introduced restrictions on which accessibility events apps can listen to. Apps can no longer receive events from all packages by default — they must declare specific packages or request exemption.
2025: Enforcement Tightening
Google now actively reviews accessibility service declarations during Play Store review. Apps that request accessibility permissions without clear, legitimate use cases face rejection.
What Accessibility Services Can Still Do (Legitimately)
Despite the crackdown, accessibility services remain essential for genuinely helpful apps. Here’s what’s still allowed:
For Users With Disabilities
- Read screen content aloud
- Provide alternative navigation methods
- Announce notifications and alerts
- Offer text magnification and high-contrast modes
For Productivity (With Proper Disclosure)
- Summarize on-screen content — like reading an article and providing a summary
- Extract structured data — pulling dates, addresses, OTPs from visible text
- Draft contextual responses — generating replies based on conversation content
- Screen-level search — finding specific information across any app
The key requirement is transparency: the user must explicitly enable the service, and the app must clearly explain what data it collects and why.
How Arc Uses Accessibility Services
Arc AI Screen Assistant uses accessibility services for one purpose: helping you do more with what’s already on your screen.
Here’s what Arc can do because of accessibility services:
- Smart Summarize — reads any article, chat, or document on screen and gives you the key points
- Smart Extract — pulls out dates, addresses, phone numbers, OTPs, and event details from visible content
- AI Reply — drafts responses based on the conversation you’re looking at
- Flashcards — turns any on-screen text into study cards with one tap
- Call Transcription — transcribes phone calls so you never miss important details
Arc never sends your data to third parties, never stores screen content beyond the current session, and never uses accessibility APIs for advertising or tracking. The service reads your screen only when you trigger a feature — not continuously in the background.
How to Enable an Accessibility Service on Android
If you’re installing an app that uses accessibility services (like Arc), here’s how to enable it:
- Open Settings → Accessibility
- Find the app in the list (e.g., “Arc”)
- Tap on it and toggle Use Arc to on
- Confirm the permission dialog
Android will show a warning about the permissions involved — this is normal and appears for every accessibility service. Read the app’s privacy policy to understand what it does with the data.
Accessibility Service vs. Other Android Permissions
| Capability | Accessibility Service | Regular App | Device Admin |
|---|---|---|---|
| Read own app’s UI | ✅ | ✅ | ✅ |
| Read other apps’ UI | ✅ | ❌ | ❌ |
| Perform clicks/taps | ✅ | ❌ | ❌ |
| Read notifications | ✅ | ❌ | ✅ (with permission) |
| Read all screen text | ✅ | ❌ | ❌ |
| Install apps silently | ❌ | ❌ | ❌ |
No other Android permission gives an app the ability to read other apps’ screens. That’s why accessibility services are both so powerful and so carefully regulated. If you’re evaluating whether to grant accessibility permissions to an app, this table should make one thing clear: the capability is extraordinary, and it deserves extraordinary scrutiny before you hand it over. Don’t just tap “Allow” — read what the app does, check its privacy policy, and ask yourself whether the feature you’re getting is worth the access you’re granting.
Common Issues With Accessibility Services
”Why does my accessibility service keep turning off?”
Some Android manufacturers (Xiaomi, Samsung, Oppo) aggressively kill background services to save battery. To keep an accessibility service running:
- Disable battery optimization for the app
- Lock the app in recent tasks (long-press → lock)
- Disable “Auto-start” restrictions in manufacturer-specific settings
”Why does Android warn me about accessibility services?”
Android warns about every accessibility service, not just shady ones. The warning is mandatory. What matters is whether the app is transparent about what it does with the data.
”Can accessibility services read my passwords?”
They can technically see password fields, but well-designed apps mask or skip sensitive content. Arc, for example, does not process password fields or financial PIN entry screens. When you’re entering a password or banking PIN, Arc’s Smart Extract and other reading features simply don’t activate. This is a deliberate design choice — there’s no legitimate reason for a screen assistant to read your password, so we don’t.
”How do I know if an app is misusing accessibility?”
Check your accessibility settings regularly. If you see an app you don’t recognize, or an app that doesn’t clearly explain why it needs accessibility access, disable it immediately. Legitimate apps will always tell you exactly what they use accessibility for — and it should make obvious sense. A screen reader reading your screen? That makes sense. A flashlight app reading your screen? That does not.
The Future of Android Accessibility
Google is walking a fine line between enabling legitimate accessibility tools and preventing abuse. Expect:
- More granular permissions — choosing which apps an accessibility service can read
- Stronger Play Store enforcement — more detailed review of accessibility declarations
- On-device AI integration — combining accessibility services with local AI models for better privacy
- System-level screen understanding — Android 17’s on-device AI may provide screen context without giving apps raw UI tree access
For developers, the message is clear: if your app uses accessibility services, it must genuinely help people. The days of using accessibility APIs as a shortcut for features that could be implemented through other means are over. And for users, the takeaway is similar: grant accessibility permissions only to apps you trust, and review what’s on your accessibility list periodically.
I built Arc to use accessibility services the way they were intended — to make your phone more accessible and more useful. Every feature in Arc starts with “what’s on your screen right now?” and ends with “here’s something helpful you can do with that information.” That’s the contract, and it’s one I take seriously as a solo developer.
Getting Started With Arc
If you’re looking for an Android app that uses accessibility services responsibly — to help you summarize, extract, reply, and learn from anything on your screen — try Arc free on Google Play.
Arc uses Google Gemini’s on-device and cloud AI to understand what’s on your screen and help you act on it — without switching apps, without copying and pasting, and without sending your data anywhere it shouldn’t go.
Have questions about Android accessibility or how Arc works? Check our docs or reach out to me directly.