DEV Community: FAISAL ABBAS

How to Check App Permissions Before Installing an Android App

FAISAL ABBAS — Fri, 09 Oct 2026 16:47:28 +0000

Android apps make our lives easier, whether we use them for entertainment, productivity, gaming, or communication. However, before installing any Android app, it is important to understand what information and device features the app can access.

App permissions allow applications to use certain features of your device, such as the camera, microphone, contacts, location, and storage. While many permissions are necessary for an app to work correctly, some may be unnecessary for its main purpose.

In this guide, you will learn how to check app permissions before installing an Android app and how to make safer decisions when downloading APK files.

Why Are Android App Permissions Important?

App permissions help protect your personal information and control how applications interact with your device.

For example, a navigation app may need access to your location to provide directions. A video-calling app may require camera and microphone access. However, a simple calculator generally has no obvious need to access your contacts or microphone.

Checking permissions can help you:

Protect your personal information.
Reduce unnecessary access to sensitive device features.
Identify apps requesting permissions that seem unrelated to their purpose.
Make more informed decisions before installing an application.
Improve your overall Android security.

Remember that a permission request does not automatically mean an app is dangerous. The important thing is to understand why the permission is needed.

1. Check App Permissions on Google Play Store

Before installing an app from Google Play, review its available information and data safety details.

Follow these steps:

Open the Google Play Store on your Android device.
Search for the app you want to install.
Open the app's listing.
Review the developer information, description, ratings, and reviews.
Find the Data safety section, if available.
Review the information about data collection, sharing, and security practices.

Depending on the app and your Android version, you may also find information about permissions under the app's details.

Important: The Data safety section is based on information provided by the developer. It is useful, but it should not be treated as independent proof that an app is completely safe.

2. Understand Common Android App Permissions

Different permissions allow apps to access different parts of your device. Understanding them makes it easier to identify requests that deserve closer attention.

Location

Location permission allows an app to access your device's location, depending on the permission granted.

It may be necessary for navigation, weather, ride-booking, and location-sharing applications. However, a basic offline puzzle game usually has less obvious reasons to request precise location access.

Camera

Camera permission allows an app to use your device's camera.

It is commonly needed by photography apps, QR scanners, and video-calling services. Be cautious when an app with no camera-related functionality requests this access.

Microphone

Microphone access allows an app to capture audio.

Voice recorders, calling apps, and speech-recognition tools may require it. If an unrelated app requests microphone access, investigate why before allowing it.

Contacts

Contacts permission can allow an app to read your address book.

Communication apps may use it to help you find people you know. Other applications may not need access to your contacts at all.

Photos, Videos, and Files

These permissions can allow an app to access selected media or broader file collections, depending on the Android version and access method.

Photo editors and file managers may need this access. Whenever possible, use Android's photo picker or grant access only to the files the app needs.

Notifications

Notification permission allows an app to send notifications on supported Android versions.

This can be useful for messaging apps, reminders, and delivery updates. If you do not want unnecessary alerts, you can deny notification access where applicable or disable notifications later.

3. Check Permissions After Installing an App

You can review and manage an app's permissions through Android settings.

Follow these general steps:

Open Settings on your Android phone.
Select Apps or Apps & notifications.
Choose the application you want to review.
Tap Permissions.
Check which permissions are allowed or denied.
Change permissions that are unnecessary for the app's functionality.

The exact menu names may vary depending on your Android version and device manufacturer.

You can also review permissions by category. On many Android devices, open Settings, select Security & privacy or Privacy, and look for Permission manager.

Tip: Android may automatically reset permissions for apps you have not used for a long time. Check your device settings to see whether this feature is available.

4. Be Extra Careful When Installing APK Files

APK files allow you to install Android applications outside the Google Play Store. Although legitimate apps are distributed in APK format, downloading an APK from an unfamiliar source can carry additional risks.

Before installing an APK, follow these precautions:

Download it only from a source you have good reason to trust.
Check the app's name, developer, version, and intended functionality.
Review any permissions requested during installation or first use.
Avoid installing modified APKs that promise unlimited paid features or disabled security protections.
Keep Google Play Protect enabled where available.
Use a reputable security scanner if you need to investigate a suspicious file.

For additional guidance, you can visit APKDFLIX to explore Android app-related content. Always evaluate the safety and authenticity of an individual APK rather than assuming that every file from any website is safe.

Keep in mind that an APK's filename and displayed permissions alone cannot establish whether it is trustworthy. Malicious behavior may not be obvious from the installation screen.

5. What Should You Do If an App Requests Suspicious Permissions?

If an application requests access that appears unrelated to its purpose, do not grant the permission automatically.

Instead, take these steps:

Read the app description and check its intended features.
Look for an explanation from the developer.
Review independent user feedback and credible security information.
Deny the permission if it is not necessary for a feature you want to use.
Uninstall the app if you cannot establish a reasonable basis for trusting it.

Some apps may stop working correctly when a required permission is denied. That does not automatically make them malicious, but it is worth considering whether the requested access is appropriate.

6. Follow These Best Practices for Better Android Security

Checking permissions is one part of keeping your Android device secure. You should also follow these basic practices:

Keep Android and your applications updated.
Avoid downloading APK files from unknown websites or unsolicited messages.
Use a strong screen lock.
Review app permissions periodically.
Remove applications you no longer use.
Keep built-in security features enabled.
Be cautious of apps requesting Accessibility access, permission to install unknown apps, or other powerful privileges without a clear reason.

Accessibility access can be legitimate for assistive technologies, but it can also be abused. Treat requests for powerful permissions carefully, especially when an app does not explain why it needs them.

Frequently Asked Questions

Can an Android app access everything on my phone?

No. Android uses permission controls and application isolation to limit access. However, certain permissions and special privileges can provide broader access, so it is important to review what you allow.

Is an app safe if it requests only a few permissions?

Not necessarily. A small number of permissions does not guarantee that an app is safe. Consider its source, developer reputation, behavior, and other available security information.

Can I change app permissions after installation?

Yes. On most modern Android devices, you can open Settings, select Apps, choose an application, and manage its permissions.

Should I allow every permission an app requests?

No. Allow permissions only when they are appropriate for the features you want to use. Some permissions may be required for core functionality, while others may be optional.

Is downloading an APK file always dangerous?

No. APK is the standard Android application package format. The risk depends on factors such as the source, integrity of the file, developer, and app behavior. An APK downloaded outside Google Play deserves careful evaluation.

Final Thoughts

Checking app permissions before installing an Android application is a simple habit that can help you make better privacy and security decisions.

Take a moment to review the app's purpose, developer information, and available permission details. Grant access only when it makes sense, and pay particular attention to sensitive permissions such as location, camera, microphone, and contacts.

Whether you install apps through Google Play or use APK files, remember that convenience should not come at the expense of your privacy. A little caution before installation can help you use your Android device more confidently.

How Zalgo Text Works: Unicode Combining Characters Explained

FAISAL ABBAS — Sun, 20 Sep 2026 09:28:52 +0000

Zalgo text looks like ordinary text that has become distorted, stretched, or corrupted:

H̷e̸l̴l̷o̸

But there is usually no special “Zalgo font” involved. The effect is created by combining normal Unicode characters with additional Unicode combining marks.

In this post, I'll explain how the effect works, why it can become extreme, and what developers should know when handling these characters.

What Is Zalgo Text?

Zalgo text is a visual text effect created by placing multiple Unicode combining characters around normal letters.

A combining character normally modifies the character before it. For example, a combining accent can be placed above a letter.

Instead of:

you can combine it with a Unicode mark to produce something like:

a̷

When many combining marks are stacked together, the result can extend above and below the original text.

The Basic Structure

A simplified Zalgo sequence can look like this:

H + combining mark + combining mark + combining mark

The important part is that the extra characters are not necessarily independent visible letters.

They are combining characters, meaning their rendering is associated with another character.

For example, a string might conceptually contain:

H
+
U+0337
+
U+0301
+
U+035C

The exact appearance depends on the characters selected and how the text renderer handles them.

Why Does Zalgo Go Above and Below the Text?

Unicode contains combining marks that are rendered in different positions.

Some marks appear above a base character, some below it, and others can interact with the character in different ways.

When several of them are placed after the same base character, they can visually stack.

For example:

a̴̷̵̶

With enough marks, the text can become much taller:

a̴̷̵̶͆͌͋͐̚

This is where the familiar corrupted or “possessed” appearance comes from.

Is Zalgo Actually Random?

It doesn't have to be.

A simple generator can randomly select combining characters, but a more controllable implementation can divide the marks into groups and control how many are applied.

For example, a generator could have:

Light intensity

Medium intensity

Heavy intensity

Extreme intensity

It could also separate marks by their visual position:

Above

Below

Through

This makes it possible to create a predictable range of effects instead of generating completely random output.

Why Does the Same Zalgo Text Look Different?

Unicode characters are interpreted and rendered by software.

That means the same sequence can potentially look different depending on:

Operating system

Browser

Font

Application

Text-rendering engine

Available Unicode support

A sequence that looks reasonable in one environment can become much more distorted in another.

This is one reason heavily stacked combining characters are interesting to experiment with.

Zalgo Text and Unicode Normalization

Developers working with combining characters should also understand Unicode normalization.

A Unicode string can sometimes have different representations that are canonically equivalent.

Normalization forms such as NFC and NFD are commonly used when applications need consistent Unicode representations.

However, normalization should not be treated as a simple “remove Zalgo” solution. Combining marks are legitimate Unicode characters and are used for many normal writing systems.

The important distinction is between valid combining-character usage and an unusually large stack of combining marks.

Why Excessive Combining Marks Can Cause Problems

Large numbers of combining characters can create practical problems.

For example, extremely long sequences may:

Become difficult to read

Increase the visual height of text

Cause unusual line wrapping

Behave differently between applications

Create accessibility problems

Make text processing more complicated

This is especially important for websites that allow users to submit arbitrary text.

A text field that accepts Unicode should not automatically assume that every character is a normal standalone glyph.

Building a Simple Zalgo Generator

The basic concept behind a generator is fairly simple.

You start with normal text:

Hello

Then, for each character, you can append a selected number of combining marks.

Conceptually:

for each character:
output character
add combining marks

The important part is choosing which marks to use and how many should be added.

A simple implementation might randomly select marks from predefined Unicode ranges.

A more advanced implementation can provide controls for intensity and direction so the user can create a more predictable result.

Testing Zalgo Text

I built a small online tool to experiment with this process:

Cursed Text Generator

It allows you to generate different cursed, glitch, and Zalgo-style text effects and copy the resulting Unicode text.

The useful part isn't just the visual effect. You can also copy the generated output and inspect the actual characters to understand how the sequence is constructed.

A Useful Experiment

One interesting experiment is to generate the same word at several intensity levels.

For example:

Hello

Then compare increasingly larger stacks of combining characters.

You can copy each result into different browsers or applications and observe:

How the text is rendered.

Whether the marks stack consistently.

How line height changes.

Whether the application clips the marks.

Whether copy/paste preserves the characters.

This gives a much better understanding of how combining characters behave than simply looking at a generated image.

Final Thoughts

Zalgo text is a good example of how Unicode can produce visual effects without requiring a special font or image.

The effect comes from combining normal characters with Unicode combining marks, and the amount and selection of those marks can dramatically change the result.

For developers, the interesting part is not only creating the effect but also understanding how Unicode strings are processed and rendered across different environments.

If you've experimented with heavily stacked combining characters, I'd be interested to hear which Unicode characters or ranges produced the most interesting rendering behavior.