kas User Guide

📱 Introduction

kas is an Android application for managing accounts and purchasing apps. With kas, you can:

  • 🔐 Securely manage your accounts
  • 🔍 Search and query app information
  • 📦 View app details (version, size, rating, etc.)
  • 📥 Manage app purchase history
  • 🌍 Support switching between app stores in multiple countries/regions

⚠️ Important Notes

🚨 Read Before Use

Before using kas, please be sure to understand the following important information:

Click here to read the full User Agreement. Users must fully understand and agree to abide by this agreement before using the kas app.

1. Account Requirements

  • ✅ Use only your own account
  • ❌ Strictly prohibited to use other people’s accounts
  • ❌ Strictly prohibited to provide your account to others
  • ❌ Do not use accounts bound to any payment method

2. Risk Warning

  • ⚠️ Your account may be restricted or banned by the app store official
  • ⚠️ The developer assumes no responsibility for account bans
  • ⚠️ All risks are borne by you

3. Usage Restrictions

  • 📌 For personal use only
  • 📌 Non-commercial use only
  • 📌 Do not use for batch operations or provide paid services

4. Official Channels

If you fully understand the above risks and agree to the “User Agreement”, you can continue to use this application.

🚀 Installation and Startup

1. Download App

Download the latest version of the kas APK file from the download method provided on this webpage

Currently, this application is in internal testing and is only available in the internal communication group. Please join the communication group to download the app. Please continue reading to get the link to join the communication group

  • Ensure that you download the official version to avoid using third-party sources

2. Install App

  1. Allow installation of apps from unknown sources in phone settings
  2. Find the downloaded APK file
  3. Click Install
  4. Wait for installation to complete

3. Open App

  1. Open the kas app
  2. Read the security warning page
  3. Click “Official Website” or “Official Documentation” for details
  4. After confirming understanding of the risks, click “I understand the risks, enter the app”

4. Permission Description

The app requires the following permissions:

  • Internet Access: Used to connect to the app store server to query app information
  • Network State: Used to check network connection status

🎯 Feature Description

Main Functional Modules

kas contains four main functional pages:

1. 📇 Account Management

  • Add and manage accounts
  • View account details
  • Delete saved accounts
  • Support Two-Factor Authentication (2FA)

2. 🔍 Search Apps

  • Search apps
  • View app details
  • Quickly open links from clipboard
  • Support switching between multiple countries/regions

3. 📥 Download Management

  • View app purchase history
  • Manage download tasks
  • View purchase result details

4. ⚙️ Settings

  • App preferences
  • View app information
  • Access help documentation

📚 Detailed Tutorial

Step 1: Add Account

Preparation

Important: Before adding an account, please ensure:

  1. You are using your own account
  2. The account is not bound to any payment method (credit card, debit card, PayPal, etc.)
  3. If the account has Two-Factor Authentication enabled, please have your trusted device ready

Steps to Add Account

  1. Open the kas app
  2. Click the “Account” tab in the bottom navigation bar
  3. Click the “Add Account” button (+ icon)
  4. Enter your account email
  5. Enter password
  6. Click the “Login” button. You may need to enter the Two-Factor Authentication code
  7. Wait for login to complete

Two-Factor Authentication (2FA)

If your account has Two-Factor Authentication enabled:

  1. A Two-Factor Authentication dialog will pop up when logging in
  2. Check the 6-digit verification code on your trusted device. It may be an SMS.
  3. Enter the verification code in the dialog
  4. Click “Confirm” to complete login

Login Successful

After successful login, you will see your account information in the account list.

Step 2: Search Apps

  1. Click the “Search” tab in the bottom navigation bar
  2. Enter the app name or keyword in the search box
    • For example: X, WeChat, Instagram
  3. Click the “Search” button or the search button on the keyboard
  4. Browse search results
  5. Click any app to view details

Method 2: Open from Clipboard

If you have an app link:

  1. Copy the app link to the clipboard
  2. Open the “Search” page of the kas app
  3. Click the “Open from Clipboard” button
  4. The app will automatically recognize the link and open the app details page

Switch Country/Region

App Store content may vary by country/region:

  1. At the top of the search page, click the country/region code (e.g., “US”)
  2. Select your desired country/region from the list
    • 🇺🇸 US - United States
    • 🇨🇳 CN - China
    • 🇯🇵 JP - Japan
    • 🇰🇷 KR - South Korea
    • 🇸🇬 SG - Singapore
    • 🇹🇼 TW - Taiwan
    • More…
  3. Search again to view apps in that region

Step 3: View App Details

After clicking any app, you can see:

Basic Information

  • 📱 App Name
  • 👨‍💻 Developer
  • ⭐ Rating and Number of Reviews
  • 🎨 App Icon and Screenshots
  • 💰 Price Information

Detailed Information

  • 📦 App Size
  • 🔢 Current Version Number
  • 📅 Release Date
  • 📝 Update Notes
  • 📱 System Requirements
  • 🏷️ Category and Type
  • 📄 App Description

Action Buttons

  • Purchase: Record purchase information for free apps
  • View Versions: View historical versions of the app (purchase required first)

Step 4: Purchase App

Note: kas only supports free apps, not paid apps.

Single Account Purchase

If you have only one account:

  1. Click the “Purchase” button on the app details page
  2. The app will automatically use your account to purchase
  3. Wait for the purchase to complete
  4. After successful purchase, it will automatically jump to the “Download Management” page

Multi-Account Purchase

If you have multiple accounts:

  1. Click the “Purchase” button on the app details page
  2. Select the account to use
  3. Or select “Purchase with all accounts” to purchase simultaneously
  4. Wait for the purchase to complete

Purchase Instructions

  • ✅ The purchase operation will add the app to your account purchase history
  • ✅ This will not incur any costs (free apps only)
  • ⚠️ Please ensure the account used is not bound to a payment method

Step 5: View Download Management

View Task List

  1. Click the “Download” tab in the bottom navigation bar
  2. View all purchase records and tasks

Task Status

Each task may be in one of the following states:

  • 🕐 Waiting: Task created, waiting to start
  • 🔄 Purchasing: Purchasing app
  • ✅ Completed: Purchase completed
  • ❌ Failed: Purchase or download failed
  • ⏸️ Paused: Task paused
  • 🚫 Cancelled: Task cancelled

View Details

Click a task to view:

  • Basic app information
  • Purchasing account
  • Purchase time
  • Operation result
  • Error message (if any)

Batch Operations

Click the delete icon at the top to delete all completed tasks.

Step 6: Manage Accounts

View Account Information

  1. Click the “Account” tab in the bottom navigation bar
  2. Click any account to view details
    • Account Email
    • Name
    • Account Status
    • Added Time

Delete Account

  1. On the account details page
  2. Click the “Delete Account” button
  3. Confirm deletion

Note: Deleting an account will remove all information about that account from the local database, this operation cannot be undone.

Account Status

  • ✅ Normal: Account can be used normally
  • ⚠️ Update Required: Token expired, need to log in again
  • ❌ Abnormal: Account has issues

❓ FAQ

About Account Security

Q1: Is my password safe?

A: Your password is stored encrypted on your local device and will not be uploaded to any server.

Q2: Will using kas cause my account to be banned?

A: Using third-party tools to access services may violate the app store’s terms of service, and the app store has the right to restrict or ban your account. Please fully understand the risks and bear the consequences yourself.

Q3: Can I use an account bound to a credit card?

A: Absolutely not! To prevent accidental charges, please be sure to use an account that is not bound to any payment method.

Q4: What if I suspect my account password has been leaked?

A: Change your password immediately. If you believe the leak was caused by the kas app, please delete all accounts and uninstall the kas app. If you believe the leak was not caused by the kas app, please delete the account first and then re-add it to continue using the kas app.

About App Purchase

Q5: Why can I only purchase free apps?

A: kas is designed to support only free apps to prevent users from incurring accidental charges. We do not support or encourage purchasing paid apps through the kas app.

Q6: Will purchasing free apps incur charges?

A: Free apps themselves do not incur charges. However, if your account is bound to a payment method, charges may occur for other reasons. This is why we strongly urge you not to use accounts bound to payment methods.

Q7: What if the purchase fails?

A: Purchase failure may be due to the following reasons:

  • Network connection issues: Check your network connection
  • Account issues: Try logging in again
  • Token expired: Delete account and re-add
  • App removed: The app may not be available in the current region
  • App store server issues: Try again later

Q8: Why can’t I find a certain app?

A: Possible reasons:

  • Incorrect app name input
  • App not available in the currently selected country/region
  • App removed
  • App only available in specific regions

Solution:

  • Check app name spelling
  • Try switching to a different country/region

About Two-Factor Authentication

Q9: What is Two-Factor Authentication (2FA)?

A: Two-Factor Authentication is a security feature that requires a password and a temporary verification code when logging in to ensure that only you can access the account. It may appear as a pop-up on other devices or as an SMS verification code.

Q10: How to get the verification code?

A: The verification code will be displayed on your trusted devices (iPhone, iPad, Mac, etc.). Open these devices and check the pop-up verification code prompt.

Q11: What if I don’t receive the verification code?

A:

  • Ensure your trusted device is connected to the internet
  • Check if the device is turned on
  • Try to get the verification code again

About Data and Privacy

Q12: Does kas collect my data?

A: No. kas does not collect any user data. All account information is encrypted and stored locally on your device and will not be uploaded to any server.

Q13: Do ads collect my data?

A: Ads in the app are provided by third-party ad services, which may collect data according to their privacy policies. Ad pages will request you to confirm data-related permissions.

Q14: What happens to data after uninstalling the app?

A: After uninstalling the app, all locally stored account information and data will be deleted.

Technical Issues

Q15: What if the app crashes?

A:

  1. Ensure you are using the latest version
  2. Try clearing app cache
  3. Restart device
  4. Uninstall and reinstall
  5. If the problem persists, please consult the official documentation or contact support

Q16: What if network connection fails?

A:

  • Check if the device is connected to the internet
  • Try switching between Wi-Fi and mobile data
  • Check if VPN or proxy is used
  • Ensure firewall is not blocking the app

Q17: What if the app cannot be installed?

A:

  • Ensure download from official channels
  • Check if Android version meets requirements
  • Ensure sufficient device storage space
  • Check if installation of apps from unknown sources is allowed

🔒 Security Advice

Protect Your Account Security

1. Do Not Share

  • ❌ Do not provide your account information to others
  • ❌ Do not use other people’s accounts
  • ❌ Do not display your account information in public

2. Use Separate Accounts

  • ✅ Create a new account specifically for kas
  • ❌ Do not use your main account
  • ❌ Do not use accounts that have purchased many apps or subscriptions

3. Do Not Bind Payment Methods

  • ✅ Ensure the account is not bound to credit cards, debit cards, or other payment methods
  • ✅ Remove all payment information in account settings

4. Protect Device Security

  • ✅ Set strong password or biometric lock screen
  • ✅ Do not use kas on public devices
  • ✅ Do not use on insecure Wi-Fi networks

5. Regular Checks

  • ✅ Regularly check your account activity
  • ✅ Watch for any abnormal login or purchase records
  • ✅ Update password in time

Protect App Security

1. Download from Official Channels

  • ✅ Download only from official channels we provide
  • ❌ Do not download from third-party websites or app stores
  • ❌ Do not use APK files from unknown sources

2. Verify App Authenticity

  • ✅ Check app signature
  • ✅ Verify HTTPS certificate of official website
  • ✅ Compare app version information in official documentation

3. Update in Time

  • ✅ Follow update announcements on official website
  • ✅ Download the latest version for security fixes
  • ✅ Read changelog to understand changes

4. Do Not Share APK

  • ❌ Do not send APK files to others
  • ❌ Do not upload to third-party download sites
  • ✅ Share only official website links

How to Identify Fake Apps

Watch out for the following situations:

❌ Versions downloaded from non-official websites
❌ Requesting excessive permissions (e.g., reading SMS, call logs, etc.)
❌ Containing abnormal ads or pop-ups
❌ App icon or interface does not match official screenshots
❌ Requesting to upload account information to external servers
❌ Promising to download paid apps or cracked apps

If you discover a fake app, please immediately:

  1. Uninstall the app
  2. Change your account password
  3. Check account activity records
  4. Report to official

📞 Contact and Support

Get Help

If you encounter problems during use, you can:

  1. Consult Official Documentation

  2. Visit Official Communication Groups

It is recommended to join all the groups below to avoid groups being disbanded unexpectedly.

You need to complete the bot’s CAPTCHA to join. If you cannot open the links below, please check your internet connection.

  1. Contact Developer

    • Please visit the communication group to contact the developer

Feedback and Suggestions

We welcome your feedback and suggestions:

  • Feature suggestions
  • Bug reports
  • User experience feedback
  • Documentation improvement suggestions

Please submit feedback via the contact information in the official documentation.

📋 Appendix

System Requirements

  • Operating System: Android 8.0 (API 26) or higher
  • Storage Space: At least 50MB available space
  • Network: Internet connection required
  • Permissions: Internet access, network state

Known Limitations

  • Only supports free apps, not paid apps
  • Does not support In-App Purchase management
  • Does not support actual app download (only records purchase info)
  • Some features may be restricted due to policy changes

⚖️ Legal Disclaimer

  1. This app is not an official product of the app store
  2. Use of this app is subject to the “User Agreement”
  3. All risks are borne by the user
  4. The developer reserves the right to modify features and services

Please read the “User Agreement” in full before use.

🙏 Acknowledgements

Thank you for choosing kas!

We are committed to providing users with convenient tools, but please be sure to:

  • ✅ Comply with laws and regulations
  • ✅ Respect the rights of others
  • ✅ Protect account security
  • ✅ Use the app rationally

Enjoy using it!

© 2025 kas. All rights reserved.