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✨ Module Introduction

AppRetentionHook is an LSP module that implements background retention by hooking into the system’s kill logic. 📌 Version 5.1+ is a completely refactored new version!! Give it a try!

🔹 Supported Systems (for version 5.1+):

• ✅ HyperOS V1 / V2
• ✅ AOSP 10-15
• ✅ Samsung OneUI (Usage scope is unknown)
• 🚧 Color OS (Not fully adapted yet, but usable)

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🛠 Usage Notice

📌 Why might some applications still be killed? This module only intercepts kills triggered by system scheduling; it cannot address application crashes, self-termination, or other similar behaviors!

📌 Intercepted Kill Sources (system behaviors):

• Idle device cleanup
• Process count limitations
• Maximum background process restrictions
• Restricted application policies
• Scheduled task cleanup
• Doze/empty process restrictions

⚠ The module does NOT intercept the following kill behaviors:

• Active killing by lmkd (triggered by memory overload)
• Application ANR (not responding), updates, self-termination, uninstallation, crashes, etc.

💡 Module Objective: Opened applications will not be killed due to system scheduling, thereby prolonging their background retention as much as possible!

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🔧 Installation and Usage

📌 Please enable this module within LSP!

1. Installation: Download and install this module.
2. Activation: Open LSP, select this module, and enable it.
3. Select the applicable scopes (depending on the system):
   • MIUI / HyperOS: System Framework (system) and Battery & Performance (powerkeeper) [if available]
   • Color OS: Athena, Battery, and System Framework (system) (Note: Version 5.1+ is not fully adapted for Color OS, but it is usable)
   • OneUI: System Framework (system)
4. Restart your device!

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🌟 Module Effects

✅ Testing shows that the background retention time of apps has significantly increased, with no system-initiated app kills observed over extended periods. ✅ Even after an entire night, apps continue to run in the background. ✅ Example Apps (including but not limited to):

• QQ, Bilibili, Douyin
• GitHub (Android), Twitter (X), Telegram, YouTube, etc.

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⚠ Potential Issues

⚠ Due to modifications in the system’s operational logic, this module may have the following impacts:

1. Failure of system memory management: When memory is low, automatic cleanup will not occur, which may result in system freezes.
2. Increased standby power consumption: Although the impact is minor, battery usage may be slightly higher.
3. Some devices may experience boot hang issues.

🚨 Strongly Recommended: Please ensure you have a backup before using this module to avoid extreme issues such as failure to boot!

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🔍 Frequently Asked Questions

❓ Q: How do I use this module? 💡 A: Please carefully read the README and ensure that the correct LSP scopes are configured.

❓ Q: Does this module conflict with other retention modules? 💡 A: Yes, please do not use multiple modules with the same functionality simultaneously! Examples of conflicting modules include:

• Don-t-Kill
• Cemiuiler (overlapping functionalities)
• A1 Memory Management LSP Module

❓ Q: Why is my system freezing? 💡 A: Please check your device's memory usage. This module does not perform automatic memory cleanup.

❓ Q: Why has my standby power consumption increased? 💡 A: With apps staying alive in the background for longer, increased power consumption is a normal phenomenon, though the impact is minimal.

❓ Q: Why does my device hang during boot? 💡 A: Some devices may be incompatible. If you encounter this issue, please uninstall the module and provide feedback.

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🙏 Acknowledgments

💡 Some parts of this module's code reference the following projects. Special thanks to:

Project Name	Project Link
Cemiuiler	Cemiuiler GitHub
Don't Kill	Don-t-Kill
HookTool	HookTool

📌 Translation Provided By:

• English: HChen (焕晨HChen), ℓοѕτ οиє ⌕ — 🚫🥄 (Telegram Name)
• Simplified Chinese: HChen (焕晨HChen)

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📢 Project Disclaimer

⚠ By using this module, you agree to assume all risks and consequences! ⚠ This project is not responsible for any derivative projects! ⚠ Plagiarism will result in the project becoming closed source! Please attribute the author!

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🎉 Conclusion

💖 Thank you for your support. Enjoy your day! 🚀