L Speed App – Improve Performance, Reduce Lags and Extend Battery Life

Do you own an Android mobile with low specifications? Low end Android mobiles comes with certain limitations. Limitations such as older versions of Android operating systems, low RAM, underpowered processors, low internal memory, low processing speed etc. L Speed App is an application developed to overcome the above limitations to some extent.

L Speed App

YOU choose to install this application. I will not be held responsible for any data loss.
Please do some research about the features included in this application before installing it.

L Speed App – Improve Performance, Reduce Lags and Extend Battery Life

If you have an Android mobile that lags, or performs below your expectations, or runs out of battery very quickly then you should try L Speed App developed by Paget96.

Features of L Speed

Following are some of the L Speed noted features. For a full feature list, visit the development thread of the app at XDA-Forums (link attached below).

  • Boost
  • Battery Calibration
  • Kernel Tweaks
  • Liquid Smooth UI
  • CPU Tuner
  • IO Tweaks
  • LNET Optimizer
  • Virtual Memory Tweaks
  • Cleaner Scripts
  • Profiles
  • Seeder
  • FStrim etc

L Speed was a Terminal based custom recovery flashable modification. It was originally developed for the LG L Series, but later the modification was expanded and modified accordingly to run on any arm or x86 based device. Its goal is to improve overall performance, reduce significant lags, and extend battery life.

L Speed comes with a cleaner user interface. Tweaks are grouped under respective sections, explanations of tweaks can be accessed with a long click. L Speed App also supports Light and Dark color themes to suit everyone’s taste.

The mod should work on any Android device that meets the following minimum requirements.


  • Rooted Android mobile
  • Android 4.0.3 or higher
  • Minimum of 5 MB free space in system partition
  • Architecture: ARMv7, ARMv8, x86 or x86_64
  • White-listing

L Speed White-listing

You should add L Speed App to Whitelist of memory cleaning, autostart, or hibernating apps or features on your Android mobile. Check out the following list of devices for possible Whitelist options, the options may or may not present depending on the firmware/ROM installed.

  • Samsung: Settings -> Security -> Auto-start
  • Sony: Settings -> Power management -> STAMINA mode
  • MIUI: Settings (Security Center) -> Permissions -> Autostart
  • Huawei: Settings -> All (Permissions) -> Startup manager

XDA Developers community thread: https://forum.xda-developers.com/apps/l-speed/tweak-l-speed-v1-0-02-02-2015-t3020138

Note: Clean up your mobile ‘init.d’ folder before flashing this application. Recommended by the developer.

If you do not have any ‘init.d’ folder present at /system/etc/ then skip the following instructions. To clean your mobile init.d folder, follow the instructions below.

  • Install any root file explorer such as ‘ES File Explorer’.
  • Open root directory ( / ).
  • Open /system/etc/init.d folder.
  • Delete files from other mods such as zipalign, sqlite, setpermissions, system tweaks etc.
  • To be safe, reboot your Android mobile.

Installing and Configuring L Speed

1. Click on this link and install L Speed App from Play Store on your Android mobile.

2. Launch the app, and then grant root access.

3. Then click on GET STARTED, NEXT, NEXT and then FINISH to complete the setup process.

4. By default, the app displays Dashboard screen. This option shows information such as device information, CPU information and Kernel information.

L Speed - Dashboard

5. Menu > Main Tweaks

L Speed - Main Tweaks

Boost Now: This option cleans RAM memory by dropping inodes, dentries and page caches. Click on it.

Kill Media Server: This option stops the media server process to reduce overheating, thus increasing performance and battery life. Click on it.

Boost Scheduler: Schedule when boost should automatically clean RAM. Select from predefined time range from 30 minutes to 24 hours.

Disable debugging: This option improves performance by disabling logging and read/write debugging operations. Enable this option.

Kernel panic: This option enables/disables kernel panic time out. Leave this option to its defaults.

Kernel Samepage Merging: This option improves performance by enabling KSM; a memory saving de-duplication feature. For low-memory devices, enabling this option is a must.

Kernel Sleepers Optimization: This option improves kernel sleeper parameters used in deep-sleep mode for better performance. Enabling this option can cause issues for screen wakeup during alarms, calls etc due to deep-sleep. So test this option throughly.

Flag Tuner: This option disables a performance-limiting flag to increase battery life, and should NOT be enabled as it may cause instability in your Android mobile.

Allow Higher YouTube Resolution: This option enables higher resolution videos in YouTube. For low-processing mobiles, this option should be disabled for better performance.

Improve Scrolling: This option improves scrolling for smooth UI. Enable this option.

Liquid Smooth UI: Improves UI for better performance but on the other side effects battery life. Enable this option only if you have a large battery.

6. Menu > CPU Tuner

L Speed - CPU Tuner

CPU Info: This section displays online CPUs, Governors etc.

Governor Tuner: This option tunes online governor based on three different modes. Select the one that best suits your needs.

CPU Optimizer: This option optimizes the CPU performance. Battery will drain faster by enabling this option.

7. Menu > Battery

L Speed - Battery

Battery Information: This section displays battery health, level, state, temperature, voltage etc.

Wipe Battery Stats: This option deletes /data/system/batterystats.bin file to clear battery stats from system data. This process is also known as battery calibration. You need to restart your mobile after battery calibration in order to rebuilt batterystats.bin automatically.

Smart Battery Saver: This option saves battery based on three different modes. Select the one that best suits your needs.

Battery Improvement: This option improves battery life by tweaking the system. Enable this option.

Fast Charge: This option only works if your mobile kernel supports fast-charging. You do not need to enable this option if your mobile supports fast-charging by default.

8. Menu > LNET Optimizer

L Speed - LNET Optimizer

NET Buffers: Leave this option to its defaults. Changing modes for this option may effect battery life.

RIL Tweaks: This option improves mobile data transfer speed. Enable this option.

NET TCP Tweaks: This option boosts data transfer speed by modifying IPv4 TCP algorithm. Enable this option only if you know what you are doing.

NET Speed++: This option improves upload and download speed. Enabling this option may effect battery life.

WiFi Supplicant Scan Interval: This option sets the number of seconds WiFi should scan for nearby access points.

Google DNS: This option sets network DNS to Google public DNS. Enable this option.

9. Menu > IO Tweaks

L Speed - IO Tweaks

Scheduler Tuner: This option tweaks current running scheduler for best possible performance. Enable this option.

SD Tweaks: This option increases read/write speed. Enable this option only if your SD Card supports it.

I/O Boost: This option boosts input/output operations. Enable this option.

I/O Extended Queue: Leave this option to its defaults. Enabling this option may effect battery life.

Partition Remount: This option remounts all ext4 partitions with performance-improving mount options. Enable this option.

Disable I/O Stats: Leave this option to its defaults. Enabling this option may lead to abnormal behavior in certain apps.

10. Menu > RAM Manager

L Speed - RAM Manager

Under this menu item, leave all the options to its defaults except the following options.

RAM Manager: This option optimizes RAM usage based on three modes. Select the one that best suits your needs. I will suggest ‘Gaming’ mode.

Heap Optimization: This option optimizes heap memory based on RAM size and display density. Enable this option.

OOM Killer: This option changes default behavior of killing tasks by avoiding task-list scan. Enable this option.

OOM Dump Tasks: This option logs OOM killing tasks. Disabling this option improves performance.

zRAM Optimization: This option optimizes zRAM based on RAM size and recommended values. Enable this option.

11. Menu > Cleaner

L Speed - Cleaner

Clean App Cache: This option cleans installed applications cached files.

Clean Junk Files: This option cleans the junk and obsolete files generated by the system (logs, unused cached files etc).

Note: DO NOT touch Wipe Cache Partition and Wipe Dalvik Cache options unless you know what you are doing. These options generally do not cause any harm but they will delete the entire cache and dalvik cache partitions of your Android mobile.

12. Menu > FStrim

FStrim Now: This option reduces read/write lags. This option should be run once a month or so.

Note: Leave other options to their defaults under this menu item.

Finally, reboot your mobile after configuring the app and feel the performance of your Android mobile.

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