L Speed tweaking app for Android

Martin Brinkmann
May 2, 2016
Updated • May 2, 2016
Google Android

L Speed is a popular tweaking application for Android that offers tweaks to improve the performance and battery life of your Android device.

The advanced nature of the tweaks makes root access a necessity. While you can install the app on any device running Android 4.0 and up, tweaks become only available after root permissions have been granted to L Speed.

The app displays information about the battery, memory, the process and kernel on start but those are not all that useful unless you are a developer or deeply interested in metrics such as the exact kernel identifier or the mapped memory.

That's not to say that you won't find some information useful, for instance the battery temperature and health, or how much memory hidden apps use.

Note: L Speed makes changes to core Android preferences. It is suggested to create a backup of your data before you star using the app.

L Speed

l speed android

A tap on the menu icon displays tweak categories that you can dive in. A good starting point is the main tweaks category which lists several pages worth of tweaks when it is loaded.

You can use quick tools listed at the top to free memory, run FSTRIM or calibrate the battery, or adjust listed preferences as you see fit.

The author lists a recommended setup on the apps' page on Google Play, but an option to enable with a single tap in the app itself is not provided currently.

This means that you will have to go through the list of tweaks manually to adjust preferences while you do so.

While you may be able to do so directly for several of the tweaks listed, it may sometimes be difficult to understand what a preference does under the hood or at all.

Since you have got only tweak names for that, you may need to research certain tweaks to understand what they do.

This is for instance the case for "flag turner", "misc tweaks", or " disable kernel panic" which are all listed on the main tweaks page.

A good starting point for that is the official thread on the XDA Developers website where you find information about individual tweaks.

The "Disable kernel panic" tweak for instance blocks the operating system from writing debug info or rebooting the system if the kernel detects and error from which it cannot recover.

Main tweaks is just one of the many tweak groups L Speed makes available. You find IO Tweaks, Net optimization tweaks, or a CPU tuner listed there as well.

Those groups don't throw dozens of tweaks at you however but they are worth a visit, especially if you want your device to improve in one of those categories.

The LNET Optimizer listing for instance allows you to enable Google DNS servers, faster streaming, or fast dormancy, and even adjust the NET buffers (default, small, big).

An option to reset all settings to their default values is provided as well.

Closing Words

L Speed has been designed specifically for Android devices that drain battery like crazy, lag, or offer bad performance. While you can use it on a pristine fast device as well, you will probably won't notice much of a difference when you do.

Your mileage may vary depending on the changes you make when using the app, and your device.

software image
Author Rating
3.5 based on 25 votes
Software Name
L Speed
Operating System
Software Category
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  1. Albert said on August 18, 2023 at 1:49 pm

    Thanks for the tip Martin.

    It is for these kinds of posts that I follow GHacks.

    1. Mike Williams said on August 26, 2023 at 8:55 pm

      What’s up with the generic comment, are you a bot?

  2. Tachy said on August 18, 2023 at 3:23 pm


    Where on the planet is that still in use? I was forced to give up using my RAZRV3 years ago because 2G was phased out by AT&T.

    1. arbuz said on August 20, 2023 at 5:02 pm

      Everywhere 3G has been turned off and you don’t have LTE coverage, and believe me there are many developed countries where this is the case and if it weren’t for 2G you wouldn’t even be able to make a phone call.

    2. Doc Fuddled said on August 31, 2023 at 5:55 pm

      Maybe I missed it, but I don’t believe tha term “2G” is in the article. Perhaps you are referring to “AGM G2”??

  3. Tachy said on August 18, 2023 at 3:27 pm


    Your website has gone insane.

    When I the post button I then saw my comment posted on a different article page. When I opened this article again, it is here.

    1. Martin P. said on August 31, 2023 at 4:39 pm

      @Tachy @Martin Brinkmann

      ” Your website has gone insane. ”

      Same here. Has happened several times.

      1. owl said on September 1, 2023 at 3:42 am

        @Martin P.,

        For over two weeks now,
        I’ve been seeing “Comments” posted by subscribers appearing in different, unrelated articles.
        For the time being,
        it would be better to specify the “article name and URL” at the beginning of the post.

  4. Anonymous said on August 18, 2023 at 11:17 pm

    @tachy a lot of non-phone devices with a sim in them rely on 2G, at least here in europe.
    Usually things reporting usage or errors/alarms on something remote that does not get day to day inspection in person. They are out there in vast numbers doing important work. Reliable, good range. The low datarate is no problem at all in those cases.
    3G is gone or on its last legs everywhere, but this stuff still has too much use to cancel.

    Anyhow, interesting that they would put that in. I can see the point if you suspect a hostile 2G environment (amateur eavesdroppers with laptop, ranging up to professional grade MITM fake towers while “strangely” not getting the stronger crypto voip 4G because it is being jammed, and back down to something as old ‘stingray’ devices fallen into the wrong hands).

    But does this also mean that they have handled and rolled out a fix for that nasty 4G ‘pwn by broadcast’ problem you reported earlier this year? I had 4G disabled due to that, on the off chance that some of the local criminals would buy some cheap chinese gear, download a working exploit and probe every phone in range all over town in the hope of getting into phones of the police.

  5. Andy Prough said on August 19, 2023 at 3:04 am

    >”While most may never be attacked in stingrays, it is still recommended to disable 2G cellular connections, especially since it does not have any downsides.”

    The downside would be losing connectivity. I spend a lot of time way out in the countryside where there’s often no service or almost none. My network allows 2G, and I need it sometimes. I have an option on the phone to disable 2G, I may do that when I’m in the city and I have good 5G connectivity, but not out in the country.

    I would imagine that the stingray exploits, like most of the bad things in this world, are probably things you will run into in the crowded big cities.

  6. owl said on August 21, 2023 at 3:40 am

    I stopped using it in a mobile (Wi-Fi line) environment, so I’m almost ignorant of the actual situation,
    But the recent reality in Japan makes me realize that “the infrastructure of the web is nothing more than a papier-mâché fiction”.

    It is already beyond the scope of what an individual can do.
    What we should be aware of is the reality that “governments and those in power want to control the world through the Web”, and efforts to counter (resist and prevent) such ambitions are necessary.

  7. Anonymous said on August 26, 2023 at 9:27 pm

    Why do you want people to disable the privacy features? Hmmmmm?

  8. Anonymous said on August 27, 2023 at 2:30 am

    Now You: do you plan to keep the Ads privacy features enabled?

    I’d like to tell you, but apparently if you make a post critical of Google, you get censored. * [Editor: removed, just try to bring your opinion across without attacking anyone]

  9. Tachy said on August 27, 2023 at 5:15 am


    You website is still psychotic. Comments attach to random stories.

  10. John G. said on August 28, 2023 at 2:46 pm

    @Martin please do fix the comments, it’s completely insane commenting here! :[

  11. ECJ said on August 28, 2023 at 5:37 pm


    The comments are seriously messed up on gHacks now. These comments are mixed with the article at the below URL.


    And comments on other articles are from as far back as 2010.

  12. Naimless said on August 29, 2023 at 12:57 am

    What does this article has anything to do with all the comments on this article? LOL I think this Websuite is ran by ChatGPT. every article is messed up. Some older comments from 2015 shown up in recant articles, LOL

  13. Paul Knight said on August 31, 2023 at 3:35 am

    The picture captioned “Clearing the Android Auto’s cache might resolve the issue” is from Apple Carplay ;)

  14. Anonymous said on August 31, 2023 at 9:57 pm

    How about other things that matter:
    Drop survival?
    Screen toughness?
    Degree of water and dust protection?

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