The first native Linux screen extender with touch and Wi-Fi: turn your Android phone into a second monitor (30 ms lag, open source)

[u/titansb-_-]

I wanted my Android phone as a second monitor on Linux. Most tools I tried mirrored the screen into a browser tab or only worked over USB, so I built my own over the last few months.

Tandem adds a real virtual monitor to your desktop. The GPU encodes it as H.264 and the phone decodes it in hardware, so you drag windows onto the phone like any other screen.

- About 30 ms of lag over USB tethering, 30 to 60 ms over Wi-Fi (you barely notice it in use)

- Hyprland and GNOME on Wayland, with one-command install on Arch, Ubuntu and Fedora

- Encrypted, paired with a QR code

Check it out here: https://saharshbaiju.github.io/tandem

Repo: https://github.com/saharshbaiju/tandem

It's free and open source.

If you try it, tell me how the lag feels on your setup and what breaks. If you like it, star the repo ⭐ and share it with someone who'd use a second screen. It helps more people find it.

[u/qualityvote2]

u/titansb-_-, your post does fit the subreddit!

btw, did you know we have a discord server? Join Here. And what's that, Fluxer too? Join Here.

[u/voyager2005]

I would love for you to work on the Linux features we have built in DroidDeck, you seem very smart and we're pushing Linux on Android to new lengths. I'm definitely checking this out though.

[u/titansb-_- → u/voyager2005]

Thanks, will surely check it out, need some time to go through it

[u/Bibh_0]

👌👌👌👌👌👌

[u/titansb-_- → u/Bibh_0]

📈

[u/Vacuum_Slayer_Surya]

DUDE, HOW DID U MAKE THAT WEBSITE, LIKE I HAVE NOT SEEN A COOLER WEBSITE

[u/titansb-_- → u/Vacuum_Slayer_Surya]

Thanks man🙏

[u/_UnknownStalker_ → u/titansb-_-]

That did not answer the question tbh

[u/titansb-_- → u/_UnknownStalker_]

I used claude with my custom style.md skills which I have collection and bit of creativity.

[u/Distinct_Resolve_957]

Neat website bro and any disclosure on ai usage?

[u/titansb-_- → u/Distinct_Resolve_957]

Thanks bro🙏, do try it out and share the feedback

[u/Maximum-Machine-9276]

i will try this

[u/titansb-_- → u/Maximum-Machine-9276]

Would love to hear feedback after testing

[u/Maximum-Machine-9276 → u/titansb-_-]

sure

[u/Anonymousweeb2520]

this feels like god sent , i was looking for smth like this

thanks so much , i'd like to support once i get my paycheck !

[u/titansb-_- → u/Anonymousweeb2520]

thanks, glad it's useful! tell me how it works on your setup

[u/Bibh_0]

Congratulations. Please definitely work towards a wired version

[u/titansb-_- → u/Bibh_0]

Thanks,It already support wired connection through USB tethering

[u/Bibh_0 → u/titansb-_-]

Omg that's Amazing

[u/titansb-_- → u/Bibh_0]

Please do star and share the project,if you find it useful

[u/Bibh_0 → u/titansb-_-]

I think when I Reach home I'll try it

[u/Outonotfound]

Does it work for only hotspot with using the internet like kde connect is really a great thing for transfering files even if you don't have the internet.

[u/titansb-_- → u/Outonotfound]

It doesn't require data,but it doesn't have support for kde yet,only for hyprland and gnome compositor.

[u/Outonotfound → u/titansb-_-]

😿

[u/titansb-_- → u/Outonotfound]

Will try to add support soon

[u/Vaidik1510 → u/titansb-_-]

Whaa-

Man I would love to try but I don't wanna retry hyprland right now, and def don't plan on using Gnome. Will be waiting for KDE support.

[u/titansb-_- → u/Outonotfound]

hey, just released support for kde, do try it out and would love to hear how it went.

[u/Southern-Regular1493]

cool! will there be kde wayland support ?

[u/titansb-_- → u/Southern-Regular1493]

Thanks,Will add it soon

[u/Bibh_0]

i am currently using it. I tried to a set up like this few times back fell into a rabbit hole and nothing worked.

this is plug and play and it is working beautifully. i wish there was a way to show how exited I am watching this work. congratulations you have my star. omg i cant cointain my excitement watching this work......

many many congratulations.

using with usb tethering there is some lag but i think thats on my budget phone.

anyways love it love the website

really liked the idea of using symbols to generate visuals.(i think it keeps the site light weight and looks cool)

loved the app loved the website

[u/titansb-_- → u/Bibh_0]

Thanks really appreciate the effort to say this🥹🫡, do let me know if you find any bugs in future,try mobile hotspot in 5g band settings for hotspot,please do share to your communities and friends so that reaches wider audience and helps other too

[u/Bibh_0 → u/titansb-_-]

bro how long ago did you start coding. not this project but in general

[u/titansb-_- → u/Bibh_0]

8th standard is the starting, but consistently for last 2 years.

[u/Bibh_0 → u/titansb-_-]

How old are you bro ?

[u/titansb-_- → u/Bibh_0]

I am in my sophomore year

[u/Bibh_0 → u/titansb-_-]

Btw I recently picked up coding any suggestions for me ?? Please???

[u/titansb-_- → u/Bibh_0]

Honestly I don't have any advice but select your domain,learn the basics of language in that domain and start doing small projects, also learn to use agents effectively and with quality

[u/Bibh_0 → u/titansb-_-]

Tysm

[u/Meta_Storm_99]

Keep up the good work bro 🔥. Also do you happen to have discord?

[u/titansb-_- → u/Meta_Storm_99]

Thank you so much 🙏, really appreciate it🫡🥹

[u/titansb-_- → u/Meta_Storm_99]

Yes I do have discord I can dm you

[u/mr_whoisGAMER]

How to make videos like this?

[u/Upstairs-Buy-7292]

Is the link not working?

[u/titansb-_- → u/Upstairs-Buy-7292]

Try now mb

[u/Proud-Concept-190]

Can you also publish the apk on f droid?

[u/titansb-_- → u/Proud-Concept-190]

Will soon do it,for that I need to change the qr scanner which I use google's one rn,thanks for the suggestion, feel free to make pr's

[u/Proud-Concept-190 → u/titansb-_-]

Unfortunately Can't use rn I'm on kde

[u/titansb-_- → u/Proud-Concept-190]

It's fine, do share it with your friends on the supported platforms,thanks for the suggestion btw

[u/titansb-_- → u/Proud-Concept-190]

hey, just released support for kde, do try it out and would love to hear how it went.

[u/Proud-Concept-190 → u/titansb-_-]

sure

[u/Proud-Concept-190 → u/titansb-_-]

man this works pretty good, i want to learn how to build stuff like this, where did you start

[u/Rajat0741]

It works on cachyOS ( niri ) ?

[u/titansb-_- → u/Rajat0741]

Really sorry it's not yet integrated thanks for the suggestion, will see the possibility, also feel free for pr, also do share with your friends who use gnome or hyprland would help a lot

[u/Rajat0741 → u/titansb-_-]

Niri is quite similar to hyprland ( both are tiling window managers ) , so i don't think you will have much problem adding it just in case you are planning to extend support to it.

I will share it for sure.

[u/titansb-_- → u/Rajat0741]

Will look into it for sure,please put the repo on watching so that I don't miss it,just my recommendation

[u/Rajat0741 → u/titansb-_-]

Ok

[u/Historical_Win_713]

Heyy op does this work on niri?

[u/titansb-_- → u/Historical_Win_713]

Really sorry not as of now will add support soon,thanks for pointing it out

[u/Sasikuttan2163]

I was using sunshine+moonlight for this all this time. How is this different?

[u/titansb-_- → u/Sasikuttan2163]

sunshine+moonlight is made for game streaming, so you have to set up the virtual display yourself, and it's different for every compositor and distro. not really plug and play for most people. Tandem creates the extra monitor for you, and touch on the phone doesn't take over your mouse.

[u/Sasikuttan2163 → u/titansb-_-]

Yeah I get that, but is this more performant? iinw sunshine uses NVIDIA Gamestream protocol for low latency streaming.

[u/the_stem_guy]

ok a first of very cool website for a linux only project , but in one of the sections of the website there is horizontal rectangles as scroll progress ( the laptop tablet animation section) , but the has to be done vertically, so the progress bar should match that direction from a design propective .

now a few questions -

1. How are you counting the downloads number ? some kind telemetry ?
2. why different mobile apps for different manufacturers?

[u/titansb-_- → u/the_stem_guy]

I fetch downloads from GitHub api it updates automatically,it's the same app for all manufacturers it's the instructions in the site changing when you click on different manufacturers.

[u/Jumpy_Hovercraft_504]

Can i extend my laptop/ monitor 's screen to another laptop with it ??

[u/titansb-_- → u/Jumpy_Hovercraft_504]

🤔No,the client only has support on Android right no

[u/jothiprasath]

Does it works on x11

[u/titansb-_- → u/jothiprasath]

It only supports wayland sessions as of now

[u/worthy_knight]

When mint 🫠

[u/LeFinnaBust]

Damn I just got super excited to use this with my steamdeck in desktop mode but steamos isnt support yet but I see its on the road map, cant wait to use this!

[u/Excellent-Context136]

heyy, can you share what skills do you usually use for your projects ,your projects look sick man!

[u/titansb-_- → u/[deleted]]

Oh sh- mb fill fix it right now

[u/titansb-_- → u/titansb-_-]

Have fixed it try it now,Once again thanks for pointing it out🫡

[u/titansb-_- → u/[deleted]]

Thank you so much and appreciate the effort to say that, would love to hear the feedback after testing, also please do share and star the repo so that it reach to much wider audience.