I have recently seen the new companion device feature that has been launched with the new Samsung tablets for clip studio, where the phone screen is used as a colour picker for the app on tablet.
I feel that that would be a great feature to add to krita too?
Yea, I was thinking that it would be very useful for using multitouch with a screen tablet (companion mode have the multitouch gestures too not just colour picking and shortcuts).
This reminds me of @Pulgacho’s post last year
its interesting - i think there are few discussion there how it can be done.
This is samsung to samsung - csp. Im getting the phone soonish. if work has not killed me yet I would want to investigate 
[but i dont have a tab]
I wonder how much latency will it have if its phone to pc / by bluetooth or wifi.
Was this not agreed before it would suck?
I feel like it would save a lot of screen realestate while i can have my phone next to me for tools, brush and colour select.
Could be useful for some things but not really for selection of colors. This was discussed in the topic linked to by @kaichi1342 already. The problem is that the color profiles have a great chance to not match so the color selected will always look different on both devices. In addition it would be annoying to unlock the phone every few minutes.
It was, considering the possible latency. Thats why i linked the thread.
its interesting how pulgacho’s idea come to life a few months later.
i think samsung solve that probably by being samsung to samsung + optimization with CSP. (though we don’t know the performance until someone would have both the s8 ultra dn s22 ultra / and does it work with prev ultras?)
Still interesting idea.
That’s probably it. I have Samsung TVs and had their phons too, for a while. They still have the possibility of easy screen sharing (between Samsung devices only), so you could play a YouTube video on your phone and it would show on the TV. I imagine this companion device thing is build on the screen sharing feature.
And two Samsung mobile devices are more likely to have similar colors too, which would make the color picker actually useful and they can prevent the phone from locking every few minutes.
Concerning latency, I’m using KDE Connect (even if it’s not exactly like the CSP companion, it’s a remote control for device<->device)
For mouse/keyboard, smartphone<>PC connected in wifi, there’s a small latency ~250ms I think (hard to get a precise measure).
To use smartphone as an additional input interface to just click on button for example, it’s not a problem.
If you try to do more, like updating sliders (or especially color sliders) it could be harder I think.
I don’t even think to draw 
After it seems there’s a CSP dedicated interface for the smartphone; in this situation maybe things could works faster if there’s a dedicated client/server with optimized protocol 
For example, KDE Connect provides a dedicated interface for basics media control; I don’t feel any latency (like I feel with mouse/keyboard) when using it.
Grum999
I totally forgot that KDE connect existet.
I didnt know about this one. now the only limit will be the turning on / off of screen. I guess a dedicated app that will tell the phone to not sleep - like how netflix / yt app do.
There seems to be way to do it. How useful it will be is debatable / with alot more restrictions - different pen/ different color on different device manufacturer.
[Im predicting a number of request for this once it rolls off / I feel like ill be seeing that in the future]
In remote control mode, KDE Connect prevent smartphone to sleep.
That’s not a real problem
Personally I use it for file sharing between smartphone<>PC, /clipboard sharing between smartphone<>PC, get smartphone notification on PC desktop, and multimedia control.
Other possibilities like remote control (use PC mouse/keyboard => smartphone // smartphone trackpad/keyboard ==> PC) I don’t really use it.
There’s some software for remote screen control (like VNC) but not sure about user experience…
Grum999
That’s nice to know.
OffTopic: I’m more interested with this. Like taking pics when you go out for reference, then drop it to PC. I’m using some other filesharing but its not fluid as I like.
This is how clip studio does it
other than colors those tools selection will be handy for someone like me who half of the time are away from my pc and just carry portable tablet. If this can be made to krita.
If i have time - ill investigate and experiment on how to make it / seems something fun to try.
Thank you very much😁
I dont think i have capability to pull it in any functional way. Experimenting on the other hand is different 
Cause im quite intrigue lol.
Oh naa im just happy that my idea is being concidered🤣