I’m using 8 ESP8266 and 8 relay modules to control everything in my house. And I want all my house members to have access to this. So can I download Blynk app in everyone’s phone and login using my account so they can control anything they can’t?
Or Is there a limit on how many devices can one account be logged in at the same time?
I Don’t know.
But if you want to share the App and avoid other user to make changes to the project you can use the “Shared Access” option.
I have had 4 simultaneous Android devices that I can recall for sure… possibly 5…
I suggest you simply try and see for yourself what, if any, limit… based on the available house members/phones/tablets 