Yeah . The screen is one of the if not the worst offender . Less energy it ' s outputting the better . For background apps . On android press the previous apps icon and swipe the apps away . On iPhone double tap the home button and do the same . Some will say it ' s pointless as both systems have things that combat those apps using post when not being used but it ' s not perfect . Yeah if you log out of Facebook not close then I believe it will stop it checking for updates constantly so that ' ll hello . However the apps I mentioned will use less power while you use it too . <| sep |> Who accepted your work ? An agent ? You can ' t be sued for just having a similar structure to another book , but if your work has significant elements copied from another work , then there could be issues . On the other hand , even if there are no legal issues you don ' t want your work to seem extremely derivative of other books . It ' s hard to say where this falls without more details but maybe get a second opinion from someone you trust .