Add Warhost to your home screen to open it full-screen like an app, with your saved lists available offline. No app store, no account.
iPhone / iPad (Safari): tap the Share icon (the square with an up-arrow), then Add to Home Screen.
Android (Chrome): tap the ⋮ menu, then Install app (or Add to Home screen).
Chrome / Edge (desktop): click the install icon at the right end of the address bar.
Then pick units. Warhost fits them into legal detachments for you.
From New Recruit: Export > Text > NR > Copy to Clipboard, then paste here. Warhost reads text and .ros files, not New Recruit links. You can also paste a list from Warhost's "Copy as text" or "Copy for chat", or type one yourself.