Stuck somewhere? The light is on.

Boo signs you in with a six-digit code by email — there is no password. The mail usually takes under a minute. If it is not there: look in spam or junk, check the address for a typo, and give it another minute. The code is good for one hour; after that tap "Send a new code" on the same screen. Still nothing after a second try? Write to the address above and say which email you used.

In the app: open the Me tab and tap "Delete account". Boo asks twice, and then it is gone — your profile, your answers, your reactions, your group memberships and your notebooks. Groups you created are handed over to another member, so nobody else loses their book. There is no undo, and Boo keeps no copy.

A group holds up to five people, the one who started it included. Everyone in it gets the same question on the same day. You write your own page first; the others' answers open only after that — the database enforces it, not just the app. You can stick a small sticker on an answer that got you. To join, you enter the code the group shares with you, like BOO-4821.

They leave with you. Leaving deletes everything you wrote in that group — your pages and your stickers — in the same step as your membership, so nothing of yours stays behind. The others keep theirs. Your personal notebook is not touched. The same happens if the group's creator removes you. So leave when you mean it: those pages cannot be brought back.

The twelve nights run from December 25 to January 5, one theme each evening. The notebook is free in Boo's bookshop; you can put it on your shelf before then and it stays sealed until the 25th — on December 24 it says "opens tomorrow". On January 1 you write your wishes and Boo seals them for a year. A night rolls over at 4 in the morning, so writing after midnight still counts as that evening, and you can catch up on a night you missed.

Yes. No ads, no tracking, no analytics, nothing to buy. Your journal, your groups and the Rauhnächte notebook are all included. During the beta Boo comes through Apple's TestFlight.

The app is in English and German — switch it under Me, "App language", where "System" follows your iPhone. The twelve Rauhnächte nights are in German too. The 366 questions of the daily journal are still English for now, and a question without a reviewed translation simply stays in English. More languages are planned.

Your personal notebook is visible only to you. An answer in a group is visible only to that group, and only to members who have already written their own page that day. That rule lives in the database, not in the app, so it holds even when something goes wrong in the interface.

Open their answer and choose "Report or block". A report comes to Boo and is read; the person is never told who sent it. Blocking hides their answers and reactions from you in every group you share, and you can undo it under Me, "Blocked people". If a group has stopped being a good place, you can leave it — see above for what that does to your pages.