Frequently Asked Questions

NOOK is a secure, end-to-end encrypted messaging app that puts your privacy first. Unlike other messaging apps, NOOK ensures that only you and the people you're chatting with can read your messages - not even we can access them.

1. Tap the '+' button on the main screen
2. Give your room a name
3. Choose a security option (optional)
4. Tap 'Create Room'

1. Open the room
2. Tap the settings icon (gear)
3. Go to 'INVITATION' section
4. Tap 'Generate QR Code'
5. Choose security mode and expiration time
6. Share the QR code with your camera or link

Premium (€1,99/month or €19,99/year):

• ✅ Unlimited rooms
• ✅ Unlimited members per room
• ✅ All QR security modes (Password, Security Question, Live Challenge)
• ✅ All 8 color themes

Free Plan:

• ✅ 1 room as owner
• ✅ Join 1 room as member
• ✅ Max 3 members per room
• ✅ Simple QR codes only
• ✅ 3 color themes
• ✅ Unlimited messages & attachments

When you try to use a Premium feature (like creating a 2nd room), the Premium screen will appear automatically. You can:

1. Choose Monthly (€1,99) or Yearly (€19,99)
2. Tap "Start Premium"
3. Confirm with Face ID / Touch ID

Yes! If you already subscribed on another device:

1. Open the Premium screen
2. Tap "Restore Purchases" at the bottom
3. Your Premium status will be restored automatically

End-to-end encryption means that your messages are scrambled on your device before being sent, and can only be unscrambled by the recipient's device. No one else - including NOOK, internet providers, or hackers - can read your messages.

For security! All invitations have a time limit:

• Open mode: 5-60 minutes (default: 10 min)
• Password/Q&A mode: 10 min - 24 hours (default: 10 min)
• Live Challenge: 5-60 minutes (default: 10 min)

This prevents old screenshots from being used indefinitely. Room owners can always generate a new invite code.

Yes! Room owners can change passwords or security questions:

1. Open Room Settings
2. Go to 'SECURITY' section
3. Tap 'Security Settings'
4. Enter current secret
5. Enter new secret

Yes, encrypted messages are stored on Apple's iCloud servers, but they remain encrypted. Think of it like a locked safe: the safe is stored at a facility, but only you have the key.

Your messages are safely stored in iCloud and tied to your Apple ID. When you install NOOK on a new device and sign in with the same Apple ID, you'll automatically get access to all your rooms and messages.

No. For privacy, new members can only see messages sent after they joined the room. This is especially true after a key rotation. Existing members can see all messages.

Owner: The person who created the room. Can invite people, kick members, delete the room, rotate encryption keys, and change security settings.

Member: Someone who joined the room. Can send messages and leave the room anytime.

Live Challenge is an interactive security layer where room owners verify each join request in real-time.

How it works:

1. Someone scans your invite code
2. You get a notification
3. You can ask them a custom question
4. They answer
5. You approve or reject their request

Perfect for private rooms where you want to verify each person manually. Live Challenge invites also expire after 5-60 minutes to prevent spam requests.

Key Rotation generates a new encryption key for your room. This is a security feature for room owners.

When to use:

• After kicking a member
• If you suspect unauthorized access
• After changing room password/question

What happens:

• A new encryption key is created
• All members automatically receive it
• Kicked members can no longer decrypt new messages
• Old messages remain readable for existing members

1. Open the room
2. Tap the settings icon (gear)
3. Scroll down and tap 'Leave Room'
4. Confirm your choice

Only room owners can delete rooms:

1. Open the room
2. Tap settings (gear)
3. Scroll to 'DANGER ZONE' section
4. Tap 'Delete Room for All'
5. Confirm - this cannot be undone!

All messages, attachments, and member data will be permanently deleted from iCloud.

1. Check your internet connection
2. Make sure you're signed in to iCloud
3. Try closing and reopening the app
4. If a message shows a red warning, tap to retry

• Check that you have the correct invite link or QR code
• If the room requires a password, make sure it's correct
• The room owner may have deleted the room
• Check your internet connection
• Free users: You can only join 1 room. Leave your current room or upgrade to Premium.

Free users can only create 1 room. To create more rooms, upgrade to NOOK Premium.

1. Make sure you're signed in to the same Apple ID on all devices
2. Check that iCloud Drive is enabled in iOS Settings
3. Try force-quitting and reopening NOOK