Last updated: July 25, 2026
Need help with Stacks, found a bug, or have a suggestion? Email kpully@gmail.com and we'll get back to you.
Stacks uses your phone number to sign in — no password to remember. Enter your number, then enter the 6-digit code sent to you by text message.
Tap the + button on the Stacks tab to search for a book, then choose a shelf: To Read, Reading, or Read. Once a book is on your Read shelf you can rate it.
On the Friends screen, tap + and choose Find Friends to match your contacts against people already on Stacks, or Invite a Friend to share the app with someone who isn't on it yet.
Swipe left on a friend in your Friends list and tap Remove.
Swipe left on a book in your Stacks and tap Hide. Hidden books stay in your own shelves but are removed from your friends' feeds.
Go to Profile → Settings → Delete Account. This permanently removes your profile, reading activity, friend connections, and photo, and cannot be undone.
Still stuck? Email kpully@gmail.com.