Can you spell every word?
Spellstack is a word sort puzzle for Android. Pour letters between tubes until each stack spells one of the target words. It plays like water sort or ball sort, but the tubes hold letters instead of colors, so a tube only locks when it spells a real word, read from bottom to top.
HOW IT PLAYS
- Tap a tube to pick up its top letter, tap another tube to pour
- Letters read bottom to top, and a gold glow means that word is locked
- Undo and restart are always free
- Stuck? Peek at the words or ask for a hint that follows a real solving path (costs coins, or watch an optional short ad)
640 PUZZLES IN 9 WORLDS
Start with gentle three-letter words in Sprout Grove, then move through Letter Lane, Word Harbor, Puzzle Peak, The Lexicon, Cipher Coast, Glyph Canyon and Infinite Stack. The newest chapter, Amber Archive (puzzles 501 to 640), has rarer words and longer pours. Chapters open in order and your progress is saved on your device.
MORE WAYS TO PLAY
- Daily puzzle: a fresh board every day, and a streak to keep going
- Blitz: 60 seconds to clear as many stacks as you can
- Earn up to three stars on every level, fill star chests and collect coins
- Light and dark mode, plus large readable letters on phones and tablets
- Offline word game: no account and no sign-in
ADS AND PURCHASES
Spellstack is a casual letter-sort puzzle for a mixed audience 13 and older. It is family-friendly and not directed at children under 13. Ads are optional rewarded hints, occasional ads after campaign clears, and an app-open ad after five levels. A one-time purchase in Settings removes ads for that Google account.
FAQ
Is Spellstack like water sort?
Yes. The pour-and-stack feel is the same as water sort and ball sort. The difference is that a tube locks only when it spells a real word.
Does Spellstack work offline?
Yes. The campaign, Daily puzzle, Blitz and dictionary run on your phone. The internet is used only for ads and privacy choices.
Is there a Spellstack account?
No. Progress stays on the device.
Can I remove ads?
Yes. Remove ads is a one-time purchase in Settings, tied to your Google account. Restore purchases puts it back after a reinstall.
Can you spell every word? Pour letters between tubes. 640 offline puzzles.