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About
Boltz is the most relaxing nuts & bolts sorting puzzle.
Unscrew colored nuts and stack each bolt until it holds a single color. Simple to learn, satisfying to master.
• Hundreds of handcrafted levels — every one is solvable
• No timers, no pressure — sort at your own pace
• Always an exit: free undo and extra bolts whenever you're stuck
• Real workshop sounds and a calm background loop, both switchable
• Colorblind mode and unlockable bolt themes
• Plays fully offline
Twist, sort, and relax. Download Boltz and start sorting.
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What's New in Nuts & Bolts Sort
1.2.0
September 5, 2026
Boltz has a voice now. Every action has its own workshop sound — the ratchet click when you pick up a bolt, a nut seating on the thread, a bright torque-wrench chime the moment a bolt is finished — plus a calm background loop. Sound and music each have their own switch in Settings. You can also SEE a bolt being finished: it gets a gold seal, and the nut you just moved lands with a squash. The coin balance is a button now. Tap it to open the shop from inside a level, and every spend shows the amount that left your pocket. The whole interface is translated into nine languages.
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Subscriptions & In-App Purchases
$2.99
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