Stacklear Icon Stacklear
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8×8 Block Merge × Line Clear iOS & iPadOS · Offline & Ad-Free

Place, Merge, Detonate.
Chain Your Way to Lv5.

Stacklear blends polyomino placement with 5-tier color evolution on an 8×8 board. Connect matching blocks to evolve from Lv1 to a Lv5 star blast, shatter ice, defuse ticking bombs, and master 500 handcrafted levels.

Lv1 Tile → Lv2 Tile → Lv3 Tile → Lv4 Tile → Lv5 Star Tile Lv1–Lv5 Evolution · Max-Level Star Blast
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500 Levels 10 Worlds + Boss Stages
Lv1→Lv5 5-Tier Merge & Blast
Endless High-Score Survival Mode
100% Local No Ads · No IAP · No Login

How It Works in 3 Steps

Designed for effortless one-handed portrait play with deep spatial strategy.

STEP 01 · DRAG & PLACE

Drop Polyomino Pieces onto the 8×8 Grid

Each round deals 3 block pieces in your tray. Read the board layout and place each piece where colors and lines align.

STEP 02 · MERGE & EVOLVE

3 Lv1 Blocks Make Lv2; Pair Up to Reach Lv5

Connect 3 touching Lv1 blocks of the same color to merge into Lv2. From Lv2 to Lv5, just 2 touching blocks of the same color and level evolve—and merging two Lv5 blocks triggers a board-clearing star blast!

STEP 03 · CLEAR & DEFUSE

Fill Rows & Columns, Shatter Ice & Defuse Bombs

Complete full rows or columns for instant line clears. Break frozen ice tiles, work around stone blockers, and defuse countdown bombs by merging or clearing adjacent cells before they reach zero.

Built for Puzzle Purists

Simulation-verified difficulty curves meet tactile candy-3D visuals.

10 Thematic Worlds · 500 Levels

Journey through Candy Sky, Mint Garden, Sunset Dunes, and beyond—50 handcrafted, solver-verified levels per world complete with Boss challenges.

Tactical Board Mechanics

Outsmart frozen Ice blocks, unmovable Stone obstacles, and ticking Bombs that reward smart positioning and chain merges.

Endless Mode & Fair Spawner

Chase personal records in Endless Mode, backed by a smart piece spawner that prevents unfair dry streaks.

3-Star Mastery & Coin Revive

Finish goals with more moves remaining to earn up to 3 stars and in-game coins. Spend 50 earned coins to revive once per attempt.

Reduce Motion & Comfort Controls

Enjoy crisp audio, gentle haptics, high-contrast WCAG-compliant UI, and a built-in Reduce Motion toggle for relaxed sessions.

Version 1 Privacy Promise

No accounts, no ads, no in-app purchases, and zero third-party analytics or tracking SDKs in Version 1. Your progress stays 100% on your device.