Block Harmonics vs Slime Blocks
Price, ratings, monetisation and update history for both games, side by side ā with what reviewers say about each.
Block Harmonics
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With every placement, a gentle tone layers into a small harmonics. Block Harmonics is a clean, endlessly replayable placement puzzle: drop varied shapes onto an 8Ć8 board and clear filled rows and columns. Difficulty adapts gradually to your play. Build combos and simultaneous clears to push your score, and aim for a new personal best. ā Highlights ā ⢠Variety of pieces: from monomino to pentomino/hexomino. ⢠Smooth controls: tap to pick, drag to place, with helpful snapping. ⢠Scoring that rewards skill: combo chains, row/column simultaneous clears, perfect fits, area wipes, large-piece bonuses. ⢠Sound that feels good: tone and stereo change by color and position; combos sparkle with chords. Ambient BGM supports focus or relaxation. ⢠Settings: toggle SFX, 4-step volume, display handle name. ⢠Offline-friendly: scores are saved on device. Free to play. ā How to Play ā 1) Choose from three pieces and place them on the board. 2) Fill any row or column to clear it and score points. 3) Clear repeatedly to raise your combo multiplier. The game ends when no placement is possible. ā Tips ā ⢠Plan for multiple rows/columns at once. ⢠Aim for perfect fits to earn a bonus. ⢠Use large pieces and area clears to spike your score. ā About Ads ā Block Harmonics is free to play and supported by ads ā a banner at the bottom and an optional, skippable ad after game over. ā Privacy ā Scores and session data stay on your device. Google AdMob may collect anonymized information to serve ads. Compose your own little harmonics of color and shape.
Slime Blocks
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Slime Blocks is a block puzzle where every block is a slime with feelings. Drop pieces on the 8Ć8 board, fill a row or a column, and watch the slimes panic, laugh and cheer as it pops. 4 modes, 600+ levels, 22 skins to collect. Plays offline, no WiFi needed. MEET THE SLIMES Ruby, Blu, Sprout, Sunny, Grape, Tango, Pinky and Glitch: one slime for every colour. Clear two lines at once and the slime of the piece you placed takes the credit. 4 WAYS TO PLAY ⢠Classic: endless play. Your best score stays on screen, so you always know what to beat. ⢠Adventure: 600+ levels. Each level paints one pixel of a hidden picture. Finish 11 pixel paintings, from the Robot to the Heart to the Bomb, and find them in the Hall of Paintings. ⢠Block Rush: a ghost stole the slimes' candy! Chase it across 10 worlds against the clock, with a boss fight at the end of every world. Unlocks after 8 Adventure levels. ⢠Daily Challenge: a new challenge every day. Grow your streak, earn power-ups and compare scores on the Game Center leaderboards. COMBOS WITHOUT A CLOCK Clear a line, then another within your next 3 moves, and the combo keeps climbing. The combo doesn't run on time: think as long as you like and set up the big one. POWER-UPS Stuck? Use Shuffle, Laser, Splash or Storm to turn the game around. Earn them through achievements, score milestones and the Daily Challenge, or watch a short video for a free one. 22 SKINS TO COLLECT Cool Shades, Pirate Patch, Birthday Blob, Action Heroes and more. 10 skins are free: 4 from the start, 6 earned with achievements. The other 12 come with "Unlock All Skins". Skins are cosmetic: no advantage in play. 69 ACHIEVEMENTS Bronze, Silver, Gold and Diamond. Every achievement gives at least one power-up, and some unlock a skin. PLAYS OFFLINE Every mode plays without a connection: on a plane, on the metro, anywhere. Progress is saved on this device. Reward videos, purchases and leaderboards need the internet. FREE TO PLAY Slime Blocks is free with ads. Ads between games are capped: at most one every 2 minutes, never two games in a row. Optional in-app purchases: "Remove Ads", "Power-Up Pack", "Mega Power-Up Pack", "Unlock All Skins" and "Ultimate Bundle". "Restore Purchases" is in Settings. 11 LANGUAGES English, Ukrainian, French, German, Spanish, Japanese, Korean, Indonesian, Italian, Portuguese and Arabic. No account needed.
Screenshots
Verdict
The clearest difference is in-app purchases: Block Harmonics at none against Slime Blocks's 5. On price, update cadence, ads and device support there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. Slime Blocks sells 5 one-off in-app purchases. Block Harmonics asks for nothing beyond the download.
Block Harmonics ships an update every 9 days, Slime Blocks every 2 weeks. The most recent releases landed on November 5, 2026 and November 9, 2026 respectively.
| Parameter | Block Harmonics | Slime Blocks |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 9 days ā better | Every 2 weeks |
| Ads | Yes | Yes |
| In-app purchases | No ā better | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15.0 ā better |
| Further details ā not scored | ||
| Size | 31 MB | 71 MB |
| Age rating | 4+ | 4+ |
| Developer | Ikuya Terasaka | Mykola Ovcharenko |
In-app purchases
Block Harmonics
No in-app purchases
Slime Blocks
- Power-Up Pack$0.99
- Remove Ads$1.99
- Mega Power-Up Pack$1.99
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- Premium Skin Bundle$2.99
- Ultimate Bundle$3.99
Questions
Is Block Harmonics free?
Is Slime Blocks free?
Do Block Harmonics or Slime Blocks have ads?
Which is updated more often, Block Harmonics or Slime Blocks?
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