Comparison

Merge Bubbles vs Letter Gravity

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Merge Bubbles

A relaxing word puzzle game where you merge related word bubbles to discover categories and complete word groups. It's an addictive brain-training adventure that tests vocabulary and logic.

Highlights
  • Merge word bubbles
  • Discover hidden categories
  • Complete word groups
  • Relaxing gameplay
  • Brain-training puzzles
  • Vocabulary and logic challenges
Read full description

Merge Bubbles is a fresh and satisfying word puzzle game combining word associations with relaxing bubble merging gameplay. Merge matching word bubbles, discover hidden categories, and complete clever word groups in this addictive brain-training adventure. Each bubble contains a word. Your goal is simple: merge related words together. When you successfully collect 4 words from the same category, you complete the set and unlock more bubbles to continue your journey. Easy to learn but challenging to master! Merge Bubbles combines relaxing gameplay with smart word association puzzles that will test your vocabulary and logic. Whether you enjoy word games, matching puzzles, or relaxing brain teasers, Merge Bubbles offers a unique and rewarding experience. HOW TO PLAY: - Merge word bubbles together: Find words that belong to the same category and merge their bubbles. - Complete categories: Collect 4 related words to finish a category and clear space on the board. - Unlock new bubbles: As you progress, more word bubbles drop into your level, creating new challenges and opportunities. - Think ahead: Plan your merges carefully to avoid passing your move count.

About

Letter Gravity

Features
Read full description

App Store Description Welcome to Letter Gravity, the gravity-defying word puzzle game where physics meets spelling! Think fast, spell smart, and clear the board in a cosmic cascade of falling letters. Letter Gravity is not your average word game. Instead of static boards, letters drop onto the grid, shifting and settling under the influence of real-time gravity. Drag to spell words horizontally or vertically to clear tiles and keep your screen clean. As the blocks pile up, the pressure rises—how long can you survive the cascade? To help (or hinder) you, the cosmos will drop unique Special Blocks onto your board, turning every game into a dynamic strategic puzzle: GALAGA SPACESHIP: Lock onto the grid, load your missiles, and tap to blast away problematic blocks! JELLY TILE: Cyclical letters that swap state—time your tap to lock in the perfect vowel or consonant before it lands. VOLCANIC MAGMA: Volcanic heat that burns away adjacent tiles, clearing the grid in a flash of heat. TESLA COILS: Align them horizontally or vertically to trigger an electrical discharge, clearing entire rows and columns. HELIUM BALLOONS: Reverses gravity for individual letters, rising up to shake up your board arrangements. HEAVY METAL: Massive iron blocks that crash downwards, smashing through lower tiles to clear space. TELEPORTER: Swap any two tiles on the board to build massive, high-scoring words. WILD DICE: Spin the dice to get a random letter helper when you need it most. TWO THRILLING GAME MODES: Endless Survival: Play at your own pace across Easy, Medium, and Hard difficulties. The speed increases as your score grows—stay calm and keep spelling! Timed Blitz: Race against the clock in frantic 5-minute or 10-minute sprints. No tutorials, no hand-holding—just pure spelling speed. COMPETE GLOBALLY: With full Apple Game Center integration, every game mode and difficulty has its own global leaderboard. Challenge friends, track your high scores, and see where you rank among word-smiths worldwide! KEY FEATURES: Physics-Based Spelling: A unique blend of arcade action, physics, and spelling mechanics. 8 Special Blocks & Hazards: Keep your strategy fresh with lasers, lava, lightning, and balloons. Sleek Space Aesthetics: Beautiful dark mode graphics, smooth particle explosions, and custom animations. Immersive Sound & Haptics: Procedural synthesizers, retro sound effects, and physical haptic feedback that makes every word pop feel satisfying. Dictionary Validation: Uses a full tournament Scrabble dictionary to validate your words instantly. Play Offline: Perfect for commutes, flights, and offline play. Download Letter Gravity today and let gravity test your vocabulary!

Screenshots

Merge Bubbles3 screens
Letter Gravity4 screens

Verdict

The call

The clearest difference is in-app purchases: Letter Gravity at none against Merge Bubbles's 10. Letter Gravity also leads on ads (none vs shown). Merge Bubbles's advantage is chart position (#4 vs unranked) and iOS requirement (15.0 vs 18.6). On price, update cadence and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Merge Bubbles sells 10 one-off in-app purchases. Letter Gravity asks for nothing beyond the download.

UpkeepUpdate frequency

Merge Bubbles ships an update every 4 days, Letter Gravity every 6 days. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 7 level
Merge Bubbles versus Letter Gravity: the parameters behind the verdict, then further details
ParameterMerge BubblesLetter Gravity
PriceFreeFree
Rating4.9 (15K ratings) — better—
Positive reviews53.2% of reviews—
Number of ratings15K — better—
Update frequencyEvery 4 days — betterEvery 6 days
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
Best chart rank#4 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better18.6
Further details — not scored
Size284 MB34 MB
Age rating4+4+
DeveloperCheer GamesJAMES RICHARD DE HAAN

In-app purchases

10 purchases

Merge Bubbles

One-time10
  • Starter Pack$0.99
  • Coin 1500$1.99
  • Halloween Offer$2.99
Show 7 more
  • Fail Offer$3.99
  • Boost Pack$8.99
  • Coin 7000$8.99
  • No Ads$9.99
  • No Ads Pack$19.99
  • Coin 25000$29.99
  • Coin 50000$59.99
None

Letter Gravity

No in-app purchases

Questions

Is Merge Bubbles free?
Merge Bubbles is free to download, with in-app purchases available.
Is Letter Gravity free?
Letter Gravity is free to download, with no in-app purchases.
Do Merge Bubbles or Letter Gravity have ads?
Merge Bubbles shows ads; Letter Gravity does not.
Which is updated more often, Merge Bubbles or Letter Gravity?
Merge Bubbles ships an update every 4 days, and Letter Gravity every 6 days. Most recently, Merge Bubbles was updated on November 7, 2026 and Letter Gravity on October 31, 2026.

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