Comparison

Merge Bubbles vs Rule Shift

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. Test your vocabulary and logic in this addictive brain-training adventure.

Highlights
  • Merge word bubbles
  • Discover hidden categories
  • Complete word groups
  • Brain-training puzzles
  • Relaxing gameplay
  • 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

Rule Shift

This is a fast-paced reflex game where players must read and adapt to changing rules. Master over 200 levels with various challenges, unlock power-ups, and compete on leaderboards. It's easy to learn but difficult to master.

Highlights
  • Master 200+ levels
  • Multiple game modes (Levels, Endless, Daily Shift, Chaos)
  • Unlockable power-ups
  • Score building and medal system
  • Progress tracking and statistics
  • Game Center leaderboards
  • Customizable themes and settings
Features
Read full description

Follow the rule. Survive the shift. Rule Shift is a fast-paced reflex game that challenges you to read, react, and adapt. Every round gives you a clear instruction: tap the right targets, avoid the wrong ones, and stay ready because the rule can change when you least expect it. New rules are presented before play begins, giving you time to understand the challenge. When you are ready, tap BEGIN and put your reactions to the test. MASTER 200 LEVELS Start with the 50-level Classic campaign, then unlock 150 themed levels across Numbers, Letters, Directions, Symbols, Icons, and Mixed Shift. Each campaign introduces new objects, rule combinations, timing patterns, and modifiers. Replay completed levels to improve your score and earn better medals. CHOOSE YOUR CHALLENGE - Levels: Progress through deterministic, replayable challenges with medals and personal bests. - Endless: Keep adapting as the speed, density, and rule complexity increase. - Daily Shift: Take on a new seeded challenge each day and chase your daily best. - Chaos: Mix every content type into an unpredictable endless test. - Practice: Choose a rule and sharpen your skills without affecting high scores. - Tutorial: Learn the fundamentals through guided play. THINK FAST, BUT READ FIRST Rules may change during a level, combine into multi-part instructions, or be affected by Memory, Freeze, and Reverse modifiers. Each shift gives you a dedicated reading window before you decide when to begin. BUILD YOUR SCORE Tap early for reaction bonuses, maintain combos for larger multipliers, and survive rule shifts for bonus points. Earn Bronze, Silver, and Gold medals by balancing accuracy with speed. UNLOCK POWER-UPS Complete levels, earn medals, build combos, and reach new milestones to unlock helpful abilities. Highlight valid targets, slow the action, preview the next rule, protect a combo, clear distractors, and more. Equip one power-up before finite levels and use it when it matters most. YOUR PROGRESS, YOUR WAY - Replay any completed level - Track best scores, medals, combos, and detailed statistics - Sync campaign progress privately through iCloud - Compete on Game Center leaderboards - Customize the experience with unlockable themes, sound controls, haptics, and Reduce Motion support Rule Shift is easy to understand, quick to play, and increasingly difficult to master. Read the rule, trust your reflexes, and survive the shift.

Screenshots

Merge Bubbles3 screens
Rule Shift4 screens

Verdict

The call

Merge Bubbles and Rule Shift both sit at 4.9 stars, but that hides the real split: 100% of Rule Shift's written reviews are positive against 51% of Merge Bubbles's. Merge Bubbles's advantage is ratings volume (9.4K vs 1) and chart position (#5 vs unranked). On price, rating, ads and in-app purchases 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 and Rule Shift sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Merge Bubbles against 5.0 for Rule Shift. That said, the two scores are not equally well evidenced: Merge Bubbles has 9.4K ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 51% of Merge Bubbles's written reviews are positive against 100% of Rule Shift's.

Scorecard4 real differences · 7 level
Merge Bubbles versus Rule Shift: the parameters behind the verdict, then further details
ParameterMerge BubblesRule Shift
PriceFreeFree
Rating4.9 (9.4K ratings)5.0 (1 ratings) — better
Positive reviews51.3% of reviews100.0% of reviews — better
Number of ratings9.4K — better1
Update frequencyEvery 4 days—
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#5 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size384 MB21 MB
Age rating4+4+
DeveloperCheer GamesEJSmith

Customer experience

Merge Bubbles

All ratings7,992 ratings
Positive98.8%
Neutral0.5%
Negative0.7%
Written reviews78 reviews
Positive51.3%
Neutral9.0%
Negative39.7%

Rule Shift

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

10 purchases

Merge Bubbles

One-time10
  • Starter Pack$0.99
  • Coin 1500$1.99
  • Fail Offer$3.99
Show 7 more
  • 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
  • Coin 100000$99.99
1 purchases

Rule Shift

One-time1
  • Remove Ads$2.99

Questions

Is Merge Bubbles free?
Merge Bubbles is free to download, with in-app purchases available.
Is Rule Shift free?
Rule Shift is free to download, with in-app purchases available.
Which has better reviews, Merge Bubbles or Rule Shift?
Rule Shift is rated higher. Merge Bubbles averages 4.9 out of 5 from 9.4K ratings, while Rule Shift averages 5.0 from 1 ratings.
Do Merge Bubbles or Rule Shift have ads?
Both Merge Bubbles and Rule Shift show ads.

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