Comparison

Rumble in MRI vs Synonym Stack

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

Head to head
About

Rumble in MRI

Features
Read full description

The app "Rumble in MRI" is informative, entertaining and game based. It gives children between the age of 4 and 10, as well as their parents, the opportunity to prepare themselves for an MRI scan, and shows them why it is exciting to come for a scan.

About

Synonym Stack

This word game boosts your vocabulary by challenging you to find correct synonyms. Enjoy a clean, distraction-free experience designed for all ages to improve language skills at your own pace.

Highlights
  • Vocabulary building
  • Synonym matching
  • No timers or distractions
  • Play at your own pace
  • Intuitive interface
  • Ad-free upgrade available
Features
Read full description

The right word is a superpower. Synonym Stack trains it, one beautiful climb at a time. Read a real sentence, feel the meaning, then pick the true synonym from four tempting tiles. Simple to start, honestly hard to master, and every word you learn becomes another brick in your tower. FIVE WAYS TO PLAY • Today's Stack: one handcrafted daily puzzle. Five rungs, one chance, come back tomorrow • The Climb: a stage by stage journey through hand painted worlds, from the forest floor to the summit • Classic: no timer, no pressure, just you and the longest run you can build • Blitz: 60 seconds on the clock, stack as many words as you can • Sudden Death: one life, no net, how far can you go A WORD BANK BUILT WITH CARE Thousands of words and growing, every one reviewed by a human eye: real example sentences that show the word in the wild, choices that are fair but never easy, and a difficulty ladder that rises gently from everyday words to summit vocabulary. This is a game that respects words, and respects you enough to teach them properly. YOUR PROGRESS, EVERYWHERE • A word journal that remembers every word you have truly mastered • Daily streaks, XP levels and a library of unlockable word packs • Game Center leaderboards for your best Classic run and longest daily streak • iCloud sync carries your journal, level and streak across iPhone and iPad SYNONYM STACK PLUS Go Plus and the whole mountain opens: no ads anywhere, free revives in every mode, the full daily archive to replay any puzzle you missed, and every Plus word pack unlocked. Weekly, monthly and annual plans, with a 7 day free trial on monthly and annual. Subscriptions auto renew unless cancelled at least 24 hours before the period ends. Manage or cancel any time in your App Store settings. Privacy Policy: https://synonymstack.com/privacy Terms of Use: https://synonymstack.com/terms Whether you are sharpening your English, prepping for exams, or simply love words, five minutes a day here compounds. Start stacking today. The mountain is waiting.

Screenshots

Rumble in MRI4 screens
Synonym Stack4 screens

Verdict

The call

The clearest difference is in-app purchases: Rumble in MRI at none against Synonym Stack's 1. Rumble in MRI also leads on ads (none vs shown) and iOS requirement (8.0 vs 17.0). Synonym Stack's advantage is update cadence (every 3 weeks vs every 3 months). On price 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. Synonym Stack sells 1 one-off in-app purchase. Rumble in MRI asks for nothing beyond the download.

UpkeepUpdate frequency

Rumble in MRI ships an update every 3 months, Synonym Stack every 3 weeks. The most recent releases landed on September 30, 2026 and October 9, 2026 respectively.

Scorecard4 real differences · 4 level
Rumble in MRI versus Synonym Stack: the parameters behind the verdict, then further details
ParameterRumble in MRISynonym Stack
PriceFreeFree
Positive reviews—100.0% of reviews
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS8.0 — better17.0
Further details — not scored
Size326 MB56 MB
Age rating4+4+
DeveloperRegion SyddanmarkMOMENTUMLABAI PTY LTD

In-app purchases

None

Rumble in MRI

No in-app purchases

1 purchases

Synonym Stack

One-time1
  • Remove Ads$4.99

Questions

Is Rumble in MRI free?
Rumble in MRI is free to download, with no in-app purchases.
Is Synonym Stack free?
Synonym Stack is free to download, with in-app purchases available.
Do Rumble in MRI or Synonym Stack have ads?
Synonym Stack shows ads; Rumble in MRI does not.
Which is updated more often, Rumble in MRI or Synonym Stack?
Rumble in MRI ships an update every 3 months, and Synonym Stack every 3 weeks. Most recently, Rumble in MRI was updated on September 30, 2026 and Synonym Stack on October 9, 2026.

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