Comparison

QA² vs Bauhaus Echo

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

Head to head
About

QA²

Engage in a unique puzzle game set in the quantum world. Swipe and match colorful blocks to create satisfying chain reactions and master various game modes. Challenge AI opponents and compete on global leaderboards.

Highlights
  • Quantum-themed puzzle gameplay
  • Satisfying chain reaction system
  • Multiple game modes (Rush, Depth, Flow, Overload)
  • VS AI mode with challenging opponents
  • Global leaderboards for competitive play
  • Brain training mechanics
Read full description

■ Welcome to the Quantum World QA2 is a fresh new puzzle game themed around quantum computing. Swipe and match colorful blocks to trigger massive chain reactions! ■ Satisfying Chain System Match blocks to trigger chain reactions. The satisfaction of watching blocks disappear one after another is truly addictive! Use timing and strategy to pull off huge combos. ■ Multiple Game Modes 【Rush Mode】 Race against the clock for the highest score! 【Depth Mode】 How deep can you go? Challenge yourself! 【Flow Mode】 Relax and play at your own pace. 【Overload Mode】 Push your limits! A challenge for advanced players. ■ Battle AI Anytime Featuring VS AI mode with powerful AI opponents. Enjoy intense battles even when playing solo. ■ Compete on Global Leaderboards Compete with players from around the world. Aim for the #1 spot in the global rankings! ■ Perfect For • Puzzle game enthusiasts • Players who love the thrill of chain reactions • Those looking to train their brain • Anyone curious about quantum computing • People seeking a quick gaming session Dive into the world of quantum puzzles!

About

Bauhaus Echo

Features
Read full description

Remember the art. Rebuild the pattern. Bauhaus Echo is a visual memory puzzle game inspired by the bold shapes and colors of Bauhaus design. Study a composition, watch the tiles scatter, then drag them back into place. Simple to learn, satisfying to master. FIND YOUR WAY TO PLAY Classic: Memorize the grid and rebuild it from memory. Speed: Keep up as tiles arrive and the pressure builds. Endless: See how long you can last as the challenge grows. Memory Pairs: Flip tiles and find the matching artwork. Zen: Leave the timer behind and create your own compositions. Puzzle: Piece together artwork and discover its source. A COLLECTION WORTH EXPLORING Start with 500 core geometric tiles. Discover downloadable collections inspired by painting, Japanese prints, natural history, ornament, and space. Mix your favorite available packs for a different visual challenge. MAKE IT YOURS Choose your grid size and difficulty, explore different tile styles, and enjoy an original soundtrack. Between rounds, flick the playground tiles and watch them tumble and collide. LEARN BY PLAYING A guided tutorial introduces the basics. Progressive hints help when you need a nudge, while local high scores and milestones give you something to come back for. OPTIONAL PREMIUM A one-time Premium purchase removes ads and unlocks every Premium art pack, Premium modes, and styles. Additional art packs require an internet connection to download. A quick puzzle, a quiet creative break, or one more round. Make room for a little color.

Screenshots

QA²4 screens
Bauhaus Echo4 screens

Verdict

The call

The clearest difference is in-app purchases: QA² at none against Bauhaus Echo's 1. QA² also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement 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. Bauhaus Echo sells 1 one-off in-app purchase. QA² asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on November 5, 2026 and October 28, 2026 respectively.

Scorecard2 real differences · 6 level
QA² versus Bauhaus Echo: the parameters behind the verdict, then further details
ParameterQA²Bauhaus Echo
PriceFreeFree
Positive reviews50.0% of reviews—
Update frequencyEvery 3 weeksEvery 3 weeks
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size180 MB72 MB
Age rating4+4+
DeveloperTISI IncorporatedSuch Software

In-app purchases

None

QA²

No in-app purchases

1 purchases

Bauhaus Echo

One-time1
  • Remove Ads$1.99

Questions

Is QA² free?
QA² is free to download, with no in-app purchases.
Is Bauhaus Echo free?
Bauhaus Echo is free to download, with in-app purchases available.
Do QA² or Bauhaus Echo have ads?
Bauhaus Echo shows ads; QA² does not.
Which is updated more often, QA² or Bauhaus Echo?
QA² ships an update every 3 weeks, and Bauhaus Echo every 3 weeks. Most recently, QA² was updated on November 5, 2026 and Bauhaus Echo on October 28, 2026.

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