Comparison

「ヒロシマの記憶AR」 vs Math Bird Challenge

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

Head to head
About

「ヒロシマの記憶AR」

Experience historical accounts and materials related to the 1945 Hiroshima atomic bombing and the Peace Memorial Park before the bombing. Features the world's first holographic testimony from a survivor, aiming to inspire reflection on peace.

Highlights
  • AR/VR historical experience
  • Atomic bombing accounts and materials
  • Pre-bombing Peace Memorial Park visuals
  • Holographic survivor testimony
  • Peace reflection tool
Read full description

広島を拠点に平和活動を行なっているNPO法人ピースカルチャービレッジ(PCV)と世界中の観光地や史跡でAR/VRを活用した体験設計を行うタイムルーパー合同会社と共同で、最新テクノロジーを活用して1945年に広島に投下された原爆に関する体験談や資料、そして投下前の平和記念公園に関する資料をバーチャルに体験できる「ヒロシマの記憶AR」を開発致しました。 また、原爆被爆者として世界中で被爆証言を行う田中稔子さんの当時の体験談を後世に残し、伝承していく目的として、世界初の被爆体験ホログラムをアプリ内に組み込みました。 「ヒロシマの記憶AR」を通して、全ての人が平和に対して考えるきっかけになることを願っています。

About

Math Bird Challenge

This app makes learning arithmetic engaging by combining classic arcade gameplay with math challenges. Players tap to navigate obstacles while solving addition and subtraction problems, with difficulty increasing as their score rises. It's designed for children aged 5-12 to build math skills through fun, reward-based play.

Highlights
  • Arithmetic practice integrated with gameplay
  • Progressive difficulty levels
  • Strengthens mental arithmetic
  • Improves calculation speed
  • Works offline
  • Simple one-tap controls
Features
Read full description

Make math learning fun and addictive! Math Bird combines Flappy Bird gameplay with arithmetic practice, creating an educational experience kids actually love. HOW TO PLAY Tap to flap through pipes while solving math problems. Answer correctly to keep flying and beat your high score. The higher you score, the harder the challenges! KEY FEATURES Progressive Difficulty • Level 1: Single-digit addition (Score 0-9) • Level 2: Two-digit addition (Score 10-29) • Level 3: Addition and subtraction (Score 30-49) • Level 4: Advanced arithmetic (Score 50+) Educational Benefits • Strengthen mental arithmetic • Improve calculation speed • Build number sense and confidence • Practice addition and subtraction • Learn through reward-based gameplay Game Features • Cherry power-ups restore lives • Dynamic sky changes by time of day • Best score tracking • Simple one-tap controls • Colorful graphics for children • Works offline - play anywhere PERFECT FOR AGES 5-12 Ideal for elementary students learning arithmetic: • Kindergarten: Simple addition • First Grade: Building foundations • Second Grade: Mixed operations • Third Grade+: Advanced mental math WHY PARENTS LOVE IT Educational and Entertaining Math Bird disguises practice as play, so kids build skills while having fun. Safe Screen Time No distracting ads. No in-app purchases. Just focused math practice. Proven Learning Method Game-based learning improves retention and motivation through immediate feedback and rewards. Progress Without Pressure Children learn at their own pace. Progressive difficulty ensures appropriate challenge levels. LEARNING OUTCOMES Regular play helps children: • Solve problems faster and confidently • Develop stronger number sense • Improve mental calculation • Build positive math associations • Gain problem-solving skills WHAT MAKES US DIFFERENT Authentic Gameplay Genuinely fun Flappy Bird mechanics. Kids play because they enjoy it. Meaningful Learning Every tap requires mathematical thinking. Success requires correct arithmetic. Smart Difficulty Automatically adjusts to optimal challenge level. Instant Feedback Immediate results accelerate learning and maintain engagement. GET STARTED Download Math Bird and transform math practice from chore to adventure. Perfect for supplementing lessons, homework skills, car rides, and building confidence!

Screenshots

「ヒロシマの記憶AR」4 screens
Math Bird Challenge4 screens

Verdict

The call

The clearest difference is ads: 「ヒロシマの記憶AR」 at none against Math Bird Challenge's shown. 「ヒロシマの記憶AR」 also leads on monetization model (free vs ad-supported) and iOS requirement (11.0 vs 13.0). Math Bird Challenge's advantage is review sentiment (100% vs 67%). On price, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

Scorecard4 real differences · 4 level
「ヒロシマの記憶AR」 versus Math Bird Challenge: the parameters behind the verdict, then further details
Parameter「ヒロシマの記憶AR」Math Bird Challenge
PriceFreeFree
Positive reviews66.7% of reviews100.0% of reviews — better
Update frequencyEvery 6 months—
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree — betterAd-supported
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better13.0
Further details — not scored
Size531 MB36 MB
Age rating4+4+
DeveloperTIMELOOPER INCTomohiro Kosaka

Customer experience

「ヒロシマの記憶AR」

Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

Math Bird Challenge

Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

「ヒロシマの記憶AR」

No in-app purchases

None

Math Bird Challenge

No in-app purchases

Questions

Is 「ヒロシマの記憶AR」 free?
「ヒロシマの記憶AR」 is free to download, with no in-app purchases.
Is Math Bird Challenge free?
Math Bird Challenge is free to download, with no in-app purchases.
Do 「ヒロシマの記憶AR」 or Math Bird Challenge have ads?
Math Bird Challenge shows ads; 「ヒロシマの記憶AR」 does not.

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