Comparison

Brain Training AHA vs DJDX

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

Head to head
About

Brain Training AHA

Features
Read full description

Stimulate Your Brain with ‘Aha!’ Moments! A Puzzle Game That Challenges You to Spot Gradual Changes in Images The exhilarating “Aha!” moment will have you hooked! A new kind of “spot the difference” brain-training puzzle game that stimulates your vision and brain! Experience the “Aha!” moment—where parts of an image gradually change—right in the palm of your hand. At first glance, they look like ordinary photos or illustrations… but something is slowly changing somewhere!? Sharpen your focus and spot the moment the change happens! ◆ Game Features The Satisfying “Aha!” Experience The exhilaration you feel the moment you notice the change after staring intently at the screen is unbeatable! It’s perfect for brain activation (brain training). A wealth of levels for everyone from beginners to experts Features a wide variety of challenges, including beautiful landscapes, cute illustrations, and scenes from everyday life! Quick play during spare moments Each level takes just a few dozen seconds to complete, making it perfect for commuting, on the way to school, or as a quick break to clear your head! ◆ Recommended for: ・Those who enjoy brain training, quizzes, and puzzle games ・Those who want to experience the thrill of an “Aha!” moment ・Those who want to improve their concentration and observational skills ・Those who are good at or enjoy spot-the-difference games ・Those looking for a free, casual game to pass the time So, can your brain spot the differences? Download now and enjoy the ultimate “Aha!” experience!

About

DJDX

This app helps rhythm game players manage and analyze their scores. It supports importing play data from various games and provides detailed statistics and trend analysis. Users can also view charts and customize their data display.

Highlights
  • Score data import (web/CSV)
  • Automatic data backup
  • Customizable data display
  • Score statistics and trends
  • Chart viewer (Textage, sdvx.in, YouTube)
  • External data source integration
Features
Read full description

DJDX is a score manager made for rhythm gamers. Seamlessly import, manage, and analyze your play sessions with ease. Supported Games - beatmania IIDX (SP and DP) - Sound Voltex - Polaris Chord - DanceDanceRevolution Features - Imports - Import score data from the web or manually choose a CSV file - Imported data is automatically backed up - Import history is stored for each import - Sessions (beta, IIDX only) - Take photos of your game’s result screen to automatically import scores - Works completely offline, even when the internet is spotty - Rich customizable analytics (some games only) - View an overall summary of your scores - Compare your last session with the one before that - View stats and trends per level - Chart viewer - View charts in Textage, sdvx.in, or YouTube - External data sources - Import data from the unofficial wiki and other data sources to calculate score rates and show each chart’s notes radar - Free, without ads, forever

Screenshots

Brain Training AHA3 screens
DJDX4 screens

Verdict

The call

The clearest difference is update cadence: DJDX at weekly against Brain Training AHA's every 33 months. Brain Training AHA's advantage is iOS requirement (15.0 vs 18.6). On price, ads, 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.

UpkeepUpdate frequency

Brain Training AHA ships an update every 33 months, DJDX weekly. The most recent releases landed on October 2, 2026 and October 13, 2026 respectively.

Scorecard2 real differences · 8 level
Brain Training AHA versus DJDX: the parameters behind the verdict, then further details
ParameterBrain Training AHADJDX
PriceFreeFree
Rating—3.0 (2 ratings) — better
Positive reviews—42.9% of reviews
Number of ratings—2 — better
Update frequencyEvery 33 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS15.0 — better18.6
Further details — not scored
Size22 MB75 MB
Age rating4+4+
Developeryuzuru watanabeJustin Xin

In-app purchases

None

Brain Training AHA

No in-app purchases

None

DJDX

No in-app purchases

Questions

Is Brain Training AHA free?
Brain Training AHA is free to download, with no in-app purchases.
Is DJDX free?
DJDX is free to download, with no in-app purchases.
Do Brain Training AHA or DJDX have ads?
Neither Brain Training AHA nor DJDX shows ads.
Which is updated more often, Brain Training AHA or DJDX?
Brain Training AHA ships an update every 33 months, and DJDX weekly. Most recently, Brain Training AHA was updated on October 2, 2026 and DJDX on October 13, 2026.

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