Comparison

Book vs Emotional Brain Study

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

Head to head
About

Book

Navigate challenging mazes, collect letters, and spell words to win. Outsmart enemies with spells and uncover hidden bonuses. Compete in daily challenges to maintain streaks and earn high scores in this classic arcade-style word game.

Highlights
  • Navigate mazes
  • Collect letters
  • Spell words to win
  • Avoid enemies (Blots)
  • Cast Slow-Down spells
  • Find hidden letters and bonuses
  • Daily Challenges
Features
Read full description

Help Book-Man navigate mysterious mazes to collect letters while avoiding the diabolical Blots! Spell the word to win each level while racking up points and grabbing helpful bonuses. Outsmart the Blots by casting Slow-Down spells and uncovering hidden letters! Keep your streak going and earn extra points with Daily Challenges. Get the word game that’s packed with classic arcade action! Get Book-Man! From the creators of TheFreeDictionary.com, the massively popular online dictionary.

About

Emotional Brain Study

Features
Read full description

Are you good at ignoring emotional distraction? Can you control what emotional information to remember and what to forget? Neuroscientists and emotion researchers at University College London (UCL) think these abilities are related to how we feel. Find out for yourself by playing these fun games and help advance science while you play! In this study scientists from the UCL Institute of Cognitive Neuroscience are exploring how much control people have over experiencing emotions, how this relates to their mood and how this changes over time. Each time you use the app to play a game and record your mood you will be contributing to this scientific study and you’ll be helping the neuroscientists to understand the mind’s emotional control system. The app will help you track your mood. Over time you can track your mood and emotional control performance pattern to find out whether your own mood is changing as a function of your control ability or not. The app will also allow you to measure your emotional control ability and compare it to other players’ ability. Running this study in the general population through an app provides the researchers with a unique opportunity to understand how these processes operate in everyday life. This information is very useful to advance our understanding of how mood can be improved in individuals who frequently experience low mood. Data privacy: Your data privacy is important to us. All data collected as part of this study is fully anonymised. No personally relevant information will be collected and the anonymous data that is being collected is used only for scientific research. Funding: The app is supported by the Wellcome Trust.

Screenshots

Book4 screens
Emotional Brain Study4 screens

Verdict

The call

The clearest difference is in-app purchases: Emotional Brain Study at none against Book's 7. Emotional Brain Study also leads on ads (none vs shown) and iOS requirement (9.0 vs 16.0). Book's advantage is update cadence (every 2 months vs every 5 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. Book sells 7 one-off in-app purchases. Emotional Brain Study asks for nothing beyond the download.

UpkeepUpdate frequency

Book ships an update every 2 months, Emotional Brain Study every 5 months. The most recent releases landed on November 2, 2026 and October 26, 2026 respectively.

Scorecard4 real differences · 6 level
Book versus Emotional Brain Study: the parameters behind the verdict, then further details
ParameterBookEmotional Brain Study
PriceFreeFree
Rating4.4 (272 ratings) — better—
Positive reviews68.5% of reviews—
Number of ratings272 — better—
Update frequencyEvery 2 months — betterEvery 5 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.09.0 — better
Further details — not scored
Size48 MB55 MB
Age rating4+12+
DeveloperFarlex, Inc.H2 Cognitive Designs LTD

Bugs and requests

Book

Reported bugs

8 issues
  • Book-Man doesn't follow directional movements
  • Book-Man goes through walls
  • Game crashes to home page
  • Book-Man freezes during play
  • Cannot unlock next level with a key
Show 3 more
  • Login fails
  • Protagonist gets stuck at end of row/column
  • Android bugs

Requested features

8 requests
  • More levels or zones
  • More languages
  • Different game styles
  • More 'Book-Man' heroes
  • Ability to earn keys without purchase
Show 3 more
  • Hyperdrive or speed-up option for 'Book-Man'
  • New themes
  • More directions/tutorials

Emotional Brain Study

Not enough reviews yet to summarise bugs or requests.

In-app purchases

7 purchases

Book

One-time7
  • 15 coins$0.99
  • 40 coins$1.99
  • 65 coins$2.99
Show 4 more
  • 100 coins$3.99
  • 200 coins$6.99
  • 300 coins$9.99
  • 1000 coins$29.99
None

Emotional Brain Study

No in-app purchases

Questions

Is Book free?
Book is free to download, with in-app purchases available.
Is Emotional Brain Study free?
Emotional Brain Study is free to download, with no in-app purchases.
Do Book or Emotional Brain Study have ads?
Book shows ads; Emotional Brain Study does not.
Which is updated more often, Book or Emotional Brain Study?
Book ships an update every 2 months, and Emotional Brain Study every 5 months. Most recently, Book was updated on November 2, 2026 and Emotional Brain Study on October 26, 2026.

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