Comparison

Whale Mark vs Zerosec Note

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

Head to head
About

Whale Mark

Track your reading progress for physical books with this e-bookmark application. Log your current page, add notes, and manage your library of paperbacks. Stay organized and never lose your place again.

Highlights
  • Track reading progress for paper books
  • Log current page
  • Add notes to books
  • Manage book library
  • E-bookmark functionality
Features
Read full description

Whale Mark is an app for recording the reading progress of paper books. [Privacy Policy and Terms of Use] - Privacy Policy: https://medivhstudio.com/projects/whale-mark/privacy-policy.html - Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ [Contact Us] Any comments or questions can be sent to medivhstudio@163.com.

About

Zerosec Note

Features
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The 'Zerosec Note' app is a powerful tool designed to improve and enhance brain efficiency. It introduces an "extreme" method of note-taking to help users tackle challenges like slow thinking, difficulty gathering information, indecision, and procrastination. By "extreme," we mean you must complete one note in 1 minute and dedicate 10 minutes daily to write 10 notes. After several weeks of consistent practice, you'll notice significant improvements in your thinking abilities. The app draws inspiration from the bestseller "Zero Second Thinking" by Yuji Akaba, a former McKinsey consultant. In his book, Akaba shares how he used A4 paper to organize fragmented thoughts, focusing on 1-minute "mental exercises" to enhance thinking and boost productivity. The 1.0 release offers core features such as note-taking, countdown timers, viewing, and editing notes. Stay tuned for future updates with exciting new features!

Screenshots

Whale Mark4 screens
Zerosec Note4 screens

Verdict

The call

The clearest difference is in-app purchases: Zerosec Note at none against Whale Mark's 4. Zerosec Note also leads on update cadence (weekly vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Whale Mark sells 3 in-app purchases, starting at $0.99 per month. Zerosec Note asks for nothing beyond the download.

UpkeepUpdate frequency

Whale Mark ships an update every 4 months, Zerosec Note weekly. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

Scorecard2 real differences ยท 6 level
Whale Mark versus Zerosec Note: the parameters behind the verdict, then further details
ParameterWhale MarkZerosec Note
PriceFreeFree
Positive reviews100.0% of reviewsโ€”
Update frequencyEvery 4 monthsWeekly โ€” better
AdsNoNo
In-app purchasesYesNo โ€” better
MonetizationFreemiumโ€”
DevicesiPhone, iPad โ€” betteriPhone
Requires iOS17.016.4 โ€” better
Further details โ€” not scored
Size2 MB1 MB
Age rating4+4+
DeveloperๆŸฑ ๆจๅด‡ๆ—ญ ็Ž‹

In-app purchases

3 purchases

Whale Mark

Subscriptions2
  • Monthly Membership$0.991 Month
  • Annual Membership$2.991 Year
One-time1
  • Lifetime Membership2 variants$3.99
None

Zerosec Note

No in-app purchases

Questions

Is Whale Mark free?
Whale Mark is free to download, with in-app purchases available.
Is Zerosec Note free?
Zerosec Note is free to download, with no in-app purchases.
Do Whale Mark or Zerosec Note have ads?
Neither Whale Mark nor Zerosec Note shows ads.
Which is updated more often, Whale Mark or Zerosec Note?
Whale Mark ships an update every 4 months, and Zerosec Note weekly. Most recently, Whale Mark was updated on October 30, 2026 and Zerosec Note on October 28, 2026.

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