Comparison

Book Diary vs Marcus

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

Head to head
About

Book Diary

Features
Read full description

Description Your reading life, beautifully organized. Whether you're a casual reader or a bookworm, this app helps you track every book, capture your thoughts, and never forget what you've read. TRACK YOUR LIBRARY • Organize books by status: Currently Reading, Want to Read, Finished, or Abandoned • Search and add books instantly with cover art and details • See your reading journey at a glance JOURNAL YOUR THOUGHTS • Write notes and reflections for each book • Capture quotes, ideas, and moments that moved you • Build a personal archive of your reading history AI-POWERED INSIGHTS • Get smart suggestions and insights about your reading • Discover connections between the books you love BEAUTIFULLY DESIGNED • Clean, intuitive interface that stays out of your way • Elegant visuals that make tracking books a pleasure Your next great read is waiting. Start your reading journal today. Terms of Use: https://vadbeg.github.io/book-ai-journal/terms-of-use/ Privacy Policy: https://vadbeg.github.io/book-ai-journal/privacy-policy/

About

Marcus

Features
Read full description

Reading, without the friction. Marcus is the reading app made for restless minds. A calm tracker glides along the line to keep your eyes exactly where you are, so your attention stops slipping off the page. Import any EPUB or PDF and just read. WHY IT STICKS - Stay on the line - a gentle tracker keeps your place, at your pace - Stuck? Just ask - explain, summarize or recap without leaving the page - Every book, one tap away - import EPUB & PDF and pick up where you left off - Reading that rewards you - daily goals, streaks and achievements - A shelf that fills as you read - finished books become spines on your bookcase - Your thoughts, in one place - a notebook and a glossary of words you've learned - Share the lines you love - turn any quote into a beautiful card MADE FOR HOW YOUR BRAIN READS ADHD-first and dyslexia-friendly: the OpenDyslexic font, calm themes, read-along audio, and short daily goals that make five minutes count. No guilt, no noise - just no zero days. MARCUS PRO Unlimited explanations, summaries and recaps, all themes and the OpenDyslexic font, and advanced tracker styles. Read more. Struggle less. Start your first page today. Terms of Use: https://marcus.vuvee.me/terms Privacy Policy: https://marcus.vuvee.me/privacy

Screenshots

Book Diary3 screens
Marcus4 screens

Verdict

The call

The clearest difference is update cadence: Book Diary at every 2 days against Marcus's every 2 months. 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. Book Diary sells 1 in-app purchase, starting at $3.99 per month and Marcus sells 2 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Book Diary ships an update every 2 days, Marcus every 2 months. The most recent releases landed on October 16, 2026 and October 9, 2026 respectively.

Scorecard1 real difference · 5 level
Book Diary versus Marcus: the parameters behind the verdict, then further details
ParameterBook DiaryMarcus
PriceFreeFree
Update frequencyEvery 2 days — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
DevicesiPhoneiPhone, iPad — better
Requires iOS17.616.4 — better
Further details — not scored
Size2 MB65 MB
Age rating4+4+
DeveloperVADZIM TSITKOVukasin Rancic

In-app purchases

1 purchases

Book Diary

Subscriptions1
  • Premium Monthly$3.991 Month
2 purchases

Marcus

Subscriptions2
  • Marcus Pro Monthly$6.991 Month
  • Marcus Pro Annual$49.991 Year

Questions

Is Book Diary free?
Book Diary is free to download, with in-app purchases available.
Is Marcus free?
Marcus is free to download, with in-app purchases available.
Do Book Diary or Marcus have ads?
Neither Book Diary nor Marcus shows ads.
Which is updated more often, Book Diary or Marcus?
Book Diary ships an update every 2 days, and Marcus every 2 months. Most recently, Book Diary was updated on October 16, 2026 and Marcus on October 9, 2026.

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