Comparison

Známkulačka vs Reading Diary

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

Head to head
About

Známkulačka

This app helps students calculate their average grades. It can determine the lowest possible grade to maintain the current average or calculate the grades needed to improve by one level. It's a straightforward tool for academic progress tracking.

Highlights
  • Calculate average grade
  • Determine lowest possible grade
  • Calculate grades needed for improvement
  • Simple interface
Features
Read full description

Jednoduchá aplikácia na výpočet priemeru zo známok. Aplikácia Známkulačka (kalkulačka na známky) vám pomôže s výpočtom priemeru známok, zistí, akú najhoršiu známku môžete dostať, aby sa nezhoršila aktuálna známka či vypočíta, aké známky budete potrebovať, aby vaša známka stúpla o jeden stupeň.

About

Reading Diary

Organize your personal book collection by tracking, categorizing, and filtering your library. Add books by scanning barcodes or manually entering details. Share your reading progress and book information with friends.

Highlights
  • Track and categorize books
  • Scan barcodes for easy entry
  • Manual book detail entry
  • Filter and sort library
  • Share book information
  • Cross-device synchronization
  • Day/night theme
Features
Read full description

Reading Diary is a simple book tracker and reading log for your personal library. Scan an ISBN or barcode to add books, track what you're reading, organize your shelves and build your TBR list, and see your reading stats. Pay once. No subscription. No ads. The free version lets you: - Add a book by scanning its barcode* - Search for books by ISBN, author, or title* - Add a book and enter its details manually - Enter book details: author, title, ISBN, category, book format (paperback, hardcover, e-book, audiobook, or other), reading status, date added, date you started reading, date you finished or abandoned it, book color, rating, and note - View the book cover* - Share book information with friends (author, title, note, and, when available, a link to more information or a cover image) - Filter books in the navigation drawer by reading status (not read yet, currently reading, finished, or abandoned), author, category, and format - Search for books by author, title, category, or note - Create an account and sync your data across all your devices** - Back up your data to a JSON file and restore it from that file - Use light or dark mode according to your device settings A one-time Premium purchase also unlocks: - Add your own cover photo if no cover is available online (sign-in required) - Set a book's ownership (whether you own it, borrowed it, or want it) and assign it to a shelf - Create custom tags and assign as many tags as you like to books - Enter the number of pages and the audiobook length in hours and minutes - Filter books in the navigation drawer by ownership, shelf, and tags - View detailed reading statistics - Share a reading summary for a selected period and your wishlist with friends * We use the Google Books and Goodreads services to search for books and retrieve information about them. If a book cannot be found, it is probably not in their databases. A book cover may not be available. ** You can register using an email address and password or a Google or Apple account.

Screenshots

Známkulačka1 screens
Reading Diary4 screens

Verdict

The call

The clearest difference is review sentiment: Reading Diary at 80% against Známkulačka's 0%. Reading Diary also leads on update cadence (every 2 months vs every 30 months). Známkulačka's advantage is in-app purchases (none vs 1). On price, ads, device support and iOS requirement 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. Reading Diary sells 1 one-off in-app purchase. Známkulačka asks for nothing beyond the download.

UpkeepUpdate frequency

Známkulačka ships an update every 30 months, Reading Diary every 2 months. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 6 level
Známkulačka versus Reading Diary: the parameters behind the verdict, then further details
ParameterZnámkulačkaReading Diary
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews0.0% of reviews80.0% of reviews — better
Number of ratings—1 — better
Update frequencyEvery 30 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.0 — better15.6
Further details — not scored
Size0 MB62 MB
Age rating4+4+
DeveloperPinf s.r.o.Zdenek Skrobak

Customer experience

Známkulačka

Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Reading Diary

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive80.0%
Neutral20.0%
Negative0.0%

In-app purchases

None

Známkulačka

No in-app purchases

1 purchases

Reading Diary

One-time1
  • Premium$8.19

Questions

Is Známkulačka free?
Známkulačka is free to download, with no in-app purchases.
Is Reading Diary free?
Reading Diary is free to download, with in-app purchases available.
Do Známkulačka or Reading Diary have ads?
Neither Známkulačka nor Reading Diary shows ads.
Which is updated more often, Známkulačka or Reading Diary?
Známkulačka ships an update every 30 months, and Reading Diary every 2 months. Most recently, Známkulačka was updated on October 21, 2026 and Reading Diary on October 24, 2026.

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