Comparison

BookDay vs Star Document Reader

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

Head to head
About

BookDay

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BookDay was created with the aim of encouraging young adults to build reading habits. It helps readers who want to insert more literature into their daily lives, but suffer from a lack of organization. Thinking about helping them, the application offers several features, such as: - Bookshelves dedicated to books you want to read or have already been read; - Vast number of literary works; - Scheduled reminders; - Custom annotations; - Monitoring the reading process. BookDay is a free application, developed by Isabella Gomes, Sofia Gelli and Vivian Bacelar.

About

Star Document Reader

Features
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Star Readers is a smart, modern reading tool for people who want to read documents, e-books and text files with clarity and comfort. Use AI features to summarize texts and understand them even faster. Whether you open PDF, EPUB, MOBI, TXT, CSV, Markdown, JSON or log files, Star Reader brings many useful formats into one clean app and keeps the focus where it belongs: on your content. It turns your mobile device into a versatile, elegant reader for everyday use, study, work and personal reading journeys. Highlights: - Elegant, minimal reader design - EPUB chapter view with navigation - MOBI reading with chapter and section navigation for DRM-free files - PDF viewer with annotations and image export - Share PDF annotations as images - Read text, Markdown, JSON and log files - View CSV files as a table or raw text - Favorites and recently opened files - Automatic reading position saving - Adjustable text size, line height and font style - Light, dark and system theme modes - English and German language options - File explorer for supported local files on your device Star Readers is built for longer reading sessions, with calm colors, clear typography and an interface that stays out of the way. Open local files, return to important documents faster and read e-books, notes, logs or tables in one app. Ideal for: - E-books and long-form reading - PDFs with visual annotations - Local document collections - Markdown notes - CSV files - JSON and log files - Focused reading by day or night Supported file extensions: .txt .csv .md .markdown .json .log .epub .pdf .mobi

Screenshots

BookDay4 screens
Star Document Reader4 screens

Verdict

The call

The clearest difference is update cadence: Star Document Reader at daily against BookDay's weekly. Star Document Reader also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.0). On price, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

BookDay ships an update weekly, Star Document Reader daily. The most recent releases landed on October 13, 2026 and October 15, 2026 respectively.

Scorecard3 real differences ยท 3 level
BookDay versus Star Document Reader: the parameters behind the verdict, then further details
ParameterBookDayStar Document Reader
PriceFreeFree
Update frequencyWeeklyDaily โ€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhoneiPhone, iPad, iPod โ€” better
Requires iOS16.013.0 โ€” better
Further details โ€” not scored
Size4 MB41 MB
Age rating4+4+
DeveloperFUNDACAO PADRE LEONEL FRANCAMarkus Stadi

In-app purchases

None

BookDay

No in-app purchases

None

Star Document Reader

No in-app purchases

Questions

Is BookDay free?
BookDay is free to download, with no in-app purchases.
Is Star Document Reader free?
Star Document Reader is free to download, with no in-app purchases.
Do BookDay or Star Document Reader have ads?
Neither BookDay nor Star Document Reader shows ads.
Which is updated more often, BookDay or Star Document Reader?
BookDay ships an update weekly, and Star Document Reader daily. Most recently, BookDay was updated on October 13, 2026 and Star Document Reader on October 15, 2026.

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