The 20 most popular Paid Books & Reference Apps for Android ever

Check out the top Books & Reference Apps which are a paid download. We went through all Books & Reference Apps for Android on Google Play in May 2025 and picked the best ones for you to download onto your Android phone. This Android app list is sorted by the all-time number of downloads. Last updated on 2025-05-21.

Used by arborists, fishermen, firefighters, climbers, military and boy and girl scouts the world over, Knots 3D will quickly teach you how to tie even the most difficult knot! Knots 3D is the ori…

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1,000,000+ downloads

Books & Reference

Nynix LLC
1,000,000+ downloads
BOOKS_REFERENCE

Used by arborists, fishermen, firefighters, climbers, military and boy and girl scouts the world over, Knots 3D will q…

Moon+ Reader Pro

**************** 1,000,000+ downloads, The #1 Paid EBook Reader in Google Play, 30-Day Money Back Guarantee! **************** All-in-one ebook documents management and better designed book reader wi…

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1,000,000+ downloads

Books & Reference

Moon+
1,000,000+ downloads
BOOKS_REFERENCE

Moon+ Reader Pro

**************** 1,000,000+ downloads, The #1 Paid EBook Reader in Google Play, 30-Day Money Back Guarantee! **********…

WolframAlpha Classic

Wolfram Group LLC

Use the power of Wolfram's computational intelligence to answer your questions. Building on 35+ years of development led by Stephen Wolfram, Wolfram|Alpha is the world's definitive source for instant…

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1,000,000+ downloads

Books & Reference

Wolfram Group LLC
1,000,000+ downloads
BOOKS_REFERENCE

WolframAlpha Classic

Use the power of Wolfram's computational intelligence to answer your questions. Building on 35+ years of development le…

It is the end of summer. Han Hui, a university student, meets a mysterious young girl named He Jia in the mountains. After this chance meeting, the two embark on a delightful journey. Shan Gui is a …

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100,000+ downloads

Books & Reference

ZiX Solutions
100,000+ downloads
BOOKS_REFERENCE

It is the end of summer. Han Hui, a university student, meets a mysterious young girl named He Jia in the mountains. Af…

Lunescope Pro: Moon Phases+

🌕🌖🌗🌘🌑🌒🌓🌔🌕 Spectacular, interactive 3D simulation of the moon, right down to the shadows in the craters and earthshine on the dark side. Touch screen control changes date and time as seen fr…

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100,000+ downloads

Books & Reference

Udekowski LLC
100,000+ downloads
BOOKS_REFERENCE

Lunescope Pro: Moon Phases+

🌕🌖🌗🌘🌑🌒🌓🌔🌕 Spectacular, interactive 3D simulation of the moon, right down to the shadows in the craters and ea…

ReadEra Premium – ebook reader

ReadEra Premium — a unique tool for searching, reading, and managing books and documents. The app allows you to automatically locate all supported books and documents on your device, search fo…

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100,000+ downloads

Books & Reference

READERA LLC
100,000+ downloads
BOOKS_REFERENCE

ReadEra Premium – ebook reader

ReadEra Premium — a unique tool for searching, reading, and managing books and documents. The app allows you to …

iQuran – القران الكريم

Beehive Innovation FZE

******************************************** ** NEWS ** ** iQuran will now be sold for a fraction of its original price, down to $1.99 from $6.99. InshAllah ** the new price effectively makes iQuran…

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100,000+ downloads

Books & Reference

Beehive Innovation FZE
100,000+ downloads
BOOKS_REFERENCE

iQuran – القران الكريم

******************************************** ** NEWS ** ** iQuran will now be sold for a fraction of its original pric…

FBReader Premium

FBReader.ORG Limited

The Premium Edition of the popular ebook reader. Features available in this premium version: * Reading aloud (via Android text-to-speech) * Google Translate and DeepL integration * Built-in support …

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100,000+ downloads

Books & Reference

FBReader.ORG Limited
100,000+ downloads
BOOKS_REFERENCE

FBReader Premium

The Premium Edition of the popular ebook reader. Features available in this premium version: * Reading aloud (via Andr…

Dictionary - M-W Premium

Merriam-Webster Inc.

Get America’s most useful and respected dictionary, optimized for your Android device. Continuously updated with the newest words and meanings, this is the premier Android app for English langu…

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100,000+ downloads

Books & Reference

Merriam-Webster Inc.
100,000+ downloads
BOOKS_REFERENCE

Dictionary - M-W Premium

Get America’s most useful and respected dictionary, optimized for your Android device. Continuously updated with …

CCW – Concealed Carry 50 State

Workman Consulting LLC

This comprehensive app empowers the law-abiding CCW (concealed or open carry permit) holder (or anyone who wants to lawfully transport a firearm in any state.) It gives you direct information needed …

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100,000+ downloads

Books & Reference

Workman Consulting LLC
100,000+ downloads
BOOKS_REFERENCE

CCW – Concealed Carry 50 State

This comprehensive app empowers the law-abiding CCW (concealed or open carry permit) holder (or anyone who wants to law…

e-Sword: Bible Study to Go

TL;DR— So many Biblical resources are freely included which other apps charge hundreds of dollars to unlock! BIBLES American Standard Version Berean Study Bible Bible in Basic English Brenton'…

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100,000+ downloads

Books & Reference

Rick Meyers
100,000+ downloads
BOOKS_REFERENCE

e-Sword: Bible Study to Go

TL;DR— So many Biblical resources are freely included which other apps charge hundreds of dollars to unlock! BIB…

The Cat in the Hat - Dr. Seuss

Oceanhouse Media, Inc.

On Sale for a limited time only. Happy Birthday Dr. Seuss! Join the Cat in the Hat in this interactive book app as he stirs up some mischief while Dick and Sally's mother is out and about! Explore p…

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100,000+ downloads

Books & Reference

Oceanhouse Media, Inc.
100,000+ downloads
BOOKS_REFERENCE

The Cat in the Hat - Dr. Seuss

On Sale for a limited time only. Happy Birthday Dr. Seuss! Join the Cat in the Hat in this interactive book app as he …

Calibre Companion

"100 Best Android Apps of 2019" - PCMag (https://www.pcmag.com/article/362295/the-100-best-android-apps) Calibre Companion (CC), recommended by calibre developers, is three applications in…

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100,000+ downloads

Books & Reference

Samuel Cohen
100,000+ downloads
BOOKS_REFERENCE

Calibre Companion

"100 Best Android Apps of 2019" - PCMag (https://www.pcmag.com/article/362295/the-100-best-android-apps) Cal…

Librera PRO - Book reader

Librera Reader PRO is an easy-to-use and highly configurable reading app that supports most popular document formats, including: PDF, EPUB, EPUB3, MOBI, DjVu, FB2, FB2.zip, DOC, DOCX, TXT, RTF, AZW, …

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50,000+ downloads

Books & Reference

Librera
50,000+ downloads
BOOKS_REFERENCE

Librera PRO - Book reader

Librera Reader PRO is an easy-to-use and highly configurable reading app that supports most popular document formats, i…

O iLiturgia é um aplicativo que possibilita rezar todas as horas canônicas da Liturgia das Horas pelo smartphone ou tablet, totalmente off-line. Em co-edição com a Edi&cce…

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50,000+ downloads

Books & Reference

Cascubo
50,000+ downloads
BOOKS_REFERENCE

O iLiturgia é um aplicativo que possibilita rezar todas as horas canônicas da Liturgia das Horas pelo smar…

Collins Bird Guide

NatureGuides Ltd

‘It’s much more convenient than taking a big book with you...the Collins app is fantastic.’ – Chris Packham, Metro ‘The Collins Bird Guide app is destined to become a r…

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50,000+ downloads

Books & Reference

NatureGuides Ltd
50,000+ downloads
BOOKS_REFERENCE

Collins Bird Guide

‘It’s much more convenient than taking a big book with you...the Collins app is fantastic.’ – C…

Ta Körkort – Click to show

Universalis Publishing

TO TRY BEFORE YOU BUY: get the "Catholic Calendar: Universalis" app for a free 30-day preview. Feasts and celebrations according to the General Calendar and the local calendars of the UK, …

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50,000+ downloads

Books & Reference

Universalis Publishing
50,000+ downloads
BOOKS_REFERENCE

TO TRY BEFORE YOU BUY: get the "Catholic Calendar: Universalis" app for a free 30-day preview. Feasts and ce…

TheFreeDictionary.com – Farlex

Dictionary Pro is the premium version of The Free Dictionary app, featuring offline dictionary and thesaurus content with NO ads. Here's what you get: * 100% ad-free dictionary content. * A huge Eng…

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50,000+ downloads

Books & Reference

TheFreeDictionary.com – Farlex
50,000+ downloads
BOOKS_REFERENCE

Dictionary Pro is the premium version of The Free Dictionary app, featuring offline dictionary and thesaurus content wi…

dict.cc+ dictionary

Paul Hemetsberger

Dictionary for 51 language combinations, usable with or without an internet connection (offline dictionary). Vocabularies can be downloaded and updated within the app for free. Before you buy, pleas…

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50,000+ downloads

Books & Reference

Paul Hemetsberger
50,000+ downloads
BOOKS_REFERENCE

dict.cc+ dictionary

Dictionary for 51 language combinations, usable with or without an internet connection (offline dictionary). Vocabulari…