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Popular Paid Books & Reference apps among people in their thirties

Knot Guide
Winkpass Creations, Inc.
Need to tie a knot? Knot Guide will teach you the ropes! Knot Guide NOW includes over 90+ knots from 14 categories. Find knots for: climbing,sailing,fishing,outdoors,camping,DIY! "Knot Guide is like a patient teacher... showing you over a
$1.99
84
10,000+ downloads
|
BOOKS_REFERENCE
PopOut! Tale of Peter Rabbit
Loud Crow Interactive Inc.
★ Kirkus Top Book App of 2010 ★ ★ iPad Hall of Fame ★ ★ Parents' Choice Gold Award ★ ★ Children's Technology Review Editor's Choice ★ ★ iTunes Rewind Top Interactive Storytelling App ★ ★ CTR Best Apps for Kids 2010 ★ ★ Featured in the NY T
$3.65
92
1,000+ downloads
|
BOOKS_REFERENCE
FactBook Ad-Free
Urbian
This is the ad-free version of the popular FactBook reference app, offering fast + easy access to the CIA World Fact Book and United Nations data and statistics. Info on many topics (incl. geography, population, economy etc.), presented cle
$2.99
85
5,000+ downloads
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BOOKS_REFERENCE
BookDroid
Absent Oy
- Supports all audio files that Android platform supports - Contains personal audio book library, where You can add/remove/modify audio books - No matter if your audio book is in a single file or multiple files, you can combine them into on
$5.52
48
100+ downloads
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BOOKS_REFERENCE
English German Dictionary
movin'App
Offline English-German Dictionary Englisch-Deutsch Wörterbuch offline * More than 168.000 words and expressions * Bookmark your favorite translations for fast reference * Works offline! No Internet connection needed, perfect for your trips
$2.74
70
100+ downloads
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BOOKS_REFERENCE
Oxford Dictionary of English
Mobile Systems
*** 50% Off - limited time offer *** The leading single-volume English dictionary, the Oxford Dictionary of English is the foremost authority on current English usage. * Offers the most comprehensive coverage of English from around the
$9.99
85
1,000+ downloads
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BOOKS_REFERENCE
Universal Book Reader Full Key
Mobile Systems
HOLIDAY SEASON DEAL 6.99$ > 4.99$ This key unlocks UB Reader and removes all advertisements. Please Note: You must have UB Reader FREE version installed and the Full Version Key in order to unlock all your Full Version Key features! Un
$4.99
85
10,000+ downloads
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BOOKS_REFERENCE
Zenith Mobile Telescope
Wikitude GmbH
Zenith is a telescope for your Android phone. Explore the night sky by pointing your mobile phone towards sky. Watch hundreds of stars, their constellations, and our solar system's planets. View great images of galaxies and nebulae from the
$4.12
81
5,000+ downloads
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BOOKS_REFERENCE
How to Tie a Tie Pro
ArtelPlus
Number 1 in the number of tie knots - now has 27 knots! 10'000'000 know and use it! • CLEAR and EASY – just follow simple instructions and pictures, and you'll be able to tie a pretty tie knot on your own! • HELPFUL and HANDY – now you won
$2.99
92
10,000+ downloads
|
BOOKS_REFERENCE
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