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Popular Paid Books & Reference apps among people in their thirties

SPB Spanish Cards
SPB Software
Traditional flash cards for learning Spanish language enhanced with smartphone technologies like photos, native speakers' dubbing, learning progress visualization, smart adaptive algorithm, and detailed statistics. The program helps you to
$4.95
80
500+ downloads
|
BOOKS_REFERENCE
Guitarist's Reference
My App Catalog LLC
ALL-IN-ONE Package: Guitar Chords, Scales, Triads, Arpeggios, Notes On The Fretboard, Reverse Chord Finder Tool, Chord Quiz, Alternate Guitar Tunings and Chord Scale Relationships. + Guitar Chord Encyclopedia: This handy app includes over
$4.99
85
10,000+ downloads
|
BOOKS_REFERENCE
English->Chinese Dictionary
QTranslator
* QTranslator cannot be supported after G Pro 2. * You cannot use and purchase TTS(Text-to-speech). ----------- 1. This dictionary app is only supported on LG mobile devices with QTranslator or Dictionary v3.0 installed. It cannot be run s
$4.31
73
100+ downloads
|
BOOKS_REFERENCE
Dr. Seuss's Sleep Book
Oceanhouse Media, Inc.
Say goodnight with Dr. Seuss in this interactive book app as one yawn spreads from bedroom to bedroom until ninety-nine zillion, nine trillion and three Seussian creatures are sound asleep! Explore pictures, learn new vocabulary, and follow
$4.99
90
10,000+ downloads
|
BOOKS_REFERENCE
Aldiko Sync Pro Unlocker
The Droidware Foundry
Important: PLEASE READ THIS ENTIRE DESCRIPTION BEFORE PURCHASING! UNLOCK KEY (License) for the Aldiko Sync application to enable extra features. This app unlocks the "Pro" features of the Aldiko Sync application. You must have the latest
$0.99
85
5,000+ downloads
|
BOOKS_REFERENCE
Audubon Mammals
Green Mountain Digital
This introduction to 510 of the most common species of insects and spiders found in North America features in-depth information on each species, including habitat, range, size, and more, along with high-quality, professional photographs. Au
$3.99
65
5,000+ downloads
|
BOOKS_REFERENCE
Merriam-Webster's Collegiate
Paragon Software GmbH
Merriam-Webster's Collegiate® Dictionary, Eleventh Edition is the perfect portable resource for teachers, students, writers, and word lovers everywhere. ------------ Dictionary Details: • Fully revised print edition featuring more than 16
$20.79
89
1,000+ downloads
|
BOOKS_REFERENCE
Moon Phase Pro
Udell Enterprises, Inc
<b>All-new HD imagery!</b> 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 from your location - the moon tracks
$0.99
94
100,000+ downloads
|
BOOKS_REFERENCE
Knots 3D
Nynix LLC
Tie, untie and rotate more than 100 knots with just your finger! Knots 3D will give you a whole new perspective on knots! Grab some rope and have fun! - #1 Knot Reference in 75 Countries* - Included in Scouting Magazine's "Ultimate List
$0.99
93
50,000+ downloads
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BOOKS_REFERENCE
US Marine Corps Close Combat
milodroid
Put the entire U.S. Marine Corps Close Combat Training Manual on your phone. Can move to the sd card for android 2.2 and up. Based on the U.S.Marine Corps Close Combat Training Manual MCRP 3-02B Table Of Contents Overview of Close Combat
$1.99
90
10,000+ downloads
|
BOOKS_REFERENCE
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