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Popular Paid Books & Reference apps among people in their thirties

Audubon Butterflies
Green Mountain Digital
The perfect field guide for the season! Nothing beats Audubon mobile field guides! With 1 million downloads, they are the most trusted authoritative field guide collection in North America. Highest quality at an affordable price. We are p
$3.99
73
5,000+ downloads
|
BOOKS_REFERENCE
SPB French Cards
SPB Software
Traditional flash cards for learning French language enhanced with smartphone technologies like photos, native speakers' dubbing, learning progress visualization, smart adaptive algorithm, and detailed statistics. The program helps you to s
$4.95
86
100+ downloads
|
BOOKS_REFERENCE
Chord! (Guitar Chord Finder)
RabugenTom
Chord! is at the same time the simplest and the most complete chords and scales app for guitar or any fretted instrument like bass, ukulele, banjo, etc. Unlike other chord charts app, Chord! doesn't rely on a database of charts. Instead, i
$4.12
95
10,000+ downloads
|
BOOKS_REFERENCE
Multi Lang Dictionary Pro Key
Dynotes
PLEASE READ BEFORE BUYING: ** Not an app, can't be opened, no interface, need both the Key and MLD installed ** Galaxy Tab users need to claim promo code with Market receipt ** Don't need promo code, launch MLD to unlock features Multi La
$2.74
78
1,000+ downloads
|
BOOKS_REFERENCE
CCW – Concealed Carry 50 State
Workman Consulting
This application is about empowering the CCW (concealed or open carry permit) holder (or anyone who wishes to lawfully transport a firearm in any state.) It gives you the direct information that you need to follow the maze of arcane, compli
$1.99
94
10,000+ downloads
|
BOOKS_REFERENCE
Math by WAGmob
WAGmob (Simple 'n Easy)
* * * * * WAGmob: An eBook and app platform for learning, teaching and training !!! * * * * * WAGmob brings you SimpleNeasy, on-the-go learning app for "Math". The app provides: 1. Snack sized chapters for easy learning. 2. Bite sized f
$1.99
85
10,000+ downloads
|
BOOKS_REFERENCE
Audubon Trees
Green Mountain Digital
The perfect field guide for the season! Nothing beats Audubon mobile field guides! With 1 million downloads, they are the most trusted authoritative field guide collection in North America. Highest quality at an affordable price. We are p
$3.99
58
5,000+ downloads
|
BOOKS_REFERENCE
ESV Strong's: Bible Study App
Harper Collins Christian Publishing
This version of the Olive Tree Bible Study App comes bundled with the ESV with Strong's and has been designed for deeper Bible study. Join over 4 million users on “The Bible Study App” and Learn from great scholars through thousands of reso
$14.99
90
5,000+ downloads
|
BOOKS_REFERENCE
Divine Office
Divine Office, Catholic Ministry
The Best Catholic iPhone and iPad App is finally available for your Android Phone! [About.com Reader's Choice Awards 2011/2012/2013 winner]. This app is an opportunity for you to participate in the recitation of the Liturgy of the Hours: th
$14.99
88
10,000+ downloads
|
BOOKS_REFERENCE
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