Essential Reference Apps

Wikipedia

The Free Encyclopedia

Dictionary.com: English Words

Dictionary, Thesaurus, Vocab

LookUp: English Dictionary

Build vocabulary, a word daily

Ancestry: Family History & DNA

Genealogy, Ethnicity & Stories

Merriam-Webster Dictionary

Reference

WolframAlpha Classic

Reference

Oxford Dictionary & Thesaurus

Ultimate English Vocabulary

iTranslate Converse

Real-time voice translator

wikiHow

Reference

The Elements in Action

by Theodore Gray

Night Sky

Guide to Stars,Comets,Meteors

Sky Guide

Star gazing astronomy tracker