Best Reference Apps

NASA

by NASA

Free

Explore the universe with access to live and on-demand NASA+ videos, a vast collection of stunning images, and the latest mission news. Discover interactive augmented reality experiences and track the International Space Station's path.

WordReference Dictionary

by WordReference.com, LLC

Free

Access a comprehensive suite of dictionaries and translation tools for multiple languages. Explore conjugations, synonyms, and a vast forum with millions of answered questions. This app provides quick access to extensive language resources.

Guitarist's Reference

All-in-One Guitarist's Suite

$19.99

This comprehensive suite offers a vast collection of guitar chords, scales, and arpeggios with clear diagrams and detailed theory. It includes tools for finding chord-scale relationships, exploring alternate tunings, and even a virtual guitar for practice.

Police Scanner Radio & Fire

Live Breaking News & Alerts

Free

Listen to live police, fire, and emergency radio broadcasts from around the world. Receive breaking news alerts and stay informed about local events and major national incidents in real time.

Wikipedia

The Free Encyclopedia

Free

Access the world's largest free knowledge base with over 60 million articles in nearly 300 languages. Explore trending topics, save articles for offline reading, and customize your reading experience with various themes and text sizes. Contribute to the community by editing articles and participating in discussions.

World Map +

Quick Reference World Maps

Free

Access essential world maps for quick reference and navigation. Explore political, detailed, and time zone maps, with interesting facts about countries. Works online and offline, ideal for students, travelers, and curious minds.

Merlin Bird ID by Cornell Lab

Identify Birds You See & Hear

Free

Easily identify birds by sight or sound using advanced machine learning. Explore birds in your region, track your sightings, and learn about species with photos, sounds, and range maps. This free app from the Cornell Lab of Ornithology helps build your birding skills.

Word of the Day・Vocabulary

English Vocab Builder & Games

Free

Enhance your vocabulary with daily words, engaging games, and personalized quizzes. This app offers expert-curated content and interactive challenges to make learning stick and improve your communication skills.

Dictionary.com: English Words

Dictionary, Thesaurus, Vocab

Free

Access over 2 million trusted definitions and synonyms for English words. Enhance your vocabulary with daily new words, example sentences, and audio pronunciations. This app provides grammar tips and editorial content to deepen your understanding of the English language.

EMDEX Reference

Nigeria’s Drug Reference Plus

Free

This app provides comprehensive drug and therapeutic information for Nigeria, including essential medicines, treatment guidelines, and drug product details. It features an interaction checker, diagnosis and management of prevalent diseases, and a natural health products compendium. Designed for healthcare professionals, it offers enhanced search and detailed drug information.

Lineman's Reference - URD

Padmounts Cables and Switching

$9.99

This app provides comprehensive training for linemen and apprentices on underground distribution systems. It covers essential skills like cable isolation, transformer replacement, and troubleshooting. Interactive labs and quizzes reinforce learning for various skill levels.

Excel Function Reference

Step by Step Formula Examples

Free

This app provides a comprehensive guide to Excel functions with step-by-step examples. It features smart search, name search, and concise descriptions for over 400 formulas. Users can easily share formula details and access essential functions for free.

Indigo - Medical Reference

Knowledge at Your Fingertips

Free

A comprehensive medical reference for internal medicine, covering conditions from anemia to HIV/AIDS. It offers guidance for managing common ward and ICU cases, plus essential tips for new residents on consults and H&Ps. Designed for educational purposes for medical students and residents.

CRSI Rebar Reference

Ready reference data for rebar

Free

Access essential data for reinforcing bars (rebar) including specifications, hook details, and marking requirements. This app serves as a quick reference for industry standards and links to online resources.

Audubon Bird Guide

Identify over 800 bird species

Free

Identify North American birds with this comprehensive field guide. Features include a bird ID tool based on observations, detailed species information with photos and audio, and a personal sightings log. Discover nearby birding locations and connect with conservation efforts.