Historical Encyclopedia

Historical Encyclopedia is a free offline dictionary with more than 21,000 entries. The entire database is stored on your device, so it works with no internet connection, no registration and no hidden limits.

Search a word, hear it, keep it and turn it into something you remember.

AI HELPER
• Ask AI about any word: definition & context, synonyms, pronunciation guide, example sentences
• Word not in the dictionary? Find it with AI and add it to your own database
• AI can write the description for the words you add yourself
• Keep any AI answer as the word description or save it as a note

THE DICTIONARY, FULLY OFFLINE
• 21,000 entries, 100% offline
• Instant results as you type
• Search filters: starts with, ends with
• Search the text you copied to the clipboard
• Random word button
• Add your own words and edit existing entries

LEARNING TOOLS
• Flashcards — the classic way to memorise new vocabulary
• Quiz — multiple choice test on your own words
• Listening — hear the word and choose the right answer
• Word game — guess the hidden word in 4 to 7 letters, with statistics and win streaks
• Build your own training sets: pick the source, the number of words, the order and the difficulty
• Start a training session straight from your favourites, bookmarks or history
• See what you got right and repeat only the words you missed

KEEP YOUR WORDS IN ORDER
• Favourites — save a word with one tap
• Bookmarks — colour-coded folders for your own topics
• Notes — attach your own note to any word
• History — every word you looked up, sorted by date, name or view count
• Multi-select mode: export, listen to, bookmark or delete many words at once
• Export your word lists to a text file and share them

LISTEN AND PRONOUNCE
• Listen to the word and to its full description
• Clear pronunciation for every entry
• The built-in player reads whole word lists at 0.5x, 1x or 2x speed
• Playback continues with the screen off

WIDGETS
• Word of the day widget
• Word list widget
• Training widget — learn without even opening the app

WORD REMINDERS
• Receive a word as a notification during the day
• Choose the time, the weekdays and the source: random, favourites, bookmarks or history

SET IT UP YOUR WAY
• Dark mode and automatic night mode
• Adjustable text size and interface colour
• Show, hide and reorder the tabs — keep only what you use
• Interface available in English, Русский, Español, Italiano, Deutsch, Français, Türkçe, Azərbaycan, Українська
• Select text in any other app to search it here or add it to your dictionary
• Full tablet and landscape support

One app, several jobs: Historical Encyclopedia, an offline reference with no connection required, a vocabulary trainer and a learning companion.

This is an offline dictionary — the database is kept on your device, so it needs some storage space.

Suggestions, comments and legal questions: ttdicpro@gmail.com

Recent changes:
• Bugs fixed.