Store data
- Store status
- Coming soon
- Scheduled release
- 9 November 2026
- Positive reviews
- —
- Total reviews
- —
- Release date
- 9 November 2026
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Errant Ant is a reader for people learning a language through real books. Import your own EPUB, PDF and TXT books or download free classics, then simply read. Every page you turn and every word you look up is counted, and words are colored by how well you actually know them. No flashcards to review and no ratings to keep: the colors fade as the words become yours.
Import EPUB, text-based PDF and TXT files, or download free public-domain books from Project Gutenberg.
A clean, paged reader with your choice of font, text size, line spacing, column width and page-turn style.
Twelve learning languages: English, French, German, Spanish, Italian, Portuguese, Russian, Turkish, Korean, Japanese and Chinese (Simplified and Traditional).
Each page you turn records the words on it, and each word you click records a lookup.
Words are colored by how often you understood them without help: new and difficult words stand out, familiar ones fade away.
Mark a word Mastered and it never colors again. Give any word a color of its own and it keeps that color everywhere.
Click a word, or drag across a phrase, to see:
how well you know it, from your own reading
your own meaning or note
entries from free offline dictionaries you choose to download: Wiktionary in many languages, Open English WordNet, JMdict and CC-CEDICT
every sentence you met it in, with a jump back to that page
Vocabulary and Phrases list every word and phrase you have met, sorted by how well you know them. You can import word lists too.
Pin words and books to your start page as live tiles.
The Map: lay out words, notes, pictures and drawings on endless boards, connect related words, and share a board as a file.
No account, no sign-in, no ads.
Your books and your learning stay on your computer. The internet is used only to download the books and dictionaries you pick, and they work offline afterwards.
Interface in 12 languages, with light and dark color schemes and an adjustable interface size.
Errant Ant is complete for everyday reading and grows with its readers. Coming next: word-by-word splitting for Chinese and Japanese (today they are counted one character at a time), more dictionaries, a macOS version, and syncing between devices.
Steam currently lists 9 Nov 2026 as the release date.