Flash Words shows one word at a time so a reader can practice recognizing it quickly; tapping the screen reads the word aloud and reveals the next one.

Dictionary sources

• Dolch lists (Pre-K, Kindergarten, 1st–3rd Grade, Nouns, and combined lists) — Edward Dolch's 1936 sight word list, as commonly published by SightWords.com.
• UFLI Heart Words (and the 4-letters-or-less variant) — the University of Florida Literacy Institute's list of permanently irregular high-frequency words.