Master spelling and vocabulary — one word at a time
11,200+ words across 6 grade levels. Offline AI voices. No subscriptions.
Download on the App Store
11,200+ words across 6 grade levels. Offline AI voices. No subscriptions.
Download on the App Store 
Hints mode reveals letters as you type — correct ones turn green, wrong ones red. Bee mode gives you a sentence for context. Guess mode is pure recall — just you and the word.
Real-time voice reads each word aloud. Adjust speed, switch voices mid-session, and track your progress card by card.
3D flashcards show the word on front, definition and example sentence on back. Two confidence sliders — one for spelling, one for definition — track what you know and what needs work.
When both hit max, the card auto-advances. Your confidence data feeds into spaced repetition so you focus on what matters.
Point your camera at any printed word list — a worksheet, textbook page, or study guide. SpellFlex extracts the words and matches them against 11,200+ entries in the database.
Build custom lists instantly. Share them with classmates via AirDrop or Messages.
ML-powered voices that work without internet. Tap "Alt Voice" to hear another instantly.
Smart intervals from 5 minutes to 10 days. Words you struggle with come back sooner.
Gold, Silver, and Bronze based on accuracy. Fireworks animations celebrate your wins.
Elementary through Graduate, plus SAT prep and ESL lists. Every word has a definition and example sentence.
Build your own from the full database, scan from paper, or import shared lists with one tap.
No internet required. No subscriptions. No ads. Everything runs on your device.