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Free. No account. No internet required. Just download and start.
Coming soon to app stores
Android 8+
iOS 13+
8 study modes. Spaced repetition that adapts to you. OCR scanning. Translation suggestions. Full offline support. No account needed. Just you and the words.
No bloat, no subscriptions, no cloud dependency. FlexLex is built for learners who want results.
FlexLex tracks every answer and schedules reviews right before you'd forget. Words you struggle with appear more often. Words you know fade into long-term memory.
Point your camera at a textbook, worksheet, or whiteboard. Scan word–translation pairs or individual words — FlexLex reads them and imports them into your set instantly.
Everything lives on your device. No account, no internet, no data collection. Your words are yours alone.
Folders, sets, nested structures. Organize by language, by topic, by difficulty. However your brain works.
Learning German? Assign colors to der, die, das and see them highlighted everywhere in the app. Works with any language's grammar markers.
Load words from Excel files, text files, or scan them with your camera. Building your vocabulary library takes seconds.
Daily stats, accuracy charts, word status breakdowns. See exactly where you stand and what needs work.
Type a word and get instant translation suggestions. Powered by built-in dictionaries for dozens of languages.
Add words manually, scan them with your camera, or load an Excel file. Build your vocabulary library in seconds.
Flashcards for quick review. Write mode for active recall. Match game for fun. Pick what fits your mood and your time.
Every answer is tracked. Words are categorized as Know, Don't Know, or Hard. The SRS algorithm adjusts your schedule in real time.
Daily streaks, accuracy rates, mastery levels. See words move from "Don't Know" to "Know" as your vocabulary grows.
Different modes activate different parts of your memory. Mix them for maximum retention.
A guided session that teaches you new words step by step. The SRS algorithm picks what you need to learn next and schedules reviews at the perfect time — so you never waste a study minute.
Swipe through cards, mark what you know. Flip to reveal.
Type the translation from memory — pure active recall.
Hear the pronunciation, spell it letter by letter.
Pick from 4 to 8 options. Quick, reinforcing rounds.
Mixed question types, timed. Closest thing to a real exam.
Pair words with translations against the clock.
How many can you get right before time runs out?
Most vocabulary apps want your data, your money every month, and your internet connection. FlexLex doesn't.
No account. No cloud. No tracking. Your words, your streaks, your progress — all live entirely on your phone. We literally cannot see them, because there's nothing to see.
Most apps give you flashcards and call it done. FlexLex gives you eight distinct modes — each one activates a different part of your memory, so you never hit a plateau.
Spaced repetition isn't a gimmick — it's decades of cognitive science. FlexLex uses the SM-2 algorithm to schedule reviews right before you'd forget. Words you struggle with appear more often. Words you've mastered fade into the background.
Choose the plan that works for you. All Pro features included.
Try FlexLex and see how it works. Perfect for your first test.
Full access to everything. Cancel anytime.
Everything you need to know about FlexLex.
Yes. The free version includes flashcards, spaced repetition, up to 2 sets with 30 words each, and full offline support. No account required, no ads. Pro unlocks all 8 study modes, unlimited sets and words, import tools, translation suggestions, spell check, and much more — for $15/year.
100%. FlexLex stores everything locally on your device. No cloud sync, no server dependency. Your data stays on your phone, always available, even on a plane or in a remote area.
FlexLex is language-agnostic. You create your own word pairs, so it works with any language combination — English-Japanese, Spanish-French, or even technical terminology. The built-in dictionary suggestions cover dozens of popular languages.
Every time you review a word, FlexLex records whether you knew it, found it hard, or didn't know it. Based on your answers, it calculates the optimal time to show that word again — right before you'd forget it. Words you struggle with appear more frequently; words you know well are spaced further apart.
Yes. FlexLex supports importing from Excel (.xlsx) files and plain text files. You can also use the OCR camera scanner (Pro) to photograph printed word lists, textbook pages, or whiteboards and convert them to flashcards instantly.
FlexLex Pro is $15/year. It unlocks every feature, including all future updates, and can be cancelled anytime. If your subscription lapses, you get a 7-day grace period before Pro features lock.
Help us make FlexLex better. Share your suggestions, feature requests, or anything on your mind.
Free. No account. No internet required. Just download and start.
Coming soon to app stores