Sentence building, daily lessons, and smart review
Build Spanish fluency one sentence at a time
Most apps teach you to recognize Spanish. Sentence Lab teaches you to produce it — translate real sentences, hear them in natural Spanish voices, and lock them in with smart review.
Practice that fits your level and mood
5 exercise types — full translation, multiple choice, fill-in-the-blank, word select, and listening
Every level, A0 to C1 — start where you are and grow from there
Pick a topic or let it choose — smart sessions target your weak spots
Hear every answer in 4 natural voices at a speed you control
Your learning, organized
Daily streaks & goals keep you consistent and motivated
Guided lesson plans so you always know what to study next
Spaced repetition reviews that bring back sentences right before you forget them
Track your weak areas and focus practice where it matters most
How the Core Practice Works
See the English
Each exercise shows you an English sentence to translate.
Type in Spanish
Write the Spanish translation. Make use of personalized hints if you get stuck.
Learn & Review
Get instant feedback and review sentences using spaced repetition.
A Comprehensive Approach to Mastering Spanish
More than just sentence practice — Sentence Lab gives you a complete toolkit for building real fluency.
Track Your Progress
Streaks, accuracy, level progress, topic mastery — see exactly how far you've come.
Read Real Spanish
Stories at every level with side-by-side translations. Tap to reveal the English.
Structured Lessons
Grammar topics organized by CEFR level, from verb conjugations to the subjunctive.
AI Conversation PartnerPREMIUM
Have a real, free-flowing Spanish conversation with a warm AI partner that stays at your level, gently corrects you as you go, and nudges you to say more — like a tutor with infinite patience, any time you want to practice.
Guided ScenariosPREMIUM
Premium: Rehearse real-life conversations — ordering food, meeting someone, seeing a doctor — building each reply from a word bank and hearing every line in natural voices.
Custom Content
Add your own sentences and vocabulary to practice. Import via CSV for bulk uploads. Perfect for supplementing with your own study material.
Personalized Hints
Get smart hints tailored to your learning. The app remembers your past mistakes and offers targeted guidance to help you improve.
Assessment Tests
Take a placement test to find your starting level, then track your improvement with monthly progress checks. See exactly how far you've come.
4 Natural Spanish Voices
Hear every sentence and story in studio-quality AI voices. Choose your accent and voice — Latin American or Castilian, male or female — and adjust the speed to match your level.
Smart PracticePREMIUM
Premium: Get unlimited custom exercises tailored to your level and topics. Receive personalized feedback on every answer.
Current News in SpanishPREMIUM
Premium: Read real news from around the world, adapted to Spanish at your level. Listen with natural voice narration. Fresh articles daily.
Learning that doesn't feel like studying
Step away from the drills to explore the Spanish-speaking world — or keep your streak alive with a quick game.
Explore the Spanish-Speaking World
Tour all 21 Spanish-speaking countries on an interactive map — food, music, history, holidays, slang, and the dialects that make each one unique. Completely free, no account needed.
Explore the map →Or turn practice into a game
Sneak in real reps without it feeling like work — five quick games that quietly drill your vocabulary, verbs, and geography.
Postcards
Follow a friend around the map and pin where they landed
Crosswords
Themed grids built from Spanish clues
Memory Match
Pair Spanish and English against the clock
Vocab Challenge
Race through the most common words
Verb Blitz
Sprint through verb conjugations
All games are free with any account — create one to play →
From Beginner to Advanced, CEFR levels A1 - C1+
Over 1,900 sentences across 6 levels and dozens of topics
Know some Spanish already? Take a free 5-minute placement test to skip ahead to your level.
Free Tools — No Account Required
Use these reference tools anytime, completely free. No signup needed.
Also Available as a Book
Take your Spanish learning offline with our complete workbook.
Paperback & Kindle
Sentence Lab: The Complete Spanish Workbook
200+ pages of grammar lessons, 180+ exercises, bilingual readings, and verb conjugation tables. From first words to real conversations (A1-C1).
View on Amazon →Prefer your phone? Practice on the go with the free iOS app.
Don't want another app? No problem — this site works great on mobile too.
Download on theApp StoreReady to start building your Spanish?
Free to start. No credit card required.