Stop repeating the same SAT mistakes.
1600 Lab finds the exact skills you miss, then writes you a hard practice set every day aimed at them, with a full explanation every time you get one wrong.
Diagnostic + 3 study sessions free, no card needed. Plans from $15/month, cancel anytime.
Practice built around your own misses
Take the diagnostic
46 questions across all 8 SAT domains, timed like the real test. You get a starting score estimate and your weakest areas, ranked.
Get a new test every day
12 original questions at the level of the hardest second-module questions, aimed at your weakest domains and the skills on your fix-list.
Clear your fix-list
Every skill you miss gets a short lesson and a targeted drill. When you stop missing it, it comes off the list.
Know why the wrong answer looked right
Most prep apps tell you the right answer. 1600 Lab also tells you why the answer you picked was tempting, so the trap doesn't get you twice.
You chose: has
What you get
Test-day plan
A day-by-day schedule to your test date: daily sets, weekly full-length practice tests, review days and rest.
Score tracking
A section score estimate after every test and accuracy by domain, so you can see what's improving.
Lessons and courses
Short lessons with worked examples for every skill, plus courses on the topics that show up most.
Graphing calculator
A built-in graphing calculator with sliders, intersections and key points, so you practice the way you'll test.
Test-like screen
Timer, mark-for-review and question navigator laid out like the real digital test.
Works on any device
Phone, tablet or laptop. Your progress is saved to your account, and nobody else can see it.
Pick the plan that fits your prep.
Every plan starts free: the diagnostic + 3 study sessions, no card needed. Cancel anytime.
Basic
Everything you need to practice every day.
- 30 practice questions for every SAT skill (810 total)
- Fix-list, lessons, courses and drills
- Full explanations for every wrong answer
- Test-day plan and score tracking
- Desmos graphing calculator
Pro
Measure your score as you study.
- Everything in Basic
- 10 diagnostic tests to track your score
Premium
Flashcards plus the whole test, start to finish.
- Everything in Pro
- Flashcards for every skill (351 cards)
- Full-length timed practice tests
- Detailed score reports: domains, skills, difficulty and what to study next
Questions
Are these real SAT questions?
No. Every question is original, written in the style and difficulty of the Digital SAT. Use the official full-length practice tests too; 1600 Lab schedules them into your plan and tracks your scores.
What's free?
Make an account, take the full diagnostic, and do 3 study sessions (drills or daily tests) with no card. After that, pick a plan: Basic $15, Pro $25 or Premium $30 a month. Cancel anytime from your account menu.
How do I cancel?
Open the account menu in the app and choose Manage billing. You keep access until the end of the month you've paid for.
Is there an age requirement?
You need to be at least 13. If you're under 18, a parent or guardian should agree to the subscription and the terms.
Does it guarantee a score?
No product can. 1600 Lab makes your practice more targeted; your score still depends on the work you put in.