1600.io review

1600.io takes a different approach from the big course companies: instead of writing its own practice questions, it explains official SAT questions. The Premium Membership includes 6,000 explanatory videos covering more than 40 digital and pre-digital SATs, interactive Desmos solutions for digital SAT math, the SAT Math Orange Book with over 1,200 problems, and a Mastering Desmos course for the on-screen graphing calculator. Plans cost $6.99 per week, $19.99 per month or $99.99 per year, and all can be canceled from the account page. The site says its prep is 100% AI-free. There is no adaptive plan, no parent reports and no points guarantee, and the content leans toward math. For a student already taking Bluebook tests who wants to understand every missed math question, it is the cheapest paid add-on here.

Who it is for

students targeting top math scores who already use official practice tests

Price

Premium Membership $6.99 per week, $19.99 per month or $99.99 per year.

$19.99/month Monthly Premium Membership
Quoted from the vendor pricing page on November 12, 2026.

Key features

• 6,000 explanatory videos for more than 40 digital and pre-digital SATs
• Interactive Desmos solutions for digital SAT math problems
• SAT Math Orange Book with over 1,200 example and practice problems
• Mastering Desmos for the Digital SAT course
• Weekly, monthly or annual plans you can cancel anytime

Strengths and weaknesses

• Strength: $99.99 per year works out under $9 per month
• Strength: Explains official test questions rather than imitations
• Strength: Free preview of resources
• Weakness: Strongest on math; less depth on Reading and Writing
• Weakness: No adaptive study plan or progress reports
• Weakness: No points guarantee

Key facts

• Starting price: $19.99 per month
• Other plans: $6.99 per week; $99.99 per year
• Videos: 6,000 explanations
• Math book: 1,200+ problems
• AI use: Says its prep is 100% AI-free

Where it ranks

1600.io is No. 7 in our Best SAT Prep Courses verdict.