Comparison

Linus vs Flash

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Linus

This app offers a gamified approach to preparing for the new Digital SAT. It provides targeted practice for Math, Vocabulary, and Reading sections, with features like daily quests and progress tracking to make studying engaging and effective.

Highlights
  • Gamified learning with quests and streaks
  • Simulates Bluebook testing experience
  • Targeted Math, Vocabulary, and Reading practice
  • Smart study planner for bite-sized lessons
  • Instant feedback on answers
  • Progress tracking
Features
Read full description

Stop studying harder. Start studying smarter for the new Digital SAT. Linus is the SAT prep app built for how the test actually works now. Adaptive practice that mirrors the real Digital SAT format, so nothing on test day surprises you. WHY STUDENTS CHOOSE LINUS: - 250+ point score improvement guarantee - Adaptive practice that matches the real Digital SAT - Math, Reading, Writing, and Vocabulary all in one app - Personalized study plan based on YOUR test date - Gamified daily practice that actually sticks - Built specifically for the new Digital SAT format START FREE, UPGRADE WHEN YOU'RE READY Try Linus free for 3 days. Practice real SAT questions, see your score improve, then decide. No commitment until you're convinced. HOW IT WORKS Set your target score, enter your test date, and Linus builds a study plan around YOUR timeline. Whether your SAT is in 2 weeks or 6 months, Linus adapts to make every study session count. WHAT MAKES LINUS DIFFERENT Most test prep apps just throw practice questions at you. Linus tracks what you're getting wrong, adapts in real time, and focuses your study time where it matters most. It's like having a private SAT tutor in your pocket. Rated 4.8 stars by students who raised their scores. Questions? Reach us at support@linusprep.com Disclaimer: SAT and BigFuture are trademarks registered and owned by the College Board, which is not affiliated with and does not endorse this product. Bluebook is a trademark of the College Board. WEBSITE: https://linusprep.com TERMS OF USE: https://linusprep.com/legal PRIVACY POLICY: https://linusprep.com/legal/privacy

About

Flash

Features
Read full description

Prep for the Digital SAT in short sessions that actually fit your week. Flash turns test prep into a path you can follow. Work through lessons one step at a time, drill real question types, and see exactly where your reasoning went wrong instead of just seeing a red X. STRUCTURED LEARNING PATH Work through hand crafted, interactive lessons that span every topic on the SAT. Streaks, XP, and levels keep short sessions from turning into skipped weeks. TALK TO A TUTOR, OUT LOUD When a question stops you, press the mic and ask. The voice tutor answers in real time, works through the problem with you, and draws each step onto a worksheet as it talks. Diagrams, graphs, and the actual algebra appear as it explains them. Ask it to slow down, skip ahead, or start over. It is a conversation, not a video you scrub through. Every session is saved, so you can go back to anything you worked through. HUNDREDS OF PRACTICE PROBLEMS, FREE Solve hundreds of math and reading practice problems, with detailed and narrated explanations completely free. Learn how to use Desmos to solve math questions in half the time! FLASH PRO Pro removes the energy limit on lessons and unlocks unlimited conversations with the voice tutor. Flash Pro is an auto-renewing subscription. Monthly ($9.99) or annual ($71.99), with a 1-week free trial for new subscribers. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period; your account is charged for renewal within 24 hours before the period ends. Manage your subscription and turn off auto-renew in your Apple Account settings after purchase. Any unused portion of a free trial is forfeited when you buy a subscription. Terms: https://www.satsquared.com/app/terms Privacy Policy: https://www.satsquared.com/app/privacy SAT is a registered trademark of the College Board, which is not affiliated with and does not endorse Flash.

Screenshots

Linus4 screens
Flash4 screens

Verdict

The call

The clearest difference is ads: Flash at none against Linus's shown. Linus's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 26.0). On price, update cadence and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Linus sells 10 in-app purchases, starting at $24.99 per 3 months and Flash sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Linus ships an update every 11 days, Flash every 2 weeks. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
Linus versus Flash: the parameters behind the verdict, then further details
ParameterLinusFlash
PriceFreeFree
Rating4.8 (798 ratings) — better—
Positive reviews68.4% of reviews—
Number of ratings798 — better—
Update frequencyEvery 11 days — betterEvery 2 weeks
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.1 — better26.0
Further details — not scored
Size93 MB26 MB
Age rating4+4+
DeveloperLinus Labs, Inc.Yusuf Shaikh

Bugs and requests

Linus

Requested features

2 requests
  • Personalized practice
  • Practice tests

Flash

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Linus

Subscriptions10
  • Premium Quarterly3 Days trial$24.993 Months
  • Turbo$24.991 Month
  • Turbo3 Days trial$24.991 Month
Show 7 more
  • Premium Yearly3 Days trial$49.991 Year
  • Turbo Monthly3 Days trial$99.001 Month
  • Turbo Monthly3 Days trial$100.001 Month
  • Turbo$149.991 Year
  • Turbo3 Days trial$149.991 Year
  • Turbo Yearly3 Days trial$499.001 Year
  • Turbo Yearly3 Days trial$600.001 Year
2 purchases

Flash

Subscriptions2
  • Pro Monthly7 Days trial$9.991 Month
  • Pro Annual7 Days trial$71.991 Year

Questions

Is Linus free?
Linus is free to download, with in-app purchases available.
Is Flash free?
Flash is free to download, with in-app purchases available.
Do Linus or Flash have ads?
Linus shows ads; Flash does not.
Which is updated more often, Linus or Flash?
Linus ships an update every 11 days, and Flash every 2 weeks. Most recently, Linus was updated on November 8, 2026 and Flash on October 31, 2026.

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