Linus vs Dolphin
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
Dolphin
Build a consistent study habit for SAT and ACT exams with daily practice questions and detailed explanations. Track your progress and focus on areas needing improvement, with optional features to block distracting apps.
- Daily practice questions
- Worked explanations
- Vocabulary review
- Focus Mode for distraction blocking
- Progress and streak tracking
- Widgets for quick access
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Build a steady SAT and ACT study habit with Dolphin. Practice in a swipeable feed, work through explanations, and return to the questions and skills that need more attention. PRACTICE A LITTLE EVERY DAY Answer Math, Reading, English, and Science questions, review vocabulary, and set a daily learning goal. UNDERSTAND YOUR ANSWERS Use worked explanations, video solutions where available, and Pip the Tutor to explore a problem. Save questions and revisit mistakes as you study. MAKE ROOM TO FOCUS With your permission, Focus Mode uses Apple's Screen Time controls to block apps you choose on your selected schedule. Complete your lesson goal to unlock them, or take a break when you need one. KEEP YOUR MOMENTUM Track your streak and progress, and add Dolphin widgets to keep your learning goal close by. Dolphin offers optional in-app subscriptions. Features and content availability may vary. SAT is a trademark of the College Board, and ACT is a trademark of ACT, Inc. Dolphin is not affiliated with or endorsed by either organization.
Screenshots
Verdict
The clearest difference is in-app purchases: Dolphin at none against Linus's 10. Dolphin also leads on ads (none vs shown) and review sentiment (83% vs 68%). On price, rating, ratings volume and update cadence 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
Both are free to download. Linus sells 10 in-app purchases, starting at $24.99 per 3 months. Dolphin asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.8 for Linus against 4.8 for Dolphin. Both are backed by a comparable volume of ratings — 797 and 1.3K respectively. Written reviews are what separate them: 68% of Linus's written reviews are positive against 83% of Dolphin's.
Linus ships an update every 11 days, Dolphin every 2 weeks. Both last shipped on October 30, 2026.
| Parameter | Linus | Dolphin |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (797 ratings) | 4.8 (1.3K ratings) — better |
| Positive reviews | 68.4% of reviews | 82.8% of reviews — better |
| Number of ratings | 797 | 1.3K — better |
| Update frequency | Every 11 days — better | Every 2 weeks |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 16.0 |
| Further details — not scored | ||
| Size | 93 MB | 223 MB |
| Age rating | 4+ | 4+ |
| Developer | Linus Labs, Inc. | PaloAI Inc. |
Customer experience
Linus
Dolphin
Bugs and requests
Linus
Requested features
2 requests- Personalized practice
- Practice tests
Dolphin
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Linus
- Premium Quarterly3 Days trial$24.993 Months
- Turbo$24.991 Month
- Turbo3 Days trial$24.991 Month
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- 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
Dolphin
No in-app purchases






