Comparison

Dolphin vs PrepGo

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

Head to head
About

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.

Highlights
  • Daily practice questions
  • Worked explanations
  • Vocabulary review
  • Focus Mode for distraction blocking
  • Progress and streak tracking
  • Widgets for quick access
Currently charting
Read full description

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.

About

PrepGo

This app transforms AP exam preparation into an engaging, game-like experience. It offers expert-verified study guides, interactive quizzes, and visual learning maps to help students master complex subjects and track their progress effectively.

Highlights
  • Expert-verified study guides
  • Gamified learning map with levels
  • Daily streaks and energy system
  • Smart flashcards
  • AP-style quizzes
  • Progress tracking dashboard
  • Covers 30+ AP subjects
Features
Read full description

Tired of the AP grind? Stop cramming and start playing. PrepGo is your new secret weapon to get a 5. We get it. Studying for AP® exams is stressful and boring. That's why we rebuilt the entire AP learning experience from the ground up, inspired by the Duolingo-style you already love. We make mastering complex subjects simple, motivating, and highly effective. PrepGo is built on three core principles: 1. LEARN WITH EXPERT-VERIFIED CONTENT No more confusing textbooks. Start with our in-depth Study Guides designed by AP experts. We break down every topic for subjects like AP English Literature or AP Statistics from the official College Board (CB) guidelines into clear, manageable explanations. 2. STUDY IN A FUN, GAMIFIED WAY This isn't just another boring study app. - Visual Learning Map: Your entire course is a visual path. Unlock new topics and "levels" like you would in a game. - Streaks & Energy: Build your daily study Streak to stay motivated. Use your daily Energy (25 per day) to tackle quiz questions and prove your skills. - Proven 3-Step Loop: Master everything with our scientific Learn → Review → Practice method. 3. TRACK YOUR MASTERY (So You Know You're Ready) Stop guessing if you're prepared. Our detailed Progress dashboard gives you a 360-degree view of your knowledge. - Track your accuracy by topic, whether it's for AP Calculus AB or AP Human Geography. - Watch your study time grow. - Instantly identify your weak spots, so you know exactly what to focus on. Key Features Students Love: - Smart Flashcards: Use our Review module to lock in key concepts and definitions. - AP-Style Quizzes: Test your knowledge with hundreds of Practice questions that mirror the real exam. - All 30+ AP Subjects: We've got you covered for your entire schedule. Get expert-verified prep for AP U.S. History (APUSH), AP Psychology, AP World History: Modern (APWH), AP English Language, AP Biology (AP Bio), AP Chemistry, AP Physics 1, and all other 30+ courses! - Detailed Feedback: Get instant explanations for every quiz question, so you learn from your mistakes. Don't just study for your APs—conquer them. Download PrepGo today and turn that study grind into a game you can win! --- AP® is a registered trademark of the College Board, which is not affiliated with, and does not endorse, this app. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://prepgo.com/privacy-policy

Screenshots

Dolphin4 screens
PrepGo4 screens

Verdict

The call

The clearest difference is review sentiment: Dolphin at 84% against PrepGo's 23%. Dolphin also leads on rating (4.8 vs 4.3) and in-app purchases (none vs 10). On price, update cadence, ads and device support 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. PrepGo sells 10 in-app purchases, starting at $19.99 per month. Dolphin asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Dolphin holds the better App Store score, 4.8 against 4.3. Both are backed by a comparable volume of ratings — 1.4K and 319 respectively. Written reviews point the same way: 84% of Dolphin's written reviews are positive against 23% of PrepGo's.

UpkeepUpdate frequency

Dolphin ships an update every 2 weeks, PrepGo every 9 days. The most recent releases landed on November 8, 2026 and November 9, 2026 respectively.

Scorecard6 real differences · 5 level
Dolphin versus PrepGo: the parameters behind the verdict, then further details
ParameterDolphinPrepGo
PriceFreeFree
Rating4.8 (1.4K ratings) — better4.3 (319 ratings)
Positive reviews84.1% of reviews — better22.7% of reviews
Number of ratings1.4K — better319
Update frequencyEvery 2 weeksEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
Best chart rank#210 — better—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.015.0 — better
Further details — not scored
Size220 MB84 MB
Age rating4+4+
DeveloperPaloAI Inc.StudyX Inc.

Customer experience

Dolphin

All ratings1,367 ratings
Positive96.0%
Neutral1.5%
Negative2.5%
Written reviews107 reviews
Positive84.1%
Neutral2.8%
Negative13.1%

PrepGo

All ratings319 ratings
Positive83.4%
Neutral4.1%
Negative12.5%
Written reviews22 reviews
Positive22.7%
Neutral9.1%
Negative68.2%

In-app purchases

None

Dolphin

No in-app purchases

10 purchases

PrepGo

Subscriptions10
  • PrepGo Plus Monthly3 Days trial$19.991 Month
  • PrepGo Plus Monthly1 Month trial$29.991 Month
  • PrepGo Plus Monthly7 Days trial$29.991 Month
Show 7 more
  • PrepGo Plus Monthly7 Days trial$49.991 Month
  • PrepGo Plus Monthly14 Days trial$49.991 Month
  • PrepGo Plus Monthly$49.991 Month
  • PrepGo Plus 6-Month7 Days trial$89.996 Months
  • PrepGo Plus Annual14 Days trial$239.991 Year
  • PrepGo Plus Annual$239.991 Year
  • PrepGo Plus Annual7 Days trial$239.991 Year

Questions

Is Dolphin free?
Dolphin is free to download, with no in-app purchases.
Is PrepGo free?
PrepGo is free to download, with in-app purchases available.
Which has better reviews, Dolphin or PrepGo?
Dolphin is rated higher. Dolphin averages 4.8 out of 5 from 1.4K ratings, while PrepGo averages 4.3 from 319 ratings.
Do Dolphin or PrepGo have ads?
Neither Dolphin nor PrepGo shows ads.
Which is updated more often, Dolphin or PrepGo?
Dolphin ships an update every 2 weeks, and PrepGo every 9 days. Most recently, Dolphin was updated on November 8, 2026 and PrepGo on November 9, 2026.

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