# Dolphin vs PrepGo

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 monetization model there is nothing between them.

Both are free to download. PrepGo sells 10 in-app purchases, starting at $19.99 per month. Dolphin asks for nothing beyond the download.

Dolphin holds the better App Store score, 4.8 against 4.3. Both are backed by a comparable volume of ratings — 1.3K and 311 respectively. Written reviews point the same way: 84% of Dolphin's written reviews are positive against 23% of PrepGo's.

Dolphin ships an update every 2 weeks, PrepGo every 9 days. The most recent releases landed on October 21, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Dolphin | PrepGo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (1.3K ratings)](https://appshunter.io/ios/app/dolphin-sat-prep/id6748280981/reviews)** | [4.3 (311 ratings)](https://appshunter.io/ios/app/prepgo-ap-exam-prep/id6753966286/reviews) |
| Number of ratings | **1.3K** | 311 |
| Positive reviews | **83.5% of reviews** | 22.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 9 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 229 MB | 84 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [PaloAI Inc.](https://appshunter.io/developer/1824977301) | [StudyX Inc.](https://appshunter.io/developer/1571844481) |

## What reviewers say

### Dolphin

[App page](https://appshunter.io/ios/app/dolphin-sat-prep/id6748280981)

Master the Digital SAT with a unique, social media-inspired interface. Swipe through thousands of official practice questions with instant, short video explanations. The app intelligently adapts to your learning, focusing on your weak areas for efficient score improvement.

**Highlights:** 10,000+ Official Digital SAT Questions, Short Video Solutions for Every Problem, Personalized Learning Algorithm, Spaced Repetition for Retention, Frictionless Study Design, Score Tracking

**In-app purchases:** none


### PrepGo

[App page](https://appshunter.io/ios/app/prepgo-ap-exam-prep/id6753966286)

Master AP exams with a gamified learning experience. Study guides, flashcards, and quizzes are presented in a fun, visual format to help you track progress and identify weak spots. Conquer your exams with expert-verified content and engaging practice questions.

**Highlights:** Expert-verified study guides, Gamified visual learning map, Daily streaks and energy system, Smart flashcards, AP-style quizzes, Progress tracking dashboard, Covers 30+ AP subjects

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PrepGo Plus Monthly | $19.99 | per month |
| PrepGo Plus Monthly | $29.99 | per month |
| PrepGo Plus Monthly | $29.99 | per month |
| PrepGo Plus Monthly | $49.99 | per month |
| PrepGo Plus Monthly | $49.99 | per month |
| PrepGo Plus Monthly | $49.99 | per month |
| PrepGo Plus 6-Month | $89.99 | per 6 months |
| PrepGo Plus Annual | $239.99 | per year |
| PrepGo Plus Annual | $239.99 | per year |
| PrepGo Plus Annual | $239.99 | per year |


## Frequently asked 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 1.3K ratings, while PrepGo averages 4.3 from 311 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 October 21, 2026 and PrepGo on October 20, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*