# Dolphin vs ETT Prep

The clearest difference is review sentiment: Dolphin at 83% against ETT Prep's 0%. Dolphin also leads on rating (4.8 vs 3.0) and in-app purchases (none vs 9). ETT Prep's advantage is update cadence (weekly vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ETT Prep sells 9 one-off in-app purchases. Dolphin asks for nothing beyond the download.

Dolphin holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: Dolphin has 1.3K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 83% of Dolphin's written reviews are positive against 0% of ETT Prep's.

Dolphin ships an update every 2 weeks, ETT Prep weekly. The most recent releases landed on October 30, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Dolphin | ETT Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (1.3K ratings)](https://appshunter.io/ios/app/dolphin-sat-prep/id6748280981/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/ett-prep/id6757318362/reviews) |
| Number of ratings | **1.3K** | 1 |
| Positive reviews | **82.8% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 223 MB | 46 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [PaloAI Inc.](https://appshunter.io/developer/1824977301) | [A One Institute](https://appshunter.io/developer/1524365853) |

## What reviewers say

### Dolphin

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

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

**In-app purchases:** none


### ETT Prep

[App page](https://appshunter.io/ios/app/ett-prep/id6757318362)

Prepare for the Digital SAT with full-length practice tests, thousands of targeted questions, and video lectures. Track your progress with smart analytics and personalized recommendations to improve your score.

**Highlights:** Full-length Digital SAT practice tests, Thousands of practice questions with explanations, Video lessons organized by topic, AI-powered explanations, Progress tracking & analytics, Dark mode support

**Features:** macOS Compatibility

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Premier from Core | $58.00 | one-time |
| Upgrade to Core from Prep Rookie | $86.00 | one-time |
| Core Renewal - 12 Months | $91.00 | one-time |
| Upgrade to Premier from Score Soare | $95.00 | one-time |
| Prep Rookie | $96.00 | one-time |
| Premier Renewal - 12 Months | $119.99 | one-time |
| Upgrade to Premier from Prep Rookie | $143.99 | one-time |
| Core - 12 Month Access | $181.99 | one-time |
| Premier - 12 Month Access | $239.99 | one-time |


## Frequently asked questions

### Is Dolphin free?

Dolphin is free to download, with no in-app purchases.

### Is ETT Prep free?

ETT Prep is free to download, with in-app purchases available.

### Which has better reviews, Dolphin or ETT Prep?

Dolphin is rated higher. Dolphin averages 4.8 out of 5 from 1.3K ratings, while ETT Prep averages 3.0 from 1 ratings.

### Do Dolphin or ETT Prep have ads?

Neither Dolphin nor ETT Prep shows ads.

### Which is updated more often, Dolphin or ETT Prep?

Dolphin ships an update every 2 weeks, and ETT Prep weekly. Most recently, Dolphin was updated on October 30, 2026 and ETT Prep on October 15, 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.*