# OnePrep vs ETT Prep

The clearest difference is rating: OnePrep at 4.7 against ETT Prep's 3.0. OnePrep also leads on review sentiment (41% vs 0%) and ratings volume (722 vs 1). ETT Prep's advantage is ads (none vs shown). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. OnePrep sells 24 in-app purchases, starting at $28.49 per 7 days and ETT Prep sells 9 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

OnePrep holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: OnePrep has 722 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 41% of OnePrep's written reviews are positive against 0% of ETT Prep's.

OnePrep ships an update every 5 days, ETT Prep weekly. The most recent releases landed on October 30, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | OnePrep | ETT Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (722 ratings)](https://appshunter.io/ios/app/oneprep-sat-and-act-prep/id6755932961/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/ett-prep/id6757318362/reviews) |
| Number of ratings | **722** | 1 |
| Positive reviews | **40.7% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Weekly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 88 MB | 46 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MyDojo Inc.](https://appshunter.io/developer/1854476769) | [A One Institute](https://appshunter.io/developer/1524365853) |

## What reviewers say

### OnePrep

[App page](https://appshunter.io/ios/app/oneprep-sat-and-act-prep/id6755932961)

Prepare for the SAT with a comprehensive study tool. Access thousands of practice questions, realistic mock exams, and AI-powered feedback. Get personalized guidance from an AI tutor to identify and improve weak areas for your dream score.

**Highlights:** Thousands of SAT-style practice questions, Realistic timed mock exams, Instant AI feedback and grading, Personalized study guidance, Progress tracking, Cross-device compatibility

**In-app purchases (24)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OnePrep Pro (1 Week) | $28.49 | per 7 days |
| OnePrep Plus (1 month) | $89.99 | per month |
| OnePrep Pro (1 Month) | $99.99 | per month |
| OnePrep Pro – Monthly | $99.99 | per month |
| OnePrep Plus (3 months) | $239.00 | per 3 months |
| OnePrep Pro (3 Months) | $269.00 | per 3 months |
| OnePrep Pro – 3 Months | $269.00 | per 3 months |
| OnePrep Plus (6 months) | $354.99 | per 6 months |
| OnePrep Pro (6 Months) | $414.99 | per 6 months |
| OnePrep Pro – 6 Months | $414.99 | per 6 months |
| OnePrep Plus (1 year) | $469.00 | per year |
| OnePrep Pro (1 Year) | $589.00 | per year |
| OnePrep Pro – Yearly | $589.00 | per year |
| OnePrep Plus Exam Pass (8-14 Days) | $80.00 | one-time |
| OnePrep Plus Exam Pass (15-28 Days) | $85.00 | one-time |
| OnePrep Pro Exam Pass (0-7 Days) | $89.00 | one-time |
| OnePrep Pro Exam Pass (8-14 Days) | $90.00 | one-time |
| OnePrep Pro Exam Pass (15-28 Days) | $95.00 | one-time |
| OnePrep Pro Exam Pass (29-30 Days) | $99.00 | one-time |
| OnePrep Pro Exam Pass (31-44 Days) | $134.99 | one-time |
| OnePrep Pro Exam Pass (45-58 Days) | $174.99 | one-time |
| OnePrep Pro Exam Pass (59-72 Days) | $209.99 | one-time |
| OnePrep Plus Exam Pass (8-10 Mos) | $429.00 | one-time |
| OnePrep Plus Exam Pass (10+ Months) | $464.99 | one-time |


### 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 OnePrep free?

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

### Is ETT Prep free?

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

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

OnePrep is rated higher. OnePrep averages 4.7 out of 5 from 722 ratings, while ETT Prep averages 3.0 from 1 ratings.

### Do OnePrep or ETT Prep have ads?

OnePrep shows ads; ETT Prep does not.

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

OnePrep ships an update every 5 days, and ETT Prep weekly. Most recently, OnePrep 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.*