# OnePrep vs Korah

The clearest difference is rating: OnePrep at 4.7 against Korah's 1.0. OnePrep also leads on ratings volume (714 vs 1) and iOS requirement (15.1 vs 26.0). Korah's advantage is in-app purchases (none vs 24) and ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. OnePrep sells 24 in-app purchases, starting at $28.49 per 7 days. Korah asks for nothing beyond the download.

OnePrep holds the better App Store score, 4.7 against 1.0. That said, the two scores are not equally well evidenced: OnePrep has 714 ratings behind it against 1, so its average is the more settled of the two.

OnePrep ships an update every 5 days, Korah every 4 days. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | OnePrep | Korah |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (714 ratings)](https://appshunter.io/ios/app/oneprep-sat-and-act-prep/id6755932961/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/korah/id6757345573/reviews) |
| Number of ratings | **714** | 1 |
| Positive reviews | 40.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 days | **Every 4 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 88 MB | 39 MB |
| Requires iOS | **15.1** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [MyDojo Inc.](https://appshunter.io/developer/1854476769) | [Oscar Euceda](https://appshunter.io/developer/1866263051) |

## 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 |


### Korah

[App page](https://appshunter.io/ios/app/korah/id6757345573)

This AI-powered tutor helps students prepare for the SAT with adaptive practice, personalized study plans, and detailed analytics. Get on-demand help with questions and track your progress towards your score goals.

**Highlights:** Adaptive practice sets, Personalized study plans, AI tutor for question help, Performance analytics, Score goal tracking, Extensive question bank

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

**In-app purchases:** none


## Frequently asked questions

### Is OnePrep free?

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

### Is Korah free?

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

### Which has better reviews, OnePrep or Korah?

OnePrep is rated higher. OnePrep averages 4.7 out of 5 from 714 ratings, while Korah averages 1.0 from 1 ratings.

### Do OnePrep or Korah have ads?

OnePrep shows ads; Korah does not.

### Which is updated more often, OnePrep or Korah?

OnePrep ships an update every 5 days, and Korah every 4 days. Most recently, OnePrep was updated on October 28, 2026 and Korah on October 24, 2026.

---

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