# LumiSource vs OnePrep

LumiSource and OnePrep both sit at 4.8 stars, but that hides the real split: 93% of LumiSource's written reviews are positive against 41% of OnePrep's. LumiSource also leads on in-app purchases (none vs 10) and ads (none vs shown). OnePrep's advantage is update cadence (every 5 days vs every 3 months) and ratings volume (735 vs 146). On price, rating, device support and iOS requirement there is nothing between them.

Both are free to download. OnePrep sells 10 in-app purchases, starting at $28.49 per 7 days. LumiSource asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.8 for LumiSource against 4.7 for OnePrep. That said, the two scores are not equally well evidenced: OnePrep has 735 ratings behind it against 146, so its average is the more settled of the two. Written reviews are what separate them: 93% of LumiSource's written reviews are positive against 41% of OnePrep's.

LumiSource ships an update every 3 months, OnePrep every 5 days. Both last shipped on November 5, 2026.

## The numbers

| Metric | LumiSource | OnePrep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (146 ratings)](https://appshunter.io/ios/app/lumisource-exam-prep/id6746340356/reviews)** | [4.7 (735 ratings)](https://appshunter.io/ios/app/oneprep-sat-and-act-prep/id6755932961/reviews) |
| Number of ratings | 146 | **735** |
| Positive reviews | **93.3% of reviews** | 40.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 5 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 81 MB | 88 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CaseHippo Inc](https://appshunter.io/developer/1551575873) | [MyDojo Inc.](https://appshunter.io/developer/1854476769) |

## What reviewers say

### LumiSource

[App page](https://appshunter.io/ios/app/lumisource-exam-prep/id6746340356)

Prepare for AP exams with condensed study guides and realistic practice tests. This app offers mobile-optimized content for efficient review anytime, anywhere. It currently supports over 10 AP subjects.

**Highlights:** Condensed study guides, Realistic practice tests, Detailed answer breakdowns, Mobile-optimized for on-the-go study, Supports over 10 AP subjects

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

**In-app purchases:** none


### 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 (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OnePrep Pro (1 Week) | $28.49 | per 7 days |
| OnePrep Pro (1 Month) | $99.99 | per month |
| OnePrep Pro (3 Months) | $269.00 | per 3 months |
| 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 (31-44 Days) | $134.99 | one-time |
| OnePrep Pro Exam Pass (45-58 Days) | $174.99 | one-time |


## Frequently asked questions

### Is LumiSource free?

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

### Is OnePrep free?

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

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

LumiSource is rated higher. LumiSource averages 4.8 out of 5 from 146 ratings, while OnePrep averages 4.7 from 735 ratings.

### Do LumiSource or OnePrep have ads?

OnePrep shows ads; LumiSource does not.

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

LumiSource ships an update every 3 months, and OnePrep every 5 days. Most recently, LumiSource was updated on November 5, 2026 and OnePrep on November 5, 2026.

---

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