# LumiSource vs PrepGo

The clearest difference is review sentiment: LumiSource at 93% against PrepGo's 23%. LumiSource also leads on rating (4.8 vs 4.3) and in-app purchases (none vs 10). PrepGo's advantage is update cadence (every 9 days vs every 3 months). On price, ratings volume, ads and device support there is nothing between them.

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

LumiSource holds the better App Store score, 4.8 against 4.3. Both are backed by a comparable volume of ratings — 146 and 315 respectively. Written reviews point the same way: 93% of LumiSource's written reviews are positive against 23% of PrepGo's.

LumiSource ships an update every 3 months, PrepGo every 9 days. Both last shipped on November 5, 2026.

## The numbers

| Metric | LumiSource | PrepGo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (146 ratings)](https://appshunter.io/ios/app/lumisource-exam-prep/id6746340356/reviews)** | [4.3 (315 ratings)](https://appshunter.io/ios/app/prepgo-ap-exam-prep/id6753966286/reviews) |
| Number of ratings | 146 | **315** |
| Positive reviews | **93.3% of reviews** | 22.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 9 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 81 MB | 84 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CaseHippo Inc](https://appshunter.io/developer/1551575873) | [StudyX Inc.](https://appshunter.io/developer/1571844481) |

## 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


### 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 LumiSource free?

LumiSource 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, LumiSource or PrepGo?

LumiSource is rated higher. LumiSource averages 4.8 out of 5 from 146 ratings, while PrepGo averages 4.3 from 315 ratings.

### Do LumiSource or PrepGo have ads?

Neither LumiSource nor PrepGo shows ads.

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

LumiSource ships an update every 3 months, and PrepGo every 9 days. Most recently, LumiSource was updated on November 5, 2026 and PrepGo on November 5, 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.*