# LumiSource vs AP Prep

The clearest difference is in-app purchases: LumiSource at none against AP Prep's 3. LumiSource also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). AP Prep's advantage is update cadence (every 2 weeks vs every 3 months). On price and ads there is nothing between them.

Both are free to download. AP Prep sells 3 in-app purchases, starting at $9.99 per month. LumiSource asks for nothing beyond the download.

LumiSource ships an update every 3 months, AP Prep every 2 weeks. The most recent releases landed on October 28, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | LumiSource | AP Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (130 ratings)](https://appshunter.io/ios/app/lumisource-exam-prep/id6746340356/reviews)** | — |
| Number of ratings | **130** | — |
| Positive reviews | 93.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 81 MB | 12 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [CaseHippo Inc](https://appshunter.io/developer/1551575873) | [Shanghai Xushu Information Technology Co., Ltd.](https://appshunter.io/developer/1733615663) |

## 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


### AP Prep

[App page](https://appshunter.io/ios/app/ap-prep-practice-and-score/id6783233848)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AP Prep Pro Monthly | $9.99 | per month |
| AP Prep Pro 3-Month | $19.99 | per 3 months |
| AP Prep Pro — Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is LumiSource free?

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

### Is AP Prep free?

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

### Do LumiSource or AP Prep have ads?

Neither LumiSource nor AP Prep shows ads.

### Which is updated more often, LumiSource or AP Prep?

LumiSource ships an update every 3 months, and AP Prep every 2 weeks. Most recently, LumiSource was updated on October 28, 2026 and AP Prep on October 17, 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.*