# AP Physics C, 2e vs LumiSource

The clearest difference is in-app purchases: LumiSource at none against AP Physics C, 2e's 5. LumiSource also leads on update cadence (every 3 months vs every 7 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. AP Physics C, 2e sells 5 in-app purchases, starting at $5.99 per 7 days. LumiSource asks for nothing beyond the download.

AP Physics C, 2e ships an update every 7 months, LumiSource every 3 months. The most recent releases landed on October 4, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | AP Physics C, 2e | LumiSource |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (91 ratings)](https://appshunter.io/ios/app/lumisource-exam-prep/id6746340356/reviews)** |
| Number of ratings | — | **91** |
| Positive reviews | — | 93.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 months** |
| Monetization | — | Free |
| Size | 57 MB | 81 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Expanded Apps](https://appshunter.io/developer/313709778) | [CaseHippo Inc](https://appshunter.io/developer/1551575873) |

## What reviewers say

### AP Physics C, 2e

[App page](https://appshunter.io/ios/app/ap-physics-c-2e-test-prep/id1578353209)

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Week | $5.99 | per 7 days |
| 1 Week | $6.99 | per 7 days |
| 1 Month | $17.99 | per month |
| 1 Year | $69.99 | per year |
| AP Physics C, 2e - Test Prep | $15.99 | one-time |


### 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


## Frequently asked questions

### Is AP Physics C, 2e free?

AP Physics C, 2e is free to download, with in-app purchases available.

### Is LumiSource free?

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

### Do AP Physics C, 2e or LumiSource have ads?

Neither AP Physics C, 2e nor LumiSource shows ads.

### Which is updated more often, AP Physics C, 2e or LumiSource?

AP Physics C, 2e ships an update every 7 months, and LumiSource every 3 months. Most recently, AP Physics C, 2e was updated on October 4, 2026 and LumiSource on October 16, 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.*