# LumiSource vs Dolphin

The clearest difference is update cadence: Dolphin at every 2 weeks against LumiSource's every 3 months. Dolphin also leads on ratings volume (1.3K vs 91). LumiSource's advantage is monetization model (free vs free with in-app purchases) and review sentiment (93% vs 84%). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.8 for LumiSource against 4.8 for Dolphin. That said, the two scores are not equally well evidenced: Dolphin has 1.3K ratings behind it against 91, 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 84% of Dolphin's.

LumiSource ships an update every 3 months, Dolphin every 2 weeks. The most recent releases landed on October 16, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | LumiSource | Dolphin |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (91 ratings)](https://appshunter.io/ios/app/lumisource-exam-prep/id6746340356/reviews) | [4.8 (1.3K ratings)](https://appshunter.io/ios/app/dolphin-sat-prep/id6748280981/reviews) |
| Number of ratings | 91 | **1.3K** |
| Positive reviews | **93.3% of reviews** | 83.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 81 MB | 229 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [CaseHippo Inc](https://appshunter.io/developer/1551575873) | [PaloAI Inc.](https://appshunter.io/developer/1824977301) |

## 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


### Dolphin

[App page](https://appshunter.io/ios/app/dolphin-sat-prep/id6748280981)

Master the Digital SAT with a unique, social media-inspired interface. Swipe through thousands of official practice questions with instant, short video explanations. The app intelligently adapts to your learning, focusing on your weak areas for efficient score improvement.

**Highlights:** 10,000+ Official Digital SAT Questions, Short Video Solutions for Every Problem, Personalized Learning Algorithm, Spaced Repetition for Retention, Frictionless Study Design, Score Tracking

**In-app purchases:** none


## Frequently asked questions

### Is LumiSource free?

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

### Is Dolphin free?

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

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

LumiSource and Dolphin are both rated 4.8 out of 5 on the App Store, from 91 and 1.3K ratings respectively.

### Do LumiSource or Dolphin have ads?

Neither LumiSource nor Dolphin shows ads.

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

LumiSource ships an update every 3 months, and Dolphin every 2 weeks. Most recently, LumiSource was updated on October 16, 2026 and Dolphin on October 19, 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.*