# Rhea vs Anomalous Phenomena

The clearest difference is in-app purchases: Rhea at none against Anomalous Phenomena's 2. Anomalous Phenomena's advantage is iOS requirement (15.1 vs 17.4). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Anomalous Phenomena sells 2 in-app purchases, starting at $4.99 per month. Rhea asks for nothing beyond the download.

Rhea ships an update every 2 months, Anomalous Phenomena every 3 months. The most recent releases landed on November 8, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Rhea | Anomalous Phenomena |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/rhea-learn-history/id6745319924/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free | — |
| Size | 30 MB | 63 MB |
| Requires iOS | 17.4 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Martin Munilla](https://appshunter.io/developer/1811769423) | [Jeffery Rowe](https://appshunter.io/developer/1862911137) |

## What reviewers say

### Rhea

[App page](https://appshunter.io/ios/app/rhea-learn-history/id6745319924)

Engage with history through captivating, bite-sized stories instead of dry textbooks. Learn about civilizations and pivotal moments in under 10 minutes a day, track progress, and retain knowledge with smart quizzes.

**Highlights:** Narrative history lessons, Learn in under 10 minutes, Explore ancient civilizations, Smart quizzes and spaced repetition, Track learning progress, Weekly leaderboard

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

**In-app purchases:** none


### Anomalous Phenomena

[App page](https://appshunter.io/ios/app/anomalous-phenomena/id6758256331)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly Subscription | $4.99 | per month |
| Premium Yearly Subscription | $29.99 | per year |


## Frequently asked questions

### Is Rhea free?

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

### Is Anomalous Phenomena free?

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

### Do Rhea or Anomalous Phenomena have ads?

Neither Rhea nor Anomalous Phenomena shows ads.

### Which is updated more often, Rhea or Anomalous Phenomena?

Rhea ships an update every 2 months, and Anomalous Phenomena every 3 months. Most recently, Rhea was updated on November 8, 2026 and Anomalous Phenomena on November 9, 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.*