# Encyclopedia vs Equation Encyclopedia

The clearest difference is ads: Encyclopedia at none against Equation Encyclopedia's shown. Equation Encyclopedia's advantage is update cadence (every 4 days vs every 3 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Encyclopedia sells 2 in-app purchases, starting at $4.99 per month and Equation Encyclopedia sells 9 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

Encyclopedia ships an update every 3 weeks, Equation Encyclopedia every 4 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | Encyclopedia | Equation Encyclopedia |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (7 ratings)](https://appshunter.io/ios/app/encyclopedia-kids-learning/id6758155526/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | Free | — |
| Size | 52 MB | 451 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zhenyu Zhou](https://appshunter.io/developer/1754372926) | [SAMUEL MOYOSORE O ADEYIGA](https://appshunter.io/developer/1874179107) |

## What reviewers say

### Encyclopedia

[App page](https://appshunter.io/ios/app/encyclopedia-kids-learning/id6758155526)

This app offers over 1,000 read-aloud topics for ages 5-12, each with a short video. It encourages reading habits with a customizable rewards system and supports multiple child profiles within a family account. Content covers STEM, history, arts, and more.

**Highlights:** 1,000+ read-aloud topics, Paired educational videos, Customizable rewards system, Daily streak tracking, Multi-child family accounts, Offline progress tracking, Flashcard decks (beta)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Encyclopedia Premium | $4.99 | per month |
| Encyclopedia Premium | $34.99 | per year |


### Equation Encyclopedia

[App page](https://appshunter.io/ios/app/equation-encyclopedia/id6758647681)

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Monthly | $6.99 | per month |
| Pro Monthly | $10.99 | per month |
| Ultra Monthly | $17.99 | per month |
| Plus Yearly | $49.99 | per year |
| Pro Yearly | $99.99 | per year |
| Ultra Yearly | $149.99 | per year |
| 10 Energy | $0.99 | one-time |
| 30 Energy | $2.99 | one-time |
| 100 Energy | $8.99 | one-time |


## Frequently asked questions

### Is Encyclopedia free?

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

### Is Equation Encyclopedia free?

Equation Encyclopedia is free to download, with in-app purchases available.

### Do Encyclopedia or Equation Encyclopedia have ads?

Equation Encyclopedia shows ads; Encyclopedia does not.

### Which is updated more often, Encyclopedia or Equation Encyclopedia?

Encyclopedia ships an update every 3 weeks, and Equation Encyclopedia every 4 days. Most recently, Encyclopedia was updated on October 25, 2026 and Equation Encyclopedia on October 25, 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.*