# Equation Encyclopedia vs Encyclopedia

The clearest difference is ads: Encyclopedia at none against Equation Encyclopedia's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Equation Encyclopedia sells 9 in-app purchases, starting at $6.99 per month and Encyclopedia sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Equation Encyclopedia ships an update every 4 days, Encyclopedia every 5 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Equation Encyclopedia | Encyclopedia |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 4 days** | Every 5 days |
| Size | 451 MB | 565 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [SAMUEL MOYOSORE O ADEYIGA](https://appshunter.io/developer/1874179107) | [Good Spider, LLC](https://appshunter.io/developer/1487595667) |

## What reviewers say

### 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 |


### Encyclopedia

[App page](https://appshunter.io/ios/app/encyclopedia-human-body/id6805132224)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $2.99 | per month |
| Annual Premium | $19.99 | per year |
| Full Encyclopedia | $9.99 | one-time |


## Frequently asked questions

### Is Equation Encyclopedia free?

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

### Is Encyclopedia free?

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

### Do Equation Encyclopedia or Encyclopedia have ads?

Equation Encyclopedia shows ads; Encyclopedia does not.

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

Equation Encyclopedia ships an update every 4 days, and Encyclopedia every 5 days. Most recently, Equation Encyclopedia was updated on November 5, 2026 and Encyclopedia on October 31, 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.*