# Equation Encyclopedia vs Qedra

The clearest difference is in-app purchases: Qedra at none against Equation Encyclopedia's 9. Equation Encyclopedia's advantage is update cadence (every 4 days vs every 10 days) and iOS requirement (15.0 vs 18.0). On price, ads 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. Qedra asks for nothing beyond the download.

Equation Encyclopedia ships an update every 4 days, Qedra every 10 days. The most recent releases landed on September 8, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Equation Encyclopedia | Qedra |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 4 days** | Every 10 days |
| Size | 451 MB | 22 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SAMUEL MOYOSORE O ADEYIGA](https://appshunter.io/developer/1874179107) | [Matthew Wong](https://appshunter.io/developer/6774040057) |

## 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 |


### Qedra

[App page](https://appshunter.io/ios/app/qedra-university-math-solver/id6803934326)

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

**In-app purchases:** none


## Frequently asked questions

### Is Equation Encyclopedia free?

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

### Is Qedra free?

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

### Do Equation Encyclopedia or Qedra have ads?

Both Equation Encyclopedia and Qedra show ads.

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

Equation Encyclopedia ships an update every 4 days, and Qedra every 10 days. Most recently, Equation Encyclopedia was updated on September 8, 2026 and Qedra on September 18, 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.*