# Knowledge Nerds vs Encyclopedia

The clearest difference is update cadence: Encyclopedia at every 3 weeks against Knowledge Nerds's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Knowledge Nerds sells 10 one-off in-app purchases 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.

Knowledge Nerds ships an update every 2 months, Encyclopedia every 3 weeks. The most recent releases landed on October 6, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Knowledge Nerds | Encyclopedia |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 146 MB | 565 MB |
| Requires iOS | 15.5 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Online Learning](https://appshunter.io/developer/1790866777) | [Good Spider, LLC](https://appshunter.io/developer/1487595667) |

## What reviewers say

### Knowledge Nerds

[App page](https://appshunter.io/ios/app/knowledge-nerds/id6753704280)

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Package - AV | $34.99 | one-time |
| Package - AY | $39.99 | one-time |
| Package - AZ | $39.99 | one-time |
| Package - BB | $39.99 | one-time |
| Package - BD | $39.99 | one-time |
| Package - AW | $39.99 | one-time |
| Package - BE | $44.99 | one-time |
| Package - BG | $49.99 | one-time |
| Package - BH | $49.99 | one-time |
| Package - BF | $49.99 | 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 Knowledge Nerds free?

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

### Is Encyclopedia free?

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

### Do Knowledge Nerds or Encyclopedia have ads?

Neither Knowledge Nerds nor Encyclopedia shows ads.

### Which is updated more often, Knowledge Nerds or Encyclopedia?

Knowledge Nerds ships an update every 2 months, and Encyclopedia every 3 weeks. Most recently, Knowledge Nerds was updated on October 6, 2026 and Encyclopedia on October 11, 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.*