# Knowledge vs Schema

The clearest difference is update cadence: Schema at every 9 days against Knowledge's every 6 weeks. Knowledge's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 18.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Knowledge sells 2 in-app purchases, starting at $14.99 per month and Schema sells 2 in-app purchases, starting at $14.99 per month. Whichever you choose, the download price is not the number that matters.

Knowledge ships an update every 6 weeks, Schema every 9 days. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Knowledge | Schema |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/schema-knowledge-compounding/id6747011799/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 9 days** |
| Monetization | — | Freemium |
| Size | 80 MB | 165 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SocialShift, Corp](https://appshunter.io/developer/1809686271) | [Infinity Labs AG](https://appshunter.io/developer/1818442467) |

## What reviewers say

### Knowledge

[App page](https://appshunter.io/ios/app/knowledge-untold-history-app/id6744873533)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $14.99 | per month |
| Premium Annual | $99.99 | per year |


### Schema

[App page](https://appshunter.io/ios/app/schema-knowledge-compounding/id6747011799)

This AI-powered learning companion helps you capture, summarize, and retain important ideas. It uses smart review intervals to ensure knowledge sticks, fostering deeper understanding for lifelong learners. Turn consumed information into lasting comprehension.

**Highlights:** Capture and organize key ideas, AI summarization, Spaced repetition reviews, Smart practice for retention, Build compounding mental leverage

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Schema Pro Monthly | $14.99 | per month |
| Schema Pro Yearly | $149.99 | per year |


## Frequently asked questions

### Is Knowledge free?

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

### Is Schema free?

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

### Do Knowledge or Schema have ads?

Neither Knowledge nor Schema shows ads.

### Which is updated more often, Knowledge or Schema?

Knowledge ships an update every 6 weeks, and Schema every 9 days. Most recently, Knowledge was updated on October 7, 2026 and Schema on October 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.*