# Etch Memory vs Schema

The clearest difference is update cadence: Etch Memory at every 3 days against Schema's every 9 days. Schema's advantage is iOS requirement (18.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Etch Memory sells 3 in-app purchases, starting at $1.99 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.

Etch Memory ships an update every 3 days, Schema every 9 days. The most recent releases landed on September 9, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Etch Memory | 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 3 days** | Every 9 days |
| Monetization | — | Freemium |
| Size | 70 MB | 165 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [M&G Techworks](https://appshunter.io/developer/1795539424) | [Infinity Labs AG](https://appshunter.io/developer/1818442467) |

## What reviewers say

### Etch Memory

[App page](https://appshunter.io/ios/app/etch-memory/id6741780207)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Etch Lite | $1.99 | per month |
| Etch Pro | $4.99 | per month |
| Etch Max | $9.99 | per month |


### 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 Etch Memory free?

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

### Is Schema free?

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

### Do Etch Memory or Schema have ads?

Neither Etch Memory nor Schema shows ads.

### Which is updated more often, Etch Memory or Schema?

Etch Memory ships an update every 3 days, and Schema every 9 days. Most recently, Etch Memory was updated on September 9, 2026 and Schema on September 7, 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.*