# Estratum vs Anduryl

The clearest difference is in-app purchases: Anduryl at none against Estratum's 2. Anduryl also leads on update cadence (every 5 days vs every 10 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Estratum sells 2 one-off in-app purchases. Anduryl asks for nothing beyond the download.

Estratum ships an update every 10 days, Anduryl every 5 days. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Estratum | Anduryl |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 5 days** |
| Size | 29 MB | 7 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [LyXeoN](https://appshunter.io/developer/566849105) | [Samuel Velazquez](https://appshunter.io/developer/1815887383) |

## What reviewers say

### Estratum

[App page](https://appshunter.io/ios/app/estratum-second-brain/id6795179990)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 14-day Trial | Free | one-time |
| Estratum Pro — Lifetime | $17.99 | one-time |


### Anduryl

[App page](https://appshunter.io/ios/app/anduryl/id6795675755)

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

**In-app purchases:** none


## Frequently asked questions

### Is Estratum free?

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

### Is Anduryl free?

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

### Do Estratum or Anduryl have ads?

Neither Estratum nor Anduryl shows ads.

### Which is updated more often, Estratum or Anduryl?

Estratum ships an update every 10 days, and Anduryl every 5 days. Most recently, Estratum was updated on November 6, 2026 and Anduryl 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.*