# Foqos vs Estratum

The clearest difference is update cadence: Estratum at every 10 days against Foqos's every 3 months. Foqos's advantage is device support (4 vs 2) and iOS requirement (15.0 vs 18.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Foqos sells 1 one-off in-app purchase and Estratum sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Foqos ships an update every 3 months, Estratum every 10 days. The most recent releases landed on November 5, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Foqos | Estratum |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 10 days** |
| Size | 135 MB | 29 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jeffrey Asante](https://appshunter.io/developer/1828441141) | [LyXeoN](https://appshunter.io/developer/566849105) |

## What reviewers say

### Foqos

[App page](https://appshunter.io/ios/app/foqos-private-ai-notes/id6759393527)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Foqos Pro (Lifetime) | $14.99 | one-time |


### 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 |


## Frequently asked questions

### Is Foqos free?

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

### Is Estratum free?

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

### Do Foqos or Estratum have ads?

Neither Foqos nor Estratum shows ads.

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

Foqos ships an update every 3 months, and Estratum every 10 days. Most recently, Foqos was updated on November 5, 2026 and Estratum on November 6, 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.*