# First05 vs Estratum

The clearest difference is in-app purchases: First05 at none against Estratum's 1. First05 also leads on update cadence (every 2 days vs every 9 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Estratum sells 1 one-off in-app purchase. First05 asks for nothing beyond the download.

First05 ships an update every 2 days, Estratum every 9 days. The most recent releases landed on October 31, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | First05 | Estratum |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 9 days |
| Size | 4 MB | 28 MB |
| Requires iOS | **17.6** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Rapro](https://appshunter.io/developer/6772112879) | [LyXeoN](https://appshunter.io/developer/566849105) |

## What reviewers say

### First05

[App page](https://appshunter.io/ios/app/first05/id6772112877)

**In-app purchases:** none


### Estratum

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

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Estratum Pro — Lifetime | $24.99 | one-time |


## Frequently asked questions

### Is First05 free?

First05 is free to download, with no in-app purchases.

### Is Estratum free?

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

### Do First05 or Estratum have ads?

Neither First05 nor Estratum shows ads.

### Which is updated more often, First05 or Estratum?

First05 ships an update every 2 days, and Estratum every 9 days. Most recently, First05 was updated on October 31, 2026 and Estratum on October 24, 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.*