# Estratum vs All Dai

The clearest difference is iOS requirement: Estratum at 18.0 against All Dai's 27.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Estratum sells 2 one-off in-app purchases and All Dai sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Estratum ships an update every 10 days, All Dai weekly. The most recent releases landed on November 10, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Estratum | All Dai |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Weekly** |
| Size | 29 MB | 5 MB |
| Requires iOS | **18.0** | 27.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [LyXeoN](https://appshunter.io/developer/566849105) | [implicitli, LLC](https://appshunter.io/developer/1131851058) |

## 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 |


### All Dai

[App page](https://appshunter.io/ios/app/all-dai/id6819907843)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Dai Plus (Monthly) | $0.99 | per month |
| All Dai Plus (Yearly) | $7.99 | per year |


## Frequently asked questions

### Is Estratum free?

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

### Is All Dai free?

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

### Do Estratum or All Dai have ads?

Neither Estratum nor All Dai shows ads.

### Which is updated more often, Estratum or All Dai?

Estratum ships an update every 10 days, and All Dai weekly. Most recently, Estratum was updated on November 10, 2026 and All Dai 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.*