# Gridflo vs Estratum

The clearest difference is in-app purchases: Gridflo at none against Estratum's 1. Gridflo also leads on iOS requirement (16.4 vs 18.0). Estratum's advantage is update cadence (every 9 days vs monthly). On price, ads and device support there is nothing between them.

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

Gridflo ships an update monthly, Estratum every 9 days. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Gridflo | Estratum |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 9 days** |
| Size | 61 MB | 28 MB |
| Requires iOS | **16.4** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Mohamed El Beshlawi](https://appshunter.io/developer/1845525663) | [LyXeoN](https://appshunter.io/developer/566849105) |

## What reviewers say

### Gridflo

[App page](https://appshunter.io/ios/app/gridflo/id6753890159)

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

**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 Gridflo free?

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

### Is Estratum free?

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

### Do Gridflo or Estratum have ads?

Neither Gridflo nor Estratum shows ads.

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

Gridflo ships an update monthly, and Estratum every 9 days. Most recently, Gridflo was updated on October 28, 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.*