# MemX vs Estratum

The clearest difference is update cadence: MemX at weekly against Estratum's every 2 weeks. MemX also leads on iOS requirement (15.5 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. MemX sells 6 in-app purchases, starting at $7.99 per month and Estratum sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

MemX ships an update weekly, Estratum every 2 weeks. The most recent releases landed on October 14, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | MemX | Estratum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/memx-ai-memory-agent/id6761420624/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | Freemium | — |
| Size | 107 MB | 28 MB |
| Requires iOS | **15.5** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Neural Forge Technologies](https://appshunter.io/developer/1889515642) | [LyXeoN](https://appshunter.io/developer/566849105) |

## What reviewers say

### MemX

[App page](https://appshunter.io/ios/app/memx-ai-memory-agent/id6761420624)

This app acts as a digital second brain, allowing you to search and retrieve information from various sources like documents, photos, and audio recordings. It uses AI to transcribe conversations, set reminders, and extract key details, making your saved content easily searchable through natural language queries.

**Highlights:** Search inside any document (PDFs, contracts, etc.), Record and transcribe conversations (100+ languages), Set recurring voice reminders and to-dos, Integrate WhatsApp chats and files, Capture and search text from photos, Cross-reference information across multiple sources

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MemX Starter | $7.99 | per month |
| MemX Pro | $9.99 | per month |
| MemX MAX | $19.99 | per month |
| MemX Starter Annual | $66.99 | per year |
| MemX Pro Annual | $99.99 | per year |
| MemX MAX Annual | $199.99 | per year |


### 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 MemX free?

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

### Is Estratum free?

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

### Do MemX or Estratum have ads?

Neither MemX nor Estratum shows ads.

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

MemX ships an update weekly, and Estratum every 2 weeks. Most recently, MemX was updated on October 14, 2026 and Estratum on October 17, 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.*