# Estratum: Second Brain — ADHD, Focus & Mental Clarity

> ADHD, Focus & Mental Clarity (iPhone/iPad app by LyXeoN.)

- Source: https://appshunter.io/ios/app/estratum-second-brain/id6795179990 (this page in markdown: same URL + `.md`)
- Developer: [LyXeoN](https://appshunter.io/developer/566849105)
- Category: Productivity, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.0 · 28 MB
- Languages: American English, European Spanish
- Released: 2026-09-02
- Data updated: 2026-10-01
- User reviews in markdown: https://appshunter.io/ios/app/estratum-second-brain/id6795179990/reviews.md

## What is Estratum?

LESS NOISE IN YOUR HEAD. MORE CLARITY IN YOUR DAY.

How much energy do you spend trying not to forget an appointment, an idea, a task or a small
detail you may need later?

Estratum reduces that mental load. Write down what is on your mind and get back to your day: it
saves it, organizes it and helps you find it when it matters again.

CAPTURE BEFORE IT SLIPS AWAY

Write, dictate or photograph a printed appointment, a receipt, a whiteboard or a set of
instructions. No folders, categories or tags to prepare. Organization happens afterwards.

AI DOES THE INVISIBLE WORK

Estratum recognizes notes, tasks, appointments, deadlines, expenses, ideas and memories. You
capture the moment; the app brings order to it.

Search by meaning retrieves the context even when you do not repeat the exact words you wrote.
Ask “What did we decide about Atlas?” or “What do I have tomorrow?” and open the notes behind the
answer.

TODAY AND TOMORROW, AT A GLANCE

The intelligent TODAY section brings together appointments, tasks and dated items from Home and
Work, so you do not start by checking separate notes, calendars and lists. Swipe to prepare
TOMORROW and use the calendar to see everything ahead.

YOUR MEMORY CAN LIVE ON YOUR IPHONE

With a local engine, Estratum organizes, searches and answers on-device. After the initial
download it can work without internet: your notes are not sent to a server, no account is
required, and there are no token or query fees.

If you prefer an external provider, connect your own OpenAI or OpenRouter key. The app warns you
before sending the required context to the provider you choose.

FREE THINKS THE SAME. PRO THINKS MORE ABOUT YOU.

Free includes the same AI, every engine, unlimited saves, basic reminders and 15 questions per
week.

Estratum Pro adds unlimited questions, Knowledge Map, Journal, reminders that choose a useful
lead time, and automatic Home/Work switching. Unlock it with one purchase—no subscription or
recurring fee.

Designed for people with ADHD, neurodivergent minds and anyone living with a high mental load.
Estratum does not diagnose or treat any condition.

YOUR LIFE IS YOURS

The main database lives on your iPhone. Apple Calendar integration is optional and writes to a
separate calendar. No ads. No selling your data.

Write it down. Estratum takes care of the order.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

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



## Version history (last 2 releases)

### 1.1.2 — 2026-09-03

• Improved automatic AI model selection on iPhones with limited memory, preventing crashes and choosing the most reliable available option.
• Fixed initial download progress so the counter restarts correctly after a retry instead of accumulating data from the previous attempt.

### 1.1.0 — 2026-09-03

No release notes.

## Apps similar to Estratum

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Memz LLM](https://appshunter.io/ios/app/memz-llm/id6777074142) | — | Free | Productivity |
| [Nemos: Voice Recorder & Notes](https://appshunter.io/ios/app/nemos-voice-recorder-and-notes/id6791134304) | 5.0 (2) | Free | Productivity |
| [Second Brain - Know Yourself](https://appshunter.io/ios/app/second-brain-know-yourself/id6760254340) | 4.0 (1) | Free | Productivity |
| [Ink: Notes, Lists & To-Dos](https://appshunter.io/ios/app/ink-notes-lists-and-to-dos/id6763797883) | 5.0 (2) | Free | Productivity |
| [Offbit: Screen Time](https://appshunter.io/ios/app/offbit-screen-time/id6800112391) | — | Free | Productivity |
| [Cumbersome: AI LLM API Client](https://appshunter.io/ios/app/cumbersome-ai-llm-api-client/id6753016821) | 4.9 (83) | Free | Productivity |

## More apps by LyXeoN

- [Orienta2 Orientación Académica](https://appshunter.io/ios/app/orienta2-orientacion-academica/id6480015149)

All apps by LyXeoN: https://appshunter.io/developer/566849105

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-01.*