Estratum: Second Brain
ADHD, Focus & Mental Clarity
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Save with Siri, write or photograph. Ask to find your notes and see your day in one thread, on iPad too. Start free; Pro is a one-time purchase.
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.
CAPTURE WITH SIRI, TOO
Save a note with Siri or Shortcuts without finding the app first. Text is saved before confirmation and organized when Estratum opens. Voice and dictation depend on Apple.
YOUR DAY, IN ONE THREAD
See appointments, tasks and dated items in a timeline centered on today. Move into the past or future and return to today when you need to.
MORE ROOM, ON IPAD AND IPHONE DUO TOO
On iPad and an open iPhone Duo, keep your timeline in view while writing. Notes shows list and detail together; Calendar pairs the month with your agenda. Close Duo to return to one column. When partially folded, content stays clear of the hinge. Draft text survives display changes.
YOUR MEMORY CAN LIVE ON YOUR DEVICE
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.
Local AI depends on device compatibility and memory. Below 6 GB RAM, Qwen is not offered; Apple's model appears only when available. Without a compatible local engine, you need to configure your own external-provider API key, subject to that provider's 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.
On compatible systems and devices, Apple PCC is another optional cloud engine: it requires consent and internet, may send text and context to Apple, and has a quota separate from Pro.
ESTRATUM REMEMBERS FOR YOU. PRO NOTICES, TOO.
Free includes the same AI, every engine, unlimited saves, basic reminders and 7 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 device. With Pro, 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.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• Adapted for iPhone Duo with iOS 27.1: outer and inner displays, system navigation, and content kept clear of the hinge when partially folded.
• On wider screens, keep your mental thread in view while writing. Drafts stay in place when opening, closing or rotating the device.
• A more compact editor with the landscape keyboard. Calendar keeps the input visible when adding an appointment and includes a button to dismiss the keyboard.
• The timeline orb rotates gently again and respects Reduce Motion.
• Clearer Settings guidance on choosing an AI model, memory requirements, and local processing versus optional cloud engines.
The developer, LyXeoN, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- User Content
- Search History
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- bruno pardini lobo
- Size
- 29.8 MB
- Category
- Productivity
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English and Spanish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Estratum Pro — Lifetime $24.99
- Copyright
- © 2026 Bruno Pardini