Comparison

MemX vs Estratum

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

MemX

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
Read full description

MemX is your AI memory — a second brain that reads everything you save and answers in plain words, so you never dig through files again. We all have critical info scattered across photos, PDFs, WhatsApp messages, and voice notes. Searching it is a nightmare. MemX reads it all — even the text inside your photos, documents, and audio — then connects the dots so you can ask a question and find what matters in seconds. WHAT YOU CAN DO Search inside any document PDFs, contracts, leases, research papers, specs, statements, certificates. Drop them in once, then search inside them anytime — without opening the file, remembering the filename, or tagging anything. Record and transcribe any conversation Meetings, interviews, calls, lectures, doctor visits. MemX records, transcribes, and turns hours of audio into structured notes with action items. 100+ languages, mixed-language recordings in one session. Set reminders and to-dos by voice Just say it in plain words: "Remind me every Monday and Thursday to follow up with the client for the next six weeks." MemX sets the recurring reminders, ends them on time, and won't let them go until you mark them done. It even pulls to-dos out of your documents automatically. Bring in WhatsApp Forward documents, photos, voice notes, and full chat histories to MemX once — then search them forever. Pull up the contract a client sent or the doctor a friend recommended months ago. Capture from your camera Point your camera at a prescription, business card, whiteboard, contract clause, error screen, or napkin sketch. MemX reads what's inside and makes it searchable forever. THEN JUST ASK "What's the indemnification clause in the Acme contract?" "What were the action items from last Tuesday's review?" "When does my insurance policy expire?" No folders. No tags. No filenames. Ask in plain words — in any language — and your AI memory finds the answer inside the document, recording, photo, or chat where it lives. BUILT FOR PROFESSIONAL USE Search across every contract, spec, recording, and client document you've saved. Cross-reference findings across hundreds of research papers in one query. Pull up boarding passes, prescriptions, lab reports, bills, and warranties without opening a single file — your whole life, searchable. PRIVATE BY ARCHITECTURE Per-user encryption with keys only you control. Even the MemX team can't read your data — not as a policy, but as a property of the system itself. Your content is never used to train AI models. Delete everything, anytime. Stop remembering. Start asking. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Estratum

Features
Read full description

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.

Screenshots

MemX4 screens
Estratum4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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

Scorecard2 real differences · 7 level
MemX versus Estratum: the parameters behind the verdict, then further details
ParameterMemXEstratum
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyWeekly — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPod — betteriPhone
Requires iOS15.5 — better18.0
Further details — not scored
Size107 MB28 MB
Age rating12+4+
DeveloperNeural Forge TechnologiesLyXeoN

In-app purchases

6 purchases

MemX

Subscriptions6
  • MemX Starter$7.991 Month
  • MemX Pro14 Days trial$9.991 Month
  • MemX MAX$19.991 Month
Show 3 more
  • MemX Starter Annual$66.991 Year
  • MemX Pro Annual$99.991 Year
  • MemX MAX Annual$199.991 Year
1 purchases

Estratum

One-time1
  • Estratum Pro — Lifetime$24.99

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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