MemX vs Rewind — AI Memory App vs Screen Recorder

Rewind continuously recorded your Mac screen and audio so you could search your past. MemX captures only what you choose — documents, photos, voice notes, WhatsApp — and answers your questions with citations.

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Rewind was a macOS app that ran in the background and continuously recorded everything on your screen plus your audio, letting you scroll back and search your digital history in natural language. After Rewind AI rebranded to Limitless and pivoted to a wearable Pendant, Meta acquired the company in December 2025 and the original Rewind Mac app was shut down, with screen and audio capture disabled on December 19, 2025.

Because the always-on Rewind recorder is no longer available, the practical comparison today is between two very different approaches to a personal memory: a desktop tool that captured everything passively, and MemX, a mobile-first AI second brain — live on Android, with iOS in TestFlight beta — where you decide what to capture.

Instead of recording your whole screen, you dump documents, photos, scanned files, voice notes and WhatsApp chats into MemX. The AI reads and indexes them, and you ask questions in plain English to get answers with citations back to the original source. MemX can also turn a phrase like "antibiotics twice daily for 5 days" into a full schedule of timed reminders you confirm, and shows your captured dates on a built-in Calendar view alongside Chat and Memories.

Feature Comparison

FeatureMemXRewind
Currently available to new users Yes No
AI-powered Q&A with citations to source YesAsk Rewind (recordings, discontinued)
Continuous screen recording NoWas core (discontinued)
Capture only what you choose Yes No
Document scanning with OCR Yes No
Photo memory (auto-flags receipts, IDs, prescriptions) Yes No
Voice to Memory (Whisper transcription) YesMeeting audio
Multi-language transcription YesUnclear
WhatsApp import Yes No
Smart reminders you approve Yes No
Recurring reminders from plain language Yes No
Per-document AES-256 encryption YesLocal AES-256
No AI training on your content YesUnclear
Full data export anytime YesExport before shutdown
Mobile-first capture on the go Yes No
PlatformsAndroid, iOS (beta), WhatsApp, Web (Coming Soon)Mac (discontinued)

Why Choose MemX Over Rewind?

You Choose What to Capture

Rewind recorded your entire screen and audio in the background, which raised obvious privacy questions. MemX flips that: you capture only the documents, photos, voice notes and WhatsApp chats you want remembered. Vacation photos and selfies are kept out, and private photos never leave your device. Smart-tag extraction also pulls details like Aadhaar, PAN and driving-licence numbers — plus locker numbers and Wi-Fi passwords — out of ID screenshots that would otherwise sit unindexed in your camera roll.

Answers With Citations, Not Just Search

Rewind let you search and replay what it recorded. Ask MemX runs vector search across everything you have captured and returns a synthesized answer along with citations back to the exact source document, so you can verify where the answer came from.

Built for Mobile, Not the Desktop

Rewind was a Mac app for capturing your computer activity. MemX is mobile-first, live on Android, with iOS in TestFlight beta, plus a WhatsApp integration, so you can scan a prescription, snap a receipt or record a 60-second voice note wherever you are. A web interface is Coming Soon.

Available Now, Built for Privacy

The original Rewind app was discontinued after Meta acquired Limitless. MemX is actively available, encrypts every document with AES-256, keeps its master key in Google Cloud KMS hardware security vaults, logs every access to a tamper-proof audit log, and never trains AI on your content.

Frequently asked questions

No. After Rewind AI rebranded to Limitless and shifted to a wearable Pendant, Meta acquired the company in December 2025. The original Rewind Mac app was sunset, and screen and audio capture were disabled on December 19, 2025. If you are looking for a current personal AI memory, MemX is live on Android, with iOS in TestFlight beta.
Rewind was a Mac app that continuously recorded your screen and audio so you could search your past. MemX is a mobile AI memory app where you choose what to capture — documents, photos, voice notes and WhatsApp chats — and ask questions in plain English to get answers with citations to the source.
MemX is a good alternative if you want a personal AI second brain rather than a screen recorder. Instead of capturing everything on your desktop, you upload the documents, photos and voice notes you care about, and MemX reads, indexes and answers questions about them. It is available on Android, iOS (TestFlight beta) and WhatsApp, with a web interface Coming Soon.
No. MemX does not run in the background recording your screen or audio. You explicitly capture what you want remembered — scan a document, snap a photo, record a voice note or import a WhatsApp chat. On-device photo ML flags receipts, IDs and prescriptions while keeping vacation photos and selfies out, and private photos never leave your device.
MemX encrypts every document at rest with AES-256, with a master key stored in Google Cloud KMS hardware security vaults and per-document encryption that decrypts on demand. Every access is written to a tamper-proof audit log, operator access is need-to-know only, your content is never used to train AI, and you can export all your data anytime.

Sources

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