Comparison

MindMark AI vs Second Brain

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

Head to head
About

MindMark AI

Capture, organize, and instantly find information from various sources. This AI-powered tool automatically summarizes content and uses smart search to retrieve anything you need. Collaborate with others through shared folders for seamless idea exchange.

Highlights
  • Instant capture of links, text, and screenshots
  • AI-generated summaries and insights
  • Smart search by keyword, concept, or context
  • Automatic tagging and collection organization
  • Collaborative shared folders
  • Private and secure data storage
Features
Read full description

MindMark AI is your AI powered second brain. Capture what you read and watch, organize it automatically, and find anything later – now with a brand-new Chat and a beautifully redesigned experience. Key Features • Chat with your second brain – ask anything in natural language and get instant answers drawn from what you've saved • Save instantly – capture links, text, screenshots, or ideas in one tap • AI summaries and insights – understand key points without rereading • Smart search – find content by keyword, concept, or context • Auto tags and collections – your content is organized for you • Shared folders – collaborate and share ideas easily • A fresh new look – a clean, modern design that makes browsing your memories a joy • Private and secure – your data stays yours Stop losing ideas and start building your digital memory with MindMark AI, your personal hub for smarter thinking, learning, and productivity. MindMark Pro is an auto-renewable subscription offered as a monthly or yearly plan. Payment is charged to your Apple Account at confirmation of purchase. Your subscription renews automatically unless auto-renewal is turned off at least 24 hours before the end of the current period. You can manage or cancel your subscription in your Apple Account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms & Conditions: https://www.mindmark.ai/terms-conditions Privacy Policy: https://www.mindmark.ai/privacy-policy

About

Second Brain

This AI-powered journal captures your thoughts via voice or text, automatically organizing and connecting them. It helps you recall memories, discover patterns, and reflect on your growth.

Highlights
  • AI classification, tagging, and summarization
  • Semantic search by meaning
  • Three-layer memory system
  • People cards for relationship tracking
  • Weekly AI reflections
  • Voice input with transcription
  • Data export (JSON + Markdown)
Features
Read full description

The AI-powered journal that remembers everything. Capture thoughts by voice or text — AI organizes, connects, and recalls your memories so nothing is ever lost. Second Brain models how your mind actually works. Every memory is classified into three layers — instant thoughts, short-term plans, and long-term knowledge — then linked, reflected on, and surfaced exactly when you need it. CAPTURE IN SECONDS Type a thought or press and hold to speak. AI automatically classifies each memory, extracts tags, and generates a summary. No folders. No manual sorting. Just capture and move on. EXPLORE YOUR MEMORIES Ask anything: "What did I decide about the project?" or "What did Sarah say last week?" AI searches across all your memories using meaning — not just keywords — and weaves relevant ones into a clear, contextualized answer. PEOPLE MEMORY Create cards for the people in your life. Track what they said, shared experiences, meeting notes, and to-dos. Never forget a birthday, a promise, or a conversation again. WEEKLY REFLECTIONS Every week, AI reviews your memories, finds recurring themes, spots growth areas, and offers a concrete suggestion — like a thoughtful friend reading your journal. DISCOVER CONNECTIONS AI builds a knowledge graph across your memories, revealing patterns and links you never noticed. Watch your ideas form constellations over time. VOICE CAPTURE Press and hold to speak. Real-time transcription fills your memory instantly. Switch between English and Chinese with one tap. Perfect for capturing thoughts on the go. KEY FEATURES - Three-layer memory system inspired by cognitive science - AI classification, tagging, and summarization - Semantic search — find memories by meaning - Memory strength visualization with Ebbinghaus forgetting curve - People cards with relationship tracking - Daily, weekly, and monthly AI reflections - Voice input with real-time transcription - Theme clusters that reveal your thinking patterns - Memory connection graph - iCloud sync across devices - Full data export (JSON + Markdown) - Works offline — core features need no internet - Privacy-first: your data stays on your device SUBSCRIPTION Second Brain is free to use with daily limits. Upgrade to Pro for: - 20 memory explorations per day - Deep weekly and monthly reflection reports - Memory connection graph - Theme discovery clusters - Unlimited captures, people cards, and OCR - iCloud sync and data export Free 3-day trial available. Cancel anytime. PRIVACY Your memories are stored locally on your device. AI features use the Anthropic Claude API for processing — no other third party ever sees your data. Optional iCloud sync uses your personal Apple account. We never collect, store, or sell your information. Terms of Use: https://smartkiitos.com/secondbrain/terms/ Privacy Policy: https://smartkiitos.com/secondbrain/privacy/

Screenshots

MindMark AI4 screens
Second Brain4 screens

Verdict

The call

The clearest difference is rating: MindMark AI at 5.0 against Second Brain's 4.0. MindMark AI also leads on monetization model (free vs freemium). On price, review sentiment, ratings volume and update cadence 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. MindMark AI sells 2 in-app purchases, starting at $9.99 per month and Second Brain sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

MindMark AI holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

MindMark AI ships an update every 4 days, Second Brain weekly. The most recent releases landed on September 26, 2026 and September 24, 2026 respectively.

Scorecard2 real differences · 8 level
MindMark AI versus Second Brain: the parameters behind the verdict, then further details
ParameterMindMark AISecond Brain
PriceFreeFree
Rating5.0 (1 ratings) — better4.0 (1 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings11
Update frequencyEvery 4 days — betterWeekly
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterFreemium
DevicesiPhoneiPhone
Requires iOS18.517.0 — better
Further details — not scored
Size25 MB12 MB
Age rating4+4+
DeveloperNir PortianskyLiwei Xie

Customer experience

MindMark AI

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Second Brain

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

MindMark AI

Subscriptions2
  • MindMark Pro - Monthly7 Days trial$9.991 Month
  • MindMark Pro - Yearly7 Days trial$69.991 Year
2 purchases

Second Brain

Subscriptions2
  • Second Brain Pro3 Days trial$4.991 Month
  • Second Brain Pro7 Days trial$39.991 Year

Questions

Is MindMark AI free?
MindMark AI is free to download, with in-app purchases available.
Is Second Brain free?
Second Brain is free to download, with in-app purchases available.
Which has better reviews, MindMark AI or Second Brain?
MindMark AI is rated higher. MindMark AI averages 5.0 out of 5 from 1 ratings, while Second Brain averages 4.0 from 1 ratings.
Do MindMark AI or Second Brain have ads?
Neither MindMark AI nor Second Brain shows ads.
Which is updated more often, MindMark AI or Second Brain?
MindMark AI ships an update every 4 days, and Second Brain weekly. Most recently, MindMark AI was updated on September 26, 2026 and Second Brain on September 24, 2026.

Other comparisons