MindMark AI vs Second Brain
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
Read full descriptionHide 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
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.
- 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)
Read full descriptionHide full description
Most notes get written once and never read again. Second Brain reads them for you. Write a line whenever something is on your mind, and once a week it tells you what your week was really about. You don't need to keep a diary or a streak. One line a day is enough. YOUR WEEK, READ BACK TO YOU The weekly insight covers what took up your attention, what changed since last week, and one concrete thing to try. Every insight shows the notes it came from, so you can check it against what you actually wrote. Your first weekly insight is free. Once a month you get a longer read on where the month went. After your first five notes there's also a first impression of you, and it fills in as you keep writing. CAPTURE Type, or press and hold to speak. Share text, links or images from other apps, or pick screenshots and the text in them is read on your phone. Each note gets a title and tags automatically, so there's nothing to file. ASK YOUR PAST Explore searches by meaning, not only keywords. Ask "What did I decide about the move?" or "What did Anna say last time?" and get an answer built from your own notes. PEOPLE Keep a card for the people in your life: what they said, what you did together, what to bring up next time. Before you meet someone, a reminder shows your open to-dos and what you talked about last time. REMINDERS AND WIDGETS Write "dentist next Friday at 3pm" and it becomes a reminder and a checklist item. There are widgets for the Home Screen and Lock Screen, and the checklist can run as a Live Activity. PRIVACY Your notes are stored on your device. There's no account to create and no server of mine in between. To title, tag and reflect on your notes, their text is sent to a cloud AI service. If your iPhone supports Apple Intelligence, you can turn on On-Device AI and new notes are handled on the phone instead; Explore and reflections still use the cloud. Every AI result is labeled "On device" or "Cloud AI", so you can see which is which. iCloud sync is optional and uses your own iCloud account. You can export everything as JSON or Markdown at any time, for free. FREE AND PRO Free: 5 notes a day, daily reflections, your first weekly insight, and export. Pro: unlimited notes, weekly insights and monthly reads, 20 Explore questions a day, up to 30 screenshot imports a day, unlimited people, the memory graph and life themes, iCloud sync, and the Rainbow Aurora theme. Pro is a monthly or yearly subscription. The yearly plan comes with a 7-day free trial, the monthly plan with 3 days. Payment is charged to your Apple ID and renews automatically unless cancelled at least 24 hours before the end of the current period. You can manage or cancel it in your App Store account settings. Second Brain is made by one person, Lemon. Terms of Use: https://smartkiitos.com/secondbrain/terms/ Privacy Policy: https://smartkiitos.com/secondbrain/privacy/
Screenshots
Verdict
The clearest difference is rating: MindMark AI at 5.0 against Second Brain's 4.5. 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
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.
MindMark AI holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
MindMark AI ships an update every 4 days, Second Brain every 9 days. The most recent releases landed on October 12, 2026 and October 10, 2026 respectively.
| Parameter | MindMark AI | Second Brain |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.5 (2 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 1 | 2 — better |
| Update frequency | Every 4 days — better | Every 9 days |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone | iPhone |
| Requires iOS | 18.5 | 17.0 — better |
| Further details — not scored | ||
| Size | 27 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Nir Portiansky | Liwei Xie |
Customer experience
MindMark AI
Second Brain
In-app purchases
MindMark AI
- MindMark Pro - Monthly7 Days trial$9.991 Month
- MindMark Pro - Yearly7 Days trial$69.991 Year
Second Brain
- Second Brain Pro3 Days trial$4.991 Month
- Second Brain Pro7 Days trial$39.991 Year








