TheBrain vs Constella
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TheBrain
This app helps you capture, connect, and visualize all your ideas, notes, and files across devices. It acts as a digital memory, showing related items and allowing for dynamic mind mapping and powerful search to help you recall information instantly.
- Award-winning visualization
- Networked notes with backlinks
- Dynamic mind mapping
- Easy idea capture
- Cross-device sync
- Powerful search
- Visual file management
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YOUR DIGITAL MEMORY. VISUALIZED. TheBrain is the unique knowledge app that helps you capture everything — ideas, notes, web pages, files, photos — and connect it all the way you naturally think. Stop hunting through folders, tabs, and search bars. Start seeing your knowledge as a living network you can navigate with a tap. Described by the Wall Street Journal as "Software that thinks like you do" and MacLife as "the most compelling mind mapping adaptation we've encountered." Winner of KMWorld's Trendsetting Products award. WHY THEBRAIN? Traditional notes apps trap your ideas in folders, tags, or endless lists. TheBrain lets every piece of information connect to anything else — so the right idea finds you the moment you need it. It's note-taking, mind mapping, file management, and AI rolled into one beautiful experience that works the same on every device. KEY FEATURES CEREBRO — TALK TO YOUR BRAIN WITH AI Our built-in agentic AI assistant. Ask Cerebro anything — and let it create new thoughts and notes, surface exactly what you need, summarize long documents, suggest meaningful links, or just have a conversation about what you know. It can do anything you can do — only faster. DYNAMIC THOUGHT NETWORK Move beyond conventional mind maps and folders. TheBrain's animated visualization shows your ideas, their context, and the relationships between them — at any scale. Tap a thought, and the entire network reorganizes around it. NETWORKED NOTES Rich notes shown in context with automatic backlinks and concept discovery. Hybrid WYSIWYG + Markdown writing, powerful tables, resizable images, math, and folding — all the modern editor essentials. EVERYTHING IN ONE PLACE Attach web pages, PDFs, photos, and documents to any thought. Link people, projects, files, and ideas in a single living workspace. POWERFUL SEARCH Find any note, file, web page, or idea in seconds. Every match appears in the context of your thought network, so you instantly see how it relates to everything else you know. SEAMLESS SYNC ACROSS DEVICES Your brain is always with you. Mobile, Mac, Windows, Linux, and web stay in sync — even with large brains. Smart Sync downloads attachments on demand, keeping your brain fast and lightweight on every device. INFINITE SCALE Effortlessly handles hundreds of thousands of items and many gigabytes of data — without slowing down. COLLABORATE AND SHARE Publish your brain online for the world, or sync thoughts privately with your team. Great for shared knowledge bases, project planning, and team research. ==================================== WAYS TO USE THEBRAIN • Build your second brain — a living reflection of how you think, ready when you need it. • Manage everything in your life: projects, people, goals, files, and ideas in one place. • Capture interesting articles, videos, and references so they're activated when you need them. • Organize trips, travel, and major life events with all the right context at hand. • Power your research — go deeper on any concept and see how it connects to everything else. • Turn goals into action by linking them with the resources needed to achieve them. • Build a knowledge base that sparks new ideas and breakthroughs. • Link people, projects, and information for a smarter view of your business. • Create topic brains around your passions, hobbies, and special interests. • Plan personal projects like home renovations, weddings, or major purchases. GET STARTED IN MINUTES Start with a single thought — your name, a project, an idea you want to explore. Add a few connections. Within minutes you'll understand why people have trusted TheBrain for over two decades. For the best experience, install TheBrain on your phone, tablet, and computer. Our iPhone, iPad, Mac, Windows, and other mobile clients all sync seamlessly — your best thinking is always with you.
Constella
Capture thoughts, synthesize ideas, and automate workflows in one place. This AI-powered tool connects notes, emails, and tasks to surface insights and allows for instant semantic search. It adapts to various thinking styles, making it ideal for professionals and creatives.
- Instant thought capture with text and images
- AI synthesis across notes, emails, and apps
- Semantic instant search
- Smart automations and task delegation
- Sync across devices
- Integrates with Notion, Google Drive
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Losing thoughts suck but organizing is painful, so we made the fastest way to capture and recall them without Instant Thought Capture: Jot down ideas the moment they strike. Quick-capture notes, links, and images from anywhere on your phone. Never forget a fleeting thought again. Thanks to AI indexing, you don't have to fumble with files and folders when organizing them. AI-Powered Synthesis Constella connects your notes, emails, newsletters, and tasks to surface insights you would have missed. Your personal AI understands context and finds relationships between your thoughts automatically. Smart Instant Search Find anything in seconds with AI-powered semantic search. No need to remember exact words or which folder you saved something in — just describe what you are looking for. Built for Those with Lots of Thoughts Key Features - Quick thought capture with text and images - AI synthesis across notes, emails, and apps - Semantic instant search across all your content - Smart automations and task delegation - Redesigned dashboard for faster navigation - Sync across devices with the desktop and web app - Integrates with Notion, Google Drive, and more - 475M+ research papers searchable Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.constella.app/legal/privacy-policy
Screenshots
Verdict
TheBrain and Constella both sit at 4.8 stars, but that hides the real split: 88% of Constella's written reviews are positive against 44% of TheBrain's. TheBrain's advantage is ratings volume (172 vs 10). On price, rating, update cadence and ads 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. TheBrain sells 2 in-app purchases, starting at $17.99 per month and Constella sells 6 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.8 for TheBrain against 4.8 for Constella. That said, the two scores are not equally well evidenced: TheBrain has 172 ratings behind it against 10, so its average is the more settled of the two. Written reviews are what separate them: 44% of TheBrain's written reviews are positive against 88% of Constella's.
TheBrain ships an update fortnightly, Constella every 10 days. The most recent releases landed on October 29, 2026 and October 8, 2026 respectively.
| Parameter | TheBrain | Constella |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (172 ratings) | 4.8 (10 ratings) |
| Positive reviews | 44.3% of reviews | 87.5% of reviews — better |
| Number of ratings | 172 — better | 10 |
| Update frequency | Fortnightly | Every 10 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 254 MB | 89 MB |
| Age rating | 4+ | 4+ |
| Developer | TheBrain Technologies LP | Nora Studios |
Customer experience
TheBrain
Constella
Bugs and requests
TheBrain
Reported bugs
5 issues- Crashes on iOS 9
- Inability to open brains
- Freezing after each action
- Login and account issues
- Sync problems
Requested features
7 requests- Offline mode
- Improved mobile UI and UX
- Better integration with other apps
- More affordable pricing options
- Enhanced search and filtering
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- Split-screen support on iPad
- Handwriting and stylus support
Constella
Not enough reviews yet to summarise bugs or requests.
In-app purchases
TheBrain
- TheBrain Pro Monthly$17.991 Month
- TheBrain Pro Annual$189.991 Year
Constella
- Base7 Days trial$7.991 Month
- Ultra7 Days trial$19.991 Month
- Base Yearly7 Days trial$71.991 Year
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- Ultra Yearly7 Days trial$179.991 Year
- Stella Call Credits - Small$2.99
- Stella Call Credits - Big$5.99








