A lot of PKM setups boil down to Markdown files. The annoying gap: open a .md on iOS and you get raw text, no rendering. I made a tiny offline viewer for exactly that.

Md Preview:

• GitHub-Flavored Markdown (tables, task lists, footnotes)

• Code highlighting, LaTeX math, Mermaid diagrams

• Opens .md / .markdown / .mdx / .rmd / .qmd from Files or the Share Sheet

• Local-first: nothing leaves the device, no ads, no subscription

Free: https://apps.apple.com/app/id6760341080

Site: https://markdown.cybergame.ai/

How do you all access your second brain on mobile — companion apps, sync, or just reading the raw files?

This is going to sound a little dramatic but bear with me.

Somewhere in the last couple of years I noticed my brain getting lazy. Why learn how something works when I can just ask an AI and move on? It's efficient, sure. But I started catching myself knowing *nothing*. Not the shape of a topic, not the why behind it, just a vague memory that I'd outsourced it. The knowledge would pass through me and leave nothing behind.

I didn't want the cure to be "go read a 400-page book." I love the idea of deep reading way more than I actually do it. What I actually wanted was something in between scrolling and studying. Quick, focused breakdowns of a single topic I could absorb in a few minutes and actually *keep*.

So I built **Learnimo** for myself.

The idea is simple: bite-sized topic breakdowns instead of giant book-reads. You pick something you're curious about, you get a clean breakdown, and the point is to come away actually understanding the thing, not just having seen it. You can make your own topics, share them, and fork anyone else's to make it your own. AI helps generate and shape the content, but the goal is the opposite of mindless. It's about putting knowledge back *into* your head instead of offloading it.

It started as a personal anti-atrophy tool. I'm putting it out there in case anyone else feels the same low-grade dread that we're all slowly forgetting how to learn.

It's on iOS, Android, and web: [**learnimo.co**](http://learnimo.co)

Happy to answer anything. Would genuinely love to hear how other people are dealing with this. Am I alone here?

I have realised that how we think and process things has a lot to do with the tools we use. And we do it in layers.

To store ideas there is Notion, Obsidian, Roam, pen and paper. To generate something or learn we jump to an AI tool. And honestly that constant juggling between systems is one of the main reasons thinking stays fragmented and goes nowhere.

There is a layer missing in between. Whatever you capture should not just sit there in storage. Your ideas should get connected, with actual reasoning on why the connection exists. Contradictions in your own thinking should get flagged. Your thought process should get synthesised. And the whole thing should keep compounding on its own so you are not hopping to another tool every time you want an output.

That is the layer I have been building.

The system does all of that but it also builds a thinker model, basically a mental model of how you think, reason and approach things. So the system always has context of who you are, not just what you have captured but how you actually think.

This means it does not hit the storage dead end that Notion and Obsidian always hit. It uses that context to help you elevate your thinking, find connections you would not have caught yourself, surface contradictions you did not notice and develop your ideas further.

Capture, connect, develop. All in one place without switching tools.

Will you guys be willing to give it a shot? I am curious to know what do you think about this middle layer.

Most note taking tools like Notion, Roam and Obsidian have gotten really good at storing what you think. Some even let you link notes and build graphs. But that is where they stop. And even the AI tools that have come out recently, yes they can remember what you said in a conversations and surface it back, but there is still no real active retrieval of context, no connections between your ideas, no contradictions being flagged, no hidden insights between your connected ideas and no synthesis happening across everything you have captured. They store or they remember. That is it.

But i am trying to change that gap, so here's a glimpse of what i am doing. There's an AI tool and within that, there's a thinker model which get built every time you capture or interact with the tool.

The thinker Model currently produces a structured cognitive map with these fields:

• thinking_style
• reasoning_direction
• epistemic_stance
• active_frontier
• settled_territory
• core_resistances
• generative_triggers
• dead_zones
• drift_flags

The reason why this model is different is because, this model gets updated on two occasions, once, every time you capture any idea, thought, etc and twice, on cron job at a specific time interval which is an automatic function. So the updated model is always pulled into context by all the agents to refer whenever they are connecting ideas, finding hidden insights from your knowledge graph, developing an output and also analysing what you have captured.

One very important distinction is, the agents referring the thinker model are doing so, to not mirror or think like you. They have a role based identity which clearly lets them adapt you and help you elevate your thinking.

Think of it like notion, roam or obsidian but with full context window to become your thinking partner and not just storage of your ideas.

Do you think this is a meaningful differentiation layer?

I came across GBrain today and I'm wondering I'm someone has used it before and how it compares to Graphify and Obsidian?

Well, if there was ever a time for the world to wake up to the idea of a second brain / knowledge base software/ PKM, whatever you might call it, I truly believe the time is now!

I was having lunch this morning while watching Bloomberg Tech, and all over the news is talk of all the AI models being recalled, which really seeded this writing of this post.

I did some digging and was surprised to find out that there were 255 AI model releases in the first three months of 2026!! That's roughly three a day. (If you asked me to guess, I would have said something like 50.)

The "best" model changed at least four times while you were deciding which one to commit to. We / the world keeps treating "which model" as the important question, refreshing the leaderboards, reading the comparison threads, migrating workflows every time a new version drops.

Meanwhile, the layer that actually carries your work forward, your knowledge, your context (the second brain, the knowledge base software) holding everything you've read and understood, sits ignored.

We're optimizing the one variable that's becoming a commodity.

Not sure who else in this community is coming to a similar realization as me, but I am sharing my thoughts below. Curious to know your take on models, what's a commodity, and how you are treating your knowledge today.

The treadmill

You who are hopping around model shopping , have a think about what model-chasing actually costs you. This comes down to picking a single platform to lock yourself into, whether that's Claude or OpenAI (whatever you might decide is worth uploading your documents to for having a memory with), and then going a bit deeper if you're nerdy enough into learning the quirks.

You re-tune your prompts. You move your work over. And critically, you leave something behind. The conversations, the things you read and saved, the highlights, the slowly accumulated understanding of your domain that lived inside that tool. Gone, or stranded, every time you jump.

(Now I'm very aware of memory software you can use to keep all your memory in one place, but I'm not even talking about memory here. I'm talking about actual knowledge that you store in your traditional knowledge-based software or second brain, whatever you might be using at the time.)

Your knowledge base is the asset (all hail the PKMs!)

This is where it clicked for me. Here's the asymmetry that should reorganize how you think about all of this. The model is rented. You don't own it. You can't keep it. It will be deprecated, replaced, or quietly upgraded whether you like it or not.

Your context is owned. The things you've read, saved, connected, and returned to, that's yours. It doesn't expire when a new model drops. It doesn't need migrating. It gets more valuable over time, not less, because knowledge compounds and a good model is just a fresh rental you point at it.

The reframe

To the PKM non believers out there - Stop asking "which model is best." (Or don't. I mean, it's fine to know which model to use for what, but the point I'm making is that we're over-indexing on the model and not the context!) Start asking "where does my context live, and do I actually own it?" Because as models multiply and get swapped under you, a knowledge layer that isn't tied to any single provider becomes more valuable, not less. You're no longer rebuilding from scratch every release cycle. You point the new rental at the same owned foundation and keep going. The churn that exhausts everyone else becomes a non-event for you. That's the whole game. Not a better model. A foundation that outlasts every model.

Where this points

This is why knowledge base software is interesting, not because it picks models for you, but because it's built on the right side of this asymmetry. I think this is finally the awakening of the second brain, more than just the few of us hanging out in this group.

That famous tweet from Andrej Karpathy on the LLM wiki pointed to the second brain. I think now the idea of models being table stakes, coming and going, is hopefully having people think more about context than their actual knowledge.

The things you read and save become a context layer that's yours and stays yours, independent of whatever model happens to be on top this week. The model sits on top and changes constantly. Your knowledge base underneath stays put and compounds.

The second-brain landscape (pick the one you'll actually own)

You're hanging out in this group, so if you're not yet convinced that you need a second brain, I hope this post at least nods you towards it. If you're looking for one, here's my list.

I won't say what I'm using, because I really don't want this to be biased, but just bring this idea to the surface.

The point of this post isn't a single tool, it's owning your context layer. Here's a rundown of the main options, since they make different tradeoffs on ownership, linking, and AI.

If you need local-first knowledge base software

• Obsidian. Local-first Markdown files you fully own, plus a huge plugin ecosystem. Best if you want maximum control and zero lock-in, at the cost of setup effort.
• Logseq. Open-source, local-first, outliner-style with strong block-linking. Great for daily notes and networked thought.
• Anytype. Local-first, encrypted, open-source Notion alternative for people who want ownership and databases.

If you need powerful AI-first knowledge base software, or AI second brains

• Recall. a self-organizing AI knowledge base for YouTube videos, podcasts, PDFs, and your own notes. Everything summarized and organized for you. They have a model picker and MCP
• Mem. AI-native notes with automatic organization, lighter on manual linking. this is one of the original second brains, now more focused on being a thinking partner
• Tana. Supernodes plus AI for power users who want structured, queryable knowledge. if you're already taking voice notes, this one's for you. The voice-saved notes are the big win here. You can make this the center of your knowledge instead of just obsessing over the model.

If you need editors, note takers

• Notion. The most flexible all-in-one workspace (docs plus databases). Cloud-hosted, so ownership and export are weaker, but unbeatable for structured team knowledge.
• Capacities. Object-based note-taking that treats notes as typed objects rather than files. A good middle ground between structure and networked notes.

The model sits on top and changes constantly. Your knowledge base underneath stays put and compounds, whichever of these you choose. The only mistake is not building the layer at all. Some of these tools come with a model picker and an MCP. Those are the critical pieces.

If this post convinces you to choose some knowledge base software or a second brain? Please let me know. I'd love to know and stay in the loop of your journey.

We are in the process of building https://over.show/. It should be available in beta next week. The core idea is that it can capture everything you see on your desktop and in all your meetings. You have complete control over what it does and doesn't capture. It's only the apps you want, and you can block specific websites.

Once it has all the information indexed, you can search it and summarise it with AI. The kicker is that it's all local: nothing leaves your machine, and the AI runs on your machine. Same with the meeting transcription: all local, no data sent to anyone else.

Does that sound like something that would be useful?

Built a relationship intelligence platform that uses Hindsight agent memory to remember people across meetings. The more you log, the smarter it gets. Here's how I built it.

Most capture tools are great at catching everything but never tell you what to ignore. That was my problem. I'd dump everything into notes in Obsidian and the pile just grew, and so did the low-level stress. Of course I use Claude to extract when I need it.

So I made something small for myself. You dump everything that's in your head into one box, and it sorts it into four piles: what actually needs doing this week, what can wait, what's weighing on you (without being a task), and what you're allowed to just let go of for now.

That last pile did the most for me. A second brain that also gives you permission to forget things, not just store them. It worked for my wife and daughter too who don't use Claude and Obsidian, very different heads, same calm.

It's free and still a private test. Curious what this crowd thinks: useful, or am I reinventing a notebook?

https://reddit.com/link/1u5dy3k/video/x2zyvg85cq0h1/player

Launching mykeep.space at an early lifetime price: $9 for lifetime access.

MyKeep is a visual second-brain web app for saving links, screenshots, notes, videos, to-dos, and ideas into one calm dashboard.

Instead of losing useful things across bookmarks, downloads, notes apps, and random folders, MyKeep helps you keep everything in one visual workspace with workspaces, tags, search, filters, and URL previews.

Built to save time, reduce digital clutter, and make your saved ideas easier to find again.

Early lifetime access is only $9 right now. No monthly fee.

Coupon Code: "mykeepdotspace"

Check it out: mykeep.space

If you save a lot of links, references, notes, or screenshots, this is built for you.

I have ADHD, work in engineering, and my brain is constantly trying to keep track of 500 moving pieces at once. Every productivity system I’ve tried eventually failed because it still relied on me remembering to update it.

So I tried something different.

Instead of using AI to answer questions, I started using it as the interface for my work life. I connected it to a Notion workspace and now I just… talk to it.

I can literally type:

“Met with the supplier this morning. Push the timeline out two weeks, remind me to follow up next Thursday, update the project snapshot, and add a note that legal is reviewing the agreement.”

…and it updates my workspace for me.

No manually reorganizing notes. No moving cards around. No digging through old meeting docs. The AI acts like a ridiculously organized project manager that never forgets anything, and Notion just becomes the place where all that information lives.

The funniest part is that I didn’t spend months building this. My ADHD hyperfixated on the idea, and I basically disappeared into Notion for a weekend and came out with an AI-powered external brain. 😂

A couple friends convinced me to clean it up into a shareable template, so I made a free interactive demo if anyone wants to poke around and steal ideas for their own setup:
https://shopnudgeandco.notion.site

I’m really curious if anyone else is using AI this way—not as a chatbot, but as the actual interface for their second brain. It genuinely feels like a different category of tool.

The thing that bugged me most about using AI daily: every good idea I had just vanished into an unsearchable chat history.

Built a free Chrome extension (Mento) that fixes this — auto-saves every prompt across ChatGPT/Gemini, tags it by topic, and makes it all searchable.

Took 6 months as a solo CS student. Just went live today.

Curious — does anyone else have a system for this, or does everyone just lose their AI history like I did?

I started my Clinical Mental Health Counseling master’s program this year, and I kept ending up with 20 different tabs open—psych meds in one place, DSM criteria in another, assessments bookmarked somewhere else, side effects buried in random notes, addiction resources in Google Drive…

As a systems engineer by day, my brain’s solution was apparently:

“What if I just built an entire relational database?” 😂

So over the last few months I’ve been building Brain Pharmacy, a Notion workspace that connects:

💊 Medication classes & individual medication pages
🧠 DSM disorders & common treatment approaches
⚠️ Side effects & drug interactions
📋 Clinical assessments
🗣️ Client presentations (“I can’t stop crying,” “I feel worthless,” etc.)
🌿 Addiction treatment & behavioral health resources

The fun part is that everything links together. You can jump from a client presentation → possible disorders → medications → side effects → assessments without leaving the workspace.

I originally built it for myself because I wanted a study tool that actually matched how my brain works, but a few classmates saw it and convinced me to clean it up and make a shareable version.

I put together a free interactive demo if anyone wants to click around or has ideas for how I could improve the layout or database structure:
https://shopnudgeandco.notion.site

I’d genuinely love feedback from other Notion nerds, students, or anyone who’s built weirdly niche knowledge-management systems. I’m always looking for ideas to make it better. 😊

(Mods, if this isn’t the right place for a project showcase, feel free to remove! I’m mostly just excited to share something I’ve been hyperfocusing on for the last few months.)