ADHDThe $0 Second Brain (and What the Paid Ones Charge)
You do not need to pay anyone to build a second brain that talks to you, sorts your thoughts, and helps you take the next tiny step. You can build the whole thing for zero dollars right now with Obsidian and a free AI chat app. That's the whole point of this post. Everything after this paragraph is just the receipts.
What the paid note apps actually charge, July 2026
We pulled these straight off the vendor pricing pages in July 2026, because ADHD brains get burned by "starting at" language more than most, and the fine print matters. Prices change, so treat this as a snapshot, not a promise.
Notion AI is bundled into the Business plan, which runs $20 a month if you pay for the year up front, or $24 a month if you pay month to month. You cannot get the full AI features on a cheaper plan. Mem has a free tier with 25 AI messages a month, then a Pro plan at $12 a month, then a Proactive agent tier at $99 a month for the version that acts on your notes without being asked. Reflect charges $10 a month billed annually and has no free tier at all, you're in or you're out. Tana gives you 50 free AI queries a month, then Pro runs $20 to $30 a month depending on the plan you land on. Obsidian, the app the Yap Method is built to work alongside, is free for personal use. Full stop, no tier, no message cap, no credit card.
Monthly price for AI note-taking, per app
US dollars, cheapest plan with real AI features
Only one of these apps even says the word ADHD
We looked at every one of these pricing and marketing pages for a mention of ADHD or neurodivergence, the pros and the cons. Mem is the only one that mentions it at all, and that mention is a single customer testimonial. Nobody built a feature, a mode, or a design choice around an ADHD brain. Notion, Reflect, and Tana skip the topic completely. That doesn't make them bad tools. It means none of them were built for you specifically, and you're paying full price to bend a general-purpose app around a brain it wasn't designed for.
You pay the same price as everyone else for a tool that never had you in mind.
What you're actually paying for once you get past the free tier
Look at what triggers the jump from free to paid on every one of these apps. The paywall almost always sits at a message cap, a query cap, or an agent that acts on your notes without being asked, not at the note-taking itself. Mem's free tier caps at 25 AI messages a month, then charges $12 to remove the cap. Tana gives you 50 free queries, then charges to lift the ceiling. Notion doesn't meter usage, it gates the entire feature behind its priciest business plan. Reflect skips the free tier altogether and just charges from day one.
None of that is a scam. Running AI costs the company money, and a cap is a reasonable way to manage that. But it means the $10 to $30 a month you'd spend isn't buying you ADHD support. It's buying you more messages, more queries, or an agent tier you may never use. If a free tier or a free AI chat app already gets your thought out of your head and into a pile you can act on, you have already gotten the thing that actually matters.
Start at zero, upgrade only when you hit a real wall
Here's the actual plan. Open Obsidian, it's free, it's the app the Yap Method already points you to. Pair it with the free tier of any big AI chat app — the paid tiers ($20-ish a month) are optional, not required. The free tier does everything you need for sorting a messy brain dump into Tasks, Worries, Ideas, Feelings, and Questions. That's the whole MAP step. You don't need Notion's Business plan or Mem's Proactive agent to do it. You need a place to talk and something that listens back.
The wall you're waiting for is a specific one, not a vague "I should probably upgrade" feeling. Maybe you hit a real message cap every single week and it's slowing you down. Maybe you need an agent that acts on your notes without you opening the app. That's a real wall, and that's the moment a $10 or $12 plan earns its keep. Until that wall shows up, upgrading is just spending money to feel like you're taking your ADHD seriously. You take it seriously by yapping the thought out and tapping one small action done. That part is free, and it always has been.
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