— ideas that matterYour new smart inbox. Like, really smart.
Capture everything that sparks you — any post, note, voice dump, etc.
You choose what ideas matter. AI helps you keep it useful.
iOS app coming soon. Join the waitlist for early access.
Catch the spark
- •Capture from anywhere — tweets, articles, YouTube podcasts, voice dumps, notes, etc.
- •Just spark it - send content link and you won't lose it anymore.
- •AI helps you manage ideas — every spark becomes a processed unit of interest.
Data — from passive to useful
- •Any saved content is useless until you actually review it.
- •You should be able to find it with the right context.
- •AI can help — it organizes structure, extracts insights, creates connections around each spark, suggests actionable items.
Your data stays yours
- •Zero vendor lock-in. We don't own your sparks, we help you build them.
- •spark.md — open format for exporting your data. Export/delete your data anytime.
- •Use API/MCP with your agents. Let them have access to your curated inbox.
What is a spark?
Not a bookmark, note or a link – but a unit of interest.
A spark is something that caught your attention and might deserve more attention. You can choose - invest some time, curiosity and effort into this idea, or defer it for later. It could become a hobby, a project, a skill, or just something worth remembering.
Most of the saved content rots in the graveyard of good intentions because it requires effort to be resurfaced and used. Sparks are different. Easy to capture, find and act on.
Every capture becomes structured spark.md — insights extracted, connections made, context preserved.
# Essence Swimming delivers the same cardiovascular adaptation as running — with near-zero joint load. One of the few exercises that compounds health benefits without accumulating injury debt. --- # Summary & Insights - VO2 max gains +25% - Cold water immersion triggers 300–530% norepinephrine spike — focus and mood lift lasts hours - Swimmers had 53% lower all-cause mortality vs sedentary men --- # So What? - [ ] Replace one weekly run with a 30-min swim - [ ] Try morning cold swim — track focus effect same day --- # Connections - [[cardio-training]] - [[longevity-habits]]