Ask HN: What are you working on? (September 2026)

This is really awesome! I used to have an movement to tissue mapping in an earlier version of app but I opted to focus more on the weight-reps curve it because the tissue volume calculations added too much complexity to the interface, and it just encouraged me to do too many different movements. So exercise selection and tissue coverage is something I actually think about outside my app.

I had coefficients mapping each exercise to its tissue impact but it was kind of arbitrary and unscientific - even between athletes you will have different techniques on the same movement that will impact tissues differently. I do think that workout design is a super important area and I hope you crack it, it was too hard for me to do a good job on.

I'm spreading my bets a lot lately, trying a bunch of stuff:

https://modelrigs.com - a website for running open weights models on various hardware setups, including benchmarks, how to run them, and a TCO economics analysis

https://riverfish.uk - this one's a bit different! It's basically a pSEO experiment in combining fish population surveys and river data across England

https://findclients.org - a B2B client prospecting database of UK companies across different cities and industries, with a market analysis of the different sizes and ages of companies

https://octoloops.com - AI growth app. I've downgraded my time on this as although I could get users to sign up, getting them to actually use the app hasn't worked out at all; new users won't reply to my nice founder emails either. Bit of a bummer because I invested quite a lot of effort but it just doesn't seem to be working. Ironically I still use it to dogfood on my own projects...

https://signalbump.com - another experiment: enrich people's projects in monday.com with data on new (capital) projects and expansions of their clients. It's a monday.com app, the marketplace submission process was very challenging as a solopreneur. We'll see, very early days.

Nothing to special, but I made a workout tracker that allows me to only log a standard, scored workout.

This solves exactly n=1 user's issues: I tend to fall off the workout wagon without public accountability and when I dont get scores to improve on and especially to degrade and dillute my gym trips to the point of ennui.

It's free and public until it breaks:

https://aft.jodavaho.io

My progress

https://aft.jodavaho.io/track/46B8XWPCVK5MVS35R8X53Y8KY5

(heavily helpd by AI on the frontend - I am terrible at it)

I built https://kadaster.club, which shows all land parcel data of the Netherlands. There's some existing sites for this but they quickly try to upsell you stuff and/or are slow and don't show the parcel data when zoomed out too much. None of the other ones I've seen render the parcel data as vectors either, which hurts my eyes.

I also just added https://kadaster.club/mcp so an agent can query the same data and even look in the data available on https://omgevingswet.overheid.nl/ to answer question around what is allowed and what permits you need for a specific location

yeah, point taken, I do need to rewrite the user-facing documentation to be more accessible (and less obviously LLM-assisted, heh - although I did review and edit all of it). Workout design (including teaching a user how to do an exercise) and logging are two legitimately different tasks in a workout app and I wanted to focus on being the best logger. Maybe this is paranoid but I felt that saying "here's how you do a workout" introduced a little more potential liability than punting to "if you don't know how to setup a workout and learn to do the movements, hire a personal trainer to help you figure out movements appropriate for your fitness level."