I play sanctioned disc golf, which means I care about improvement in a measurable way. For a while I was tracking my putting practice in a Google Sheet, distances, makes, misses, percentages, because I needed to know whether the work I was putting in was actually moving the needle. The spreadsheet worked. It also stopped being enough.
SlingingTheD started as a replacement for that sheet and turned into something considerably larger.
What It Is
The app has four modules. Putting Practice is the original reason the thing exists: log a practice session by distance, get your make percentage back, track it over time. It sounds simple because it is simple. That is the point. I needed a clean record of whether I can make putts from 20 feet at the same rate I could six months ago, and now I have one.
Disc Caddy is an inventory of every disc in the bag. Not a novelty feature. If you play enough disc golf you end up with a lot of plastic and you stop remembering exactly which run of which mold flies a certain way. Having a reference that lives in your phone is more useful than it sounds.
Course Caddy is where the project got interesting. It is a hole-mapping tool, but the way it works is the thing worth talking about. I built a design language from scratch, a visual iconography system for describing a hole. Dogleg left, uphill, headwind corridor, mandatory obstacle at 200 feet. These things exist on every disc golf course and there has never been a clean, standardized way to notate them. Course Caddy is my answer to that. You go to a course, map each hole using the icon set, and come back the next round with a reference that tells you what you are walking into. It is entirely my own design system, built because nothing like it existed.
The Analysis module is a link to the sister site, thesearetheholesiknow.com, which does the round-data work that SlingingTheD deliberately does not try to do.
Why They Are Two Sites
I made a deliberate choice to keep competitive-round analysis separate from practice tracking. SlingingTheD is about what happens during your practice sessions, specifically putting practice and course prep. TaTHiK is about what happens in your scored rounds, which come from a UDisc CSV export. Keeping the two tools distinct means each one has a clear job. Combining them would have made both worse.
The Analysis tab in SlingingTheD is a door. It passes you to the tool that actually does that work rather than half-building the same thing in two places.
Where It Stands
The app is live and has five users, including me. That is not a number I am trying to scale right now. This was built to solve my problem first, and the other four users are people I play with who have the same problem. The code is stable. The modules work. The design is clean and data-forward with no decoration for its own sake.
What is missing is some of the infrastructure work: email is not set up, a few checklist items around SEO and monitoring remain undone. None of that affects the app itself. It affects whether I am serious about growing it beyond the five people who already use it, which is a question I have not answered yet.
What Comes Next
The Course Caddy design language is the part of this project I find most interesting from a product standpoint. Nobody has built a standardized notation system for disc golf holes. I did it because I needed it, and the result is something that could genuinely be useful to a much larger audience. Whether it goes anywhere depends on whether I want to invest in the growth work, which means SEO, outreach to the disc golf community, and turning a personal tool into a public one.
For now it does what I built it to do. That is not nothing.