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Ask HN: What are you working on? (September 2025)

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Re: Ask HN: What are you working on? (September 2025)

#801
post #67

I've been working on a 3D voxel-based game engine for like 10 years in my spare time. The most recent big job has been to port the world gen and editor to the GPU, which has had some pretty cute knock-on effects. The most interesting is you can hot-reload the world gen shaders and out pop your changes on the screen, like a voxel version of shadertoy. https://github.com/scallyw4g/bonsai I also wrote a metaprogramming…

Looks so good!

Re: Ask HN: What are you working on? (September 2025)

#802
post #10

Currently a one-man side project: https://laboratory.love Last year PlasticList discovered that 86% of food products they tested contain plastic chemicals—including 100% of baby food tested. The EU just lowered their "safe" BPA limit by 20,000x. Meanwhile, the FDA allows levels 100x higher than what Europe considers safe. This seemed like a solvable problem. Laboratory.love lets you crowdfund independent testing of s…

Wow, great idea, simple website and hopefully a positive impact, not often you see all three in one project :) Good job! I'm guessing it's limited to US products and US labs? Would love something similar in Europe and/or EU, but it isn't clear if you're limited to US/North America right now, would be nice if it was a bit clearer up front :)

Anybody unemployed that would like to try doing this for EU? With the author's green light (or even collaboration)

Re: Ask HN: What are you working on? (September 2025)

#803
I'm working on a python library that allows you to put data on GPU as fast as your network/storage allows you to at the hardware limits. No more clunky DataLoaders that are too slow and have inconsistent perf. I achieved stable throughput numbers >8GiB/s (so saturating my PC's nvme SSD), going to test on networked scenarios soon. Works for any python ML library (torch, tensorflow, jax, etc.), both for training/inference, single/multi GPUs on one node (shared/separate queues for DDP), multiple sources of data, seamless transition between training/validation phase (no significant perf drop), arbitrary shape of tensors and lots of data configurations.

Planning to add (de)compression and on-the-fly data augmentations and releasing it to public.

Re: Ask HN: What are you working on? (September 2025)

#804

I’ve been suffering from migraines for the past year and the health system hasn’t been too helpful in diagnosing why. I’ve got some meds, but they’re expensive and not without side effects. So I’m building an app to try and figure out how to avoid the triggers in the first place. https://dotsjournal.app Sort of like a digital bullet journal. You setup some rows of events you want to track, then just tap for when/if t…

> some rows of events you want to track Neat. I also created a grid for habit tracking (for chronic pain mgmt). Day of month across the top, all the things I'm supposed to do along the side. Something to share and discuss with my care providers. Mine's just a spreadsheet that I tweak and print every month. (Then added to my discbound clipboard organizer, that I bring everywhere.) I haven't had the gumption to digitiz…

That’s precisely how I started too! But opening the spreadsheet on my phone to try and log something got to be tedious. Especially while actively having a migraine. I figured an app could ease the difficulty a lot.

I appreciate your interest!

Re: Ask HN: What are you working on? (September 2025)

#805

I’ve been suffering from migraines for the past year and the health system hasn’t been too helpful in diagnosing why. I’ve got some meds, but they’re expensive and not without side effects. So I’m building an app to try and figure out how to avoid the triggers in the first place. https://dotsjournal.app Sort of like a digital bullet journal. You setup some rows of events you want to track, then just tap for when/if t…

Best of luck and wish I had something like this a while back. Took me 4 years to figure out my triggers and one of them was pure luck.

Oof, 4 years living with that, I’m so sorry! It’s been so frustrating not knowing when/if I’ll have one, regaining some amount of control eases the pain a bit.

Re: Ask HN: What are you working on? (September 2025)

#807

I built a fantasy football rankings app using claude code, and it has been blowing up in the fantasy football subreddit. Funny enough, it's forcing Yahoo to change their site and improve their layout which ruined all my automation. Surprised how much traffic it's receiving every week just for a better layout. https://boonerankings.com/

How is it deciding rankings? Is this like a mix of points/projections?

Re: Ask HN: What are you working on? (September 2025)

#808
I'm working on something completely different, especially for me. After 9 years as a CTO I'm moving on to coach other tech leaders. I just noticed that I didn't like the doing anymore and I'd much rather work with people for people. My biggest takeaway is that the hardest part of building anything is the human side. Emotional baggage, limiting beliefs, social dynamics. All the startups I was part of didn't take off mostly because of this. Pretty interesting to see how our automatic actions driven by unidentified beliefs drive everything we feel, think, and do. So I guess I'm moving into hacking on humans now for a living. Feels exciting.

I'm still very early in building the website but you can say hi or read more about my approach or story here: https://trueselfcto.com/ I'm always open to chat about just anything, so please feel free to share your thoughts or say hi!

Re: Ask HN: What are you working on? (September 2025)

#809
post #764

Kanji Palace - https://kanjipalace.com I'm building an app to help people memorize Kanji by turning the characters into vivid, memorable images with accompanying mnemonic stories. I think AI image and video models have reached a point where they can offer a completely new approach to language learning. Next, I'm planning to add features that use AI to generate comic strips (using Seedream or Nano Banana), songs (usin…

Landing page needs way more quality examples. There's one shown in the video (and which appears for 1 second after waiting 5 seconds for it to be generated) and 3 static ones below (two out of which don't really correspond to the text menmonic below the image).

Thanks for your feedback!

Re: Ask HN: What are you working on? (September 2025)

#810

Non tech, but I started a sports beverage company with my brother and a neighbor. We are based in South Florida. My brother and I grew up playing sports and remember the simplicity of home-made drinks we'd take to games that blew the likes of Gatorade out of the park. We aim to replicate the simplicity of home-made drinks with simple ingredients. https://www.drinkiso.com/ Our whole value-add is based around the fact…

I can't find the nutrition information anywhere on the site. The first thing I look for when I see "no sugar added" on any product is the sugar content. Not being able to see that before buying is a no-go for me.

Great point! I will add it to our site.

In terms of our sugar content, is 16g sugar and 17g sugar, respectively. (2 of our flavors are 17g, one is 16g).

In terms of "no sugar added", it's true, we don't add sugar. But we have natural sugars involved - our drinks are made with real fruit which obviously contains sugars. But we don't add stevia, fructose, or anything like that.

Part of hydrating effectively is adding sugar to your bloodstream as well as salts, etc.. in the right balance in addition to water / liquid.

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