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Posted by david927 3/30/2025

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

What are you working on? Any new ideas that you're thinking about?
390 points | 996 commentspage 31
kmatthews812 4/4/2025|
Paid In Bio https://www.paidinbio.com

HN is probably not the target audience for this, but I've become really obsessed about solving my own problem of building apps, but struggling to market them. There are very few places online that welcome you to post links, enable you to post a link quickly, and drive targeted traffic at reasonable cost.

So I'm trying to bootstrap a new ad network on Link In Bio platforms that offers this trifecta (welcoming, quick, cost effective).

jordanmorgan10 3/31/2025||
A basketball shot chart. I’m about done with it, but one thing I was happy to have figured - out coaches often want to tag a shot as a particular type. So like a three pointer, mid range, or whatever else it may be. With my shot chart, it automatically tags the shot based on where they added it, which I think is pretty neat.

https://bsky.app/profile/jordanmorgan10.bsky.social/post/3ll...

gavinhoward 3/30/2025||
Designing a new VCS, operating system, and GUI framework because those are the three things I am most worried will be taken over by corporate interests.

I don't know which one I will actually implement, though.

Syntaf 3/30/2025||
I'm trying to make it easier to run clubs, associations & organizations with a platform called embolt.app[1].

We're offering online memberships, event management, and a member database packed with features. Membership management is a crowded space, but it's also a low-tech space with lots of sleeping giants not willing to iterate on their product.

It's been a really fun project so far and even more rewarding to see clubs using embolt for their daily operations.

[1] https://embolt.app

ffsm8 3/31/2025||
I threw together a ratio calculator for Dyson sphere project to get the last two achievements done.

https://wohlben.github.io/factory-fractals/recipes/75?target... It's not really optimized for mobile though, and I actually forgot to give mobile users the recipe picker.

And there seems to be a strange bug only with the rare quartz recipe (it thinks it'll provide 1/4 more items then it does).

wahnfrieden 3/31/2025||
Manabi Reader - learn Japanese by reading on iOS/maCOS https://reader.manabi.io

I quit my job a couple years back to work on this app full-time, as well as its companion flashcard app, Manabi Flashcards. The goal is to help you learn through immersion.

What's special about it? Manabi Reader became popular as an Japanese-focused alternative to services like LingQ in that it locally tracks and analyzes all the words and kanji you read and study. It shows you which words are new and which you're currently learning via flashcards, so you can easily find content that suits your level and see what flashcards to prioritize adding. It also passively accumulates an on-device (and in your personal iCloud) corpus of example sentences from your reading.

I had built this part-time while working over many years (starting with flashcards and then the reader app) but going full-time gave me the time to do a full rewrite: SwiftUI, native iOS + macOS, and an offline-first architecture that syncs with iCloud and my server in the background.

Although it has a companion SRS algorithm (SM-2) flashcard app, it's also excellent for mining Anki cards. This works with AnkiMobile on iOS and AnkiConnect on desktop.

You can use it like a web browser for the web, or subscribe to RSS feeds. It comes with a bunch of curated content by level. Recently I added EPUB support, pitch accents, and note-taking with todos.

I'm now almost done adding a manga mode via Mokuro.

Next I plan on adding more media types (video, YouTube, PDFs), AI functionality (grammar explanations, document Q&A, etc), Yomitan/Yomichan dictionaries for bilingual/monolingual EPWING and Wiktionary support, and more service integrations such as 2-way sync for WaniKani, JPDB, and existing Anki decks. I've begun work on these items and hope to share more soon.

I'd also like to make this app much more beginner-friendly so that people with zero Japanese knowledge can start learning. Currently it assumes you can read kana at least.

Previous discussion [2023]: https://news.ycombinator.com/item?id=36674259

cerpins 3/31/2025||
Working on a full on Riichi Mahjong web client because I really like the game and want to make a more serious english client without anime.

Did it also to learn rust, which made it easy to convert the engine code into webassembly and create a hand score calculator for the game :)! https://cerpins.com/mahjong-tool

Plans now are to finish the client, then freshen up the calculator with some QOL and visuals, surely a bug fix might be needed here and there as well.

smine 3/30/2025||
Making a webapp (an inside-messenger mini-app) to create, hold and manage local amateur tennis tournaments.

So far I've built stuff like automatically created and advanced tournament brackets with group stage, match schedules, participation queue and achievements. Not that hard, really, but helped me get into the backend side of web-development.

We currently organize 2-4 events each weekend for 300 people of different skill levels.

So far it's exclusive for our small community, but I'm thinking of offering it to similar groups of people in other cities.

seanwilson 3/31/2025||
I'm still iterating on a WCAG accessible palette creator for web design/UI:

https://www.inclusivecolors.com/

I use it myself for making branded palettes for projects because it gives you full control over the hue, saturation and lightness curves (instead of these being mostly autogenerated), and it helps you make tint/shades for multiple swatches at a time that go together (rather than a single swatch at a time).

Get in touch if you have any feature requests!

nickandbro 3/31/2025|
I am working on a site that makes it easier for people to learn Vim. It started with me delving into containerization and Neovim plugins and then took on its own identity. It's called:

vimgolf.ai

Right now, only has two levels but I soon plan to add all the Vim motions and use reasoning models as bots that start off the level with you. Apparently, reasoning models like o3-high, Claude 3.7 thinking, and Gemini 2.5 pro are good at finding new ways to transform files using Vim. Kind of silly to have them do that, but I find it kind of cool.

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