
Free Online Calculators for Finance, Health & Math | RealCalculators
Free collection of 48 online calculators for finance, health, math, and everyday needs.
@avinashraj61815 · X
i vibe coded this week
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Free collection of 48 online calculators for finance, health, math, and everyday needs.
@avinashraj61815 · X
i vibe coded this week

Answer 12 questions to get an estimated Praxis 5001 test score and identify your weak areas.
@7Sk2n5E8hK98730 · X

Explore interactive visualizations of mathematical curves, fractals, symmetry, and topology.
@vkuoo · X
Added more demos showcasing graph-math relationships, built with Codex.

Block distracting websites by solving math or coding puzzles.
hackitup7 · HN
TLDR built a Chrome site blocker that lets you into distracting sites only after you do some math or simple coding (JS only right now). Direct link to extension (the site just gives you more context): https://chromewebstore.google.com/detail/sphinx-earn-your-di... Philosophically it's a speed bump rather than a hard gate, because you'll eventually tear a gate down but you'll leave a speed bump. I've always eventually removed site blockers, or just had them become a nuisance that I reflexively dismiss before getting to distracting sites. Site blockers don't really reduce the "start navigating to a distracting site" muscle memory, and they eventually just become annoying. Dopamine is a hell of a drug. At the same time, I've been getting frustrated that my intermediate/advanced math skills have atrophied, and becoming more senior in my career (plus AI...) has caused my coding skills to atrophy even further. Realistically I'm not going to force myself to do math or coding exercises aft

Compare 50+ perp DEXs in one place — live volume, open interest, funding rates, fees, price arbitrage and best execution routes. Hyperliquid, Lighter, Aster, Nado, dYdX and more.
@cryppimagic · X
中国的朋友们,大家好。我很喜欢看你们在 X 上发的内容。 想跟大家分享一下,我做了一个完全免费(无任何限制)的套利扫描工具,覆盖 45 家 Perp DEX 和 CEX

A debate platform with AI evaluation and cryptographic voting across 18 phases to find collaborative truth.
@abd_yazouri · X

Upload a receipt photo to split bills with friends using OCR and calculate fair shares privately in your browser.
@shad1126 · X
Vibe coded this last weekend and tried this today with some friends. Works like a charm so sharing whoever wants to use - 🎉 No backend, no API calls to AI agents/Claude/ChatGPT, etc. Pure OCR and basic arithmetic. Fully private in your browser! Go wild!!

Publish work in a private club and manage paying members.
@chenzhangreal · X

Calculate how much meetings and work projects actually cost your company per day.
@mafaldateles_ · X
My first web app is out! I built a tiny tool to help answer a simple question: could that meeting have been an email? You decide.

Get honest feedback in private discussions using stable pseudonyms.
@wheesperapp · X
I built Wheesper to help people speak honestly without losing the context of a real conversation. It evolved from anonymous feedback into private, threaded discussions with stable pseudonyms and moderation controls. Check it out

Discover and organize research papers with AI-powered search and topic curation.
u/rahmanbite · Reddit
Read research papers is funny but find the right one is challenging If I want read a research papers always time consuming: - visit the repository - start bunch of filters - download PDF, read it.. - then what next? reading history missing.. Why not use excel to save the link? this work again, I'm not happy :( and... how to make sure I read paper properly? no test, no judging.. right? Why not AI papers finder tools like SciSpace, Elicit or something like that? Again.. to

Free private finance tools: stress-test your portfolio against Fed rate hikes, project retirement savings with compound growth, and calculate your FIRE number. 100% browser-based —
@Big_Fin_Art · X