Payyr

Direct Debit payments for friends

Does the same job

TL
The load-bearing vocabulary of Claude▲703
Life & fun · 10d ago · louisabraham.github.io
iPhone app takes simultaneous images from 2 lenses, fuses into 1 photo▲329
Photosynthesis fires two of your iPhone
Life & fun · 28d ago · photosynthesis.camera
SoloUno▲310
Take control of hair pulling, nail biting & skin picking
Life & fun · 28d ago · solouno.io
Scroll through all 43252003274489856000 Rubik's Cube states▲295
Scroll through all 43,252,003,274,489,856,000 reachable Rubik's Cube permutations.
Life & fun · 26d ago · everycube.alen.is
Expeditione▲265
The Interactive 3D Encyclopedia
Life & fun · 21d ago · expeditione.fun
Eigendrum - Draw any shape and hear what it sounds like as a drum▲243
Hi HN, I built Eigendrum, a web tool that solves the 2D wave equation for arbitrary shapes so you can hear what they sound like as drums. How it works: * Solves -∇²u = λu using finite element analysis (Kφ = λMφ) on a triangle mesh. * Validated to <0.1% error against closed-form solutions for circles (Bessel zeros) and rectangles. * Sound model factors in strike location, Rayleigh damping, and mallet width. * Includes Kac drums I & II to demonstrate identical sound spectra from different geometries. * No frameworks, build steps, or dependencies. Repo and tests:…
Life & fun · 26d ago · baselashraf81.github.io

Slack▲2,713
Be less busy. Real-time messaging, archiving & search.
Work · 2013 · slack.com
Trello▲1,004
Powering millions of teams to work smarter, together
Work · 2013 · trello.com
IM
I mapped US medical prices. Save thousands by driving a few miles▲488
Life & fun · 2013 · bestmedicareprice.com
Intercom▲466
Communicate personally with every single customer.
Life & fun · 2013
Canva▲436
Amazingly simple graphic design
Growth · 2013
IM
I made an HN for the financial industry▲422
Life & fun · 2013 · boredbanker.com