Projects
Apps, gadgets and half-built ideas, each with its own write-up.
Trend Setter
Is it going up or down? Red, amber and green squares for every time scale at once, from the last 10 seconds to the last 2 years, for audio level, Google searches and stock prices side by side.
Slime Tray
A stretchy, glossy, squelchy slime toy for tablets. Grab it, poke holes in it, swirl it, add glitter. Pure vibe coded for the kids, start to finish, in one afternoon.
TatNav
Zero hassle free shit. Point your phone at something left out on the street and it goes on a map for anyone nearby. No login, no typing, no forms.
Speedy
Crowdsourced average speed cameras. Phones along a road read number plates on-device, and when two of them see the same car, Speedy works out how fast it went between them.
Scriptic
A social platform for creating, playing and hosting clue trails over SMS. Treasure hunts, quizzes and riddles, played by text message.
Audio Positioning System
Pinpoints where sounds are in a room from the tiny differences in when they reach a microphone in each corner. Runs in the browser, with a simulated room to try it without the hardware.
Sudoku Solver and Grader
A free sudoku solver and difficulty grader. Scan a puzzle with your camera, watch it solved step by step, and see how hard it really is.
The Whask
The idea for this came about after I was asked to whip some cream for a key lime pie. I found the conventional whisk action didn't feel right and caused strain…
Time is Money
A counter that reframes your working hours as money earned, and money as the hours it costs you.
bristoljon.uk
The site you're reading. Now a static build rather than PHP and MySQL.
3D Viewer
Automates a stereoscopic 3D effect by restyling paired iframes from height and depth attributes in the source HTML.
Dozenal Calculator
A free dozenal (base 12) calculator and converter. Works in dozenal or decimal, with exact fractions and recurring digits shown.
One Time Pad Encryption
One-time pad encryption and decryption in the browser. Unbreakable given a good key, and simple with it.
iMedic - Paramedic App
An iOS app written in Objective-C for paramedics — assessment tools and drug calculations.