Globdrop
A geography game. Place cities, landmarks and fictional islands on a map, or name flags against the clock. 16 scenarios, free to play, with ads.
- TypeScript
- Vite
- No UI framework
- Vitest
A small software lab.
Vedratic is a small software lab by the team behind Momusa. We build our own games, apps and tools, such as Globdrop, Andamio, Ahorreo, Chronotopia and Footlley Smash, and write down how they work. It is for anyone who wants to try them, or to read how they are made, without creating an account.
- 8
- apps and tools
- 31
- articles on how they're built
- 0
- accounts to create
Projects
A game, two apps, a 3D airport history and a set of calculators, all of them active. Each page explains what the project does, how it works and what it can't do.
Andamio
A Gantt editor that lives in your browser. Plans are saved on your device and export to JSON, Mermaid and SVG.
- React 19
- TypeScript
- Vite
- Tailwind CSS
- Mermaid
Ahorreo
Personal finance built from the statements your bank already gives you. Files are read and stored on your device; there is no server behind it.
- React 18
- TypeScript
- Vite
- IndexedDB (Dexie)
- Vitest
Chronotopia
Places rebuilt in 3D, year by year: the Barcelona–El Prat, Ibiza and Palma de Mallorca airports from their first fields to the works planned for the 2030s, and the Sagrada Família from 1882, with the sources for every stage.
- TypeScript
- Three.js
- camera-controls
- Vite
Footlley Smash
A 1v1 arcade footvolley game in 3D, with the speed of Windjammers, on a walled padel-style court. Play the CPU, a friend on the same keyboard or online with a room code.
- TypeScript
- Three.js
- Vite
- PeerJS (WebRTC)
- Vitest
Tools
Small calculators that grew out of our own projects: task buffers with PERT, how much a map projection distorts area and shape, and a mortgage with your share of it.
How we work
Three things that hold for everything we have published here so far.
Your data stays on your device
Andamio saves your plans in your browser's localStorage, and Ahorreo keeps your finances in IndexedDB. Neither has a server to send them to. The calculators work out their results on the page. Globdrop only stores preferences such as your language and theme, although its ads are served by Google.
No accounts
Nothing here asks you to sign up or log in, so there is no user database to leak and no password to forget. The trade-off is that nothing syncs by itself: you move your data between devices with files you export.
Small code
We use the smallest stack that does the job. Globdrop is plain TypeScript with no UI framework, about 19 KB of JavaScript once gzipped. Andamio has far more interface, so it uses React, and Mermaid for its charts.
Start here
Two of our most complete articles from each line.
Latest writing
Notes from building these projects, on planning, maps and money.
Which aircraft fly in which year, at El Prat and Ibiza
How Chronotopia picks the aircraft, airlines and liveries for each year from a table of weighted rows, how busy it makes each airport, and which parts are estimates.
Calibrating a map image: pixels, bounding boxes and the 50 km threshold
How a Globdrop scenario turns a miss into kilometres: bounding boxes, mapRealWidth, maxDistance, where 50 km came from, and why the real-world maps now measure on the sphere.
A runway is one line and two fractions
How Chronotopia stores a runway's whole history as one centreline with dated phases, grows it smoothly between them, and hatches the part that is only planned.
All 31 articles →
Or by line: Building software · Maps & geography · Money & privacy · Places & history