Simple web apps
for a modern world

MDI Web Apps builds small, fast, focused tools for everyday life. No bloat, no clutter, no learning curve. Open one in your browser, add it to your home screen, and it just works.

Explore the apps

The apps

Each one is built to do one job really well.

Overhead

What plane is that?

Overhead shows you real-time flight information for every plane passing directly above you: the airline, where it came from, where it's headed, the aircraft type, and its distance, altitude and speed. A radar view maps every plane around you, updated live.

  • Live data, updated every few seconds
  • Radar view with flight paths and airports
  • Works anywhere, straight from the browser
Open Overhead

WhatCookBook

Your cookbooks, finally searchable.

You know the recipe is in one of your cookbooks, but which one? WhatCookBook turns your real bookshelf into a searchable index. Add your books, then search every recipe across all of them at once, and jump straight to the right book and page.

  • Search across your whole bookshelf
  • Browse friends' bookshelves for inspiration
  • Rate recipes so the good ones are easy to find again
Open WhatCookBook

Bill Helper

Know what you owe before the bill arrives.

Quarterly and yearly bills should never be a surprise. Bill Helper tracks each of your regular bills and shows how much you need in your bills account today. Add the amount recommended each payday and you will never scramble when the bill lands, again.

  • See the running total for every bill at a glance
  • Handles weekly, monthly, quarterly and yearly bills
  • No bank logins, no spreadsheets, no surprises
Open Bill Helper

Secret Gift Monkey

Secret Santa without the hassle.

Run your family or office Kris Kringle in minutes. Invite everyone by email, hit draw, and each person privately finds out who they're buying for. Wishlists make gift-picking easier, and the app remembers past years so nobody draws the same person twice in a row.

  • Assignments stay secret, even from the organiser
  • Wishlists so every gift is a good one
  • History across years, no repeat pairings
Open Secret Gift Monkey

What Country

How many can you name?

What Country helps you learn and recognise countries around the world. Learn to recognise the shape of countries using shape alone, no map. Also learn the geography of a region of the world by naming countries and their neighbours. Wrong answers land in a flashcard queue that keeps testing you until you know them for good.

  • Three modes: Shape Recognition, Country Geography and Travel
  • Flashcard review brings back anything you get wrong
  • Free to play, no account needed
Play What Country

Galton Board

Watch randomness build a bell curve.

Drop ball bearings into a pyramid of pegs. Each ball bounces left or right at every peg, purely at random, and lands in a bin at the bottom. One ball tells you nothing. A thousand of them build the same curve every time.

  • Real bearings falling, not a chart drawing itself
  • Tilt the odds and watch the whole curve lean with them
  • Free to play, no account needed
Open Galton Board

Flight Price Watch

Know when to book.

Private preview

Flight Price Watch tracks Qantas, Virgin and Jetstar fares on the routes and dates you care about, then emails you a daily digest showing how prices are moving.

Sample Flight Price Watch daily fare digest email, showing the cheapest flights on a route with recent price changes
  • Tracks fares over time to spot price movements early
  • Receive a daily email digest with price changes highlighted
  • Currently a private preview, but enquire if you're interested
Interested? Contact us

Flight Logger

Every aircraft passing overhead, logged.

Private preview

Overhead automatically logs every plane passing overhead: aircraft type, airline, route and altitude. View summary or detail reports with an hour-by-hour summary chart, airline summaries, and a searchable log to find exactly the detail you need.

Flight Logger report dashboard showing unique aircraft and airline counts alongside an hour-by-hour sightings chart
  • Sightings logged automatically, no manual entry
  • Filter and sort by aircraft, flight, route or airline
  • Currently a private preview, but enquire if you're interested
Interested? Contact us

Why people like MDI apps

Nothing to install

Every app runs in your browser on any device. Want an icon on your phone? Add it to your home screen and it behaves like a native app.

Fast and focused

Each app does one job and does it well. No feature sprawl, no settings maze, no ten-step onboarding. You're productive within the first minute.

Try one now

The apps are free to use. The private-preview ones just need a quick message first.

Contact us

A question, an idea, or a problem with one of the apps? Send a message and we'll get back to you.