Making an Egg Timer

No more guessing, always perfectly cooked
The Perfect Egg app is a smart egg timer that calculates the exact cooking time for your perfect egg based on scientific variables. The app combines ease of use with precision for a guaranteed good result.
june 2025
Table of contents
  1. Information
  2. Screenshots
  3. Roadmap
  4. Link to the app

I have boiled many eggs in my life and I still can’t boil a perfect egg. So I decided to take all the data and get scientific. I packaged the result in a handy web app, so that anyone can boil an egg.

Below you can find more information about the app itself.

Information about the app

The Personalized Timer for a perfect egg

This is the heart of the app, where a user fills in a few simple choices. The app calculates the exact cooking time. The input fields are:

Desired Doneness

Instead of vague terms like “soft” or “hard,” the app uses a visual slider. You can slide a button which changes the yolk from left to right: from runny to completely hard-boiled.

Egg Size

Simple buttons to select the size: S, M, L, XL.1I am not entirely sure if all countries work with these egg sizes. Perhaps this needs some more explanation or other options in the future.

Egg Temperature

A switch with two options: “From the fridge” or “At room temperature”.

Cooking Method

A crucial choice: “Start in cold water” or “Place in boiling water”. The app adjusts the instructions and timing accordingly.

Screenshots

Logo and images

Logo the perfect egg app
settings
screenshot of timer
screenshot of tips

Roadmap

New features

I have several new features in mind that I could add, but first I wanted to launch the app with all the basic features. One thing I can already say as a sort of sneak preview, is that I will be building a native iOS app in Swift.

Got curious? Click the button below to go to the webs app.