Yolkday

Calm, app-like planners for backyard chicken keepers: choose breeds, size the coop, plan the feed and count down to the first egg, all from university extension numbers.

Type: Backyard chicken planner
Year: 2026
Live product: yolkday.com

The idea

Chicken advice online means long forum threads and numbers that contradict each other. Yolkday gives each question a small, calm tool with one clear answer and shows the source behind every number.

The look borrows from meditation apps on purpose: flat colour, soft waves, big rounded type and one round hen called Sunny.

breeds compared: 38
foods checked: 95
free planners: 7
sources behind the breed data: 139

How it works

Researched numbers
Breed data (eggs a year, size, hardiness, temperament), 95 „can chickens eat …?” answers and the husbandry values behind the planners were researched with sources and stored as structured data.
Seven planners
Flock planner (eggs a week → flock size by breed), breed finder, coop size, feed and cost, first-egg date, hatch calendar and brooder temperatures.
Illustrations from code
Breed portraits are drawn parametrically from each breed's colours and features, so all 38 match in style and new breeds cost minutes, not an illustrator's week.
Tested for everyone
Light and dark themes, an accessibility panel, and automated tests: unit tests, end-to-end tests and axe accessibility checks in both themes.

Tools and features

Flock planner
Eggs you want a week → how many hens of which breed.
Breed finder
A few questions about climate, space and kids.
Can chickens eat it?
A clear verdict for 95 foods, part by part.
Hatch calendar
Day-by-day incubation, from turning to lockdown.

CMS and publishing

The Learn section runs on the shared Studio CMS, with a daily publishing task on the server.

Analytics use Google's Consent Mode v2 and never load on the admin.

Built to be found

Every food and every breed is its own page that answers one search, with a clear verdict at the top.
Title and description lengths are enforced at build time.
Permanent HTTPS redirects and security headers on every response.