SkyDex

Collect the day's sky as colour. There is a board of forty-eight cells, and you fill it with today's sky.

iPhone · iOS 17.0 or later · app in Korean

The top is the middle of the night; moving down, it turns to day and then dark again. A filled circle is a sky you captured; an empty ring is still to come.

The board is today

The forty-eight cells are the colours today's sky will pass through. They are worked out again every day from the actual sunrise and sunset where you are and today's forecast for cloud and rain. So a cell that was filled yesterday may be empty today. What the board tells you is not how many you have collected, but how much of today you can show.

Photograph the sky now and the cell for that time fills with the colour you caught. If it comes out different from what was expected, it goes in anyway — the forecast is a guess; the photo was actually there.

Nothing is judged. No pass, no fail, no tolerance. The grey of an overcast day is that day's sky colour too.

Every colour gets a name

The app tells you what colour your sky is in two ways, written in Korean. First comes a comparison you can picture, and beneath it a name with a source. "Usuhanairo" is the more precise answer, but almost nobody can see a colour in that word, and a name you can't see doesn't do a name's job.

The sourced names come from Korean traditional colours, Japanese traditional colours, pigments and standard colour sets, and every value was checked against its source. The app is also honest about how close it is — when the match is close enough it says "the name is", and when it isn't, "the nearest name is".

Filled cells grow older

A photo keeps its true colour for a week, then fades slowly over the next eight weeks. It is not deleted, and it never fades away completely. Photograph the sky at that time again and the cell snaps straight back to full colour.

It isn't a penalty. There is no streak to break and nothing to win back. It's simply an honest way for a board made of sky to say "that sky was a while ago".

Same time, different sky

Days repeat. The same alarm, the same route, the same window. Only the sky above them is never the same twice. The Repeat screen lines up the days you stood at the same time of day, so you can see it. The row is the repetition; the colours are the part that never repeats.

Widgets

Today's board looks just like the app — forty-eight cells, circles for filled ones and rings for empty ones. Today's sky shows the photo you took today with the name of its colour, and it works on the Lock Screen too.

It stays yours