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Our visual perception system, with its 20+ billion neurons, is processing more information than all of our other senses combined. Its pattern-matching capabilities have evolved immensely over the centuries, giving us the ability to detect both larger patterns and intricate details within milliseconds. We are wired to detect shapes and colors, so why not use this system for visualizing and perceiving data?

Itinerant is an experimental weather forecast app, utilizing the human visual perception system (i.e. recognizing shapes and colors) instead of the symbolic interpretation system (i.e. reading words and numbers). It is an experiment in outperforming traditional weather information data displays in terms of how long it takes to parse and understand the information. Even more importantly, it is an experiment in helping to change the nature of that understanding.

-- Imprecise by design

We all know and accept weather forecasting to be about approximation. Good forecasts are more accurate than others, but no forecast is ever precise since it is, after all, a prediction. However, contrary to the nature of weather forecasting we are also quite used to our data interfaces presenting us with artificially precise data, giving us an illusion of precision.

Since we’re all used to reading data as symbols, it was natural that the weather forecast interfaces (in TV news segments, mobile apps, etc) would evolve to show us these data points using numbers. We have been trained over time to accept those 23°C shown by the weather app as a promise of some sort, and we accept the fact that it is most probably going to be broken to a certain degree – if you’re directly in the sun it will be hotter, if you’re in the shade it will be a bit cooler, and even more cool if there’s a sudden gust of wind.

For these reasons, Itinerant is intentionally imprecise.

-- Vague by design

We’re already accustomed to bluer hues representing colder temperatures and orange and red ones representing warmth, but on the other hand we have a hard time remembering exact color shades and we even have difficulty naming color shades in a consistent manner, so there’s quite a bit of ambiguity there. For exactly these reasons, color is used to visualize temperature in Itinerant.

Is it 19°C? 23°C? You can’t tell immediately, and that’s the whole point. After using the app for a while, your visual processing system kicks in and you won’t need the auxiliary interface (tap the screen once to access it) to help you out anymore because you’ve already memorized the patterns without thinking about it. After a while, that green blob speaks to you, without you even trying.

-- Controls

You can move around the time axis by swiping left-right across the screen. Tapping the screen brings up an auxiliary interface where you can see the data point values as sliders, so you can play around and “train the eye” to map those hard data values into abstract shapes and colors.

I hope you'll have fun using Itinerant.

Thank you,

What’s New

Version 1.2

This version brings a couple of improvements and bug fixes:

- Info labels now fade out after a couple of seconds of inactivity so you can take a wallpaper-ready screenshot
- Fahrenheit support (tap the temperature icon to toggle between Celsius/Fahrenheit)
- Better visibility for rain in the dark
- Simpler time labels
- Caching of previously fetched forecasts
- Fixed a bug where the music playing in the background was stopped when opening Itinerant
- Fixed axis-aligned shape glitches on older phones

Ratings and Reviews

5.0 out of 5
5 Ratings

5 Ratings

TheOnlyAvailableNickname ,

Great idea - any chance of hourly forecasts?

I love the app, interpreting blobs as weather is surprisingly intuitive! Currently the only feature that conventional weather apps have and that this app is missing is an hourly forecast - perhaps make a slider for how the blob changes over the next 24 hours? With that change, I would 100% switch to Itinerant for my weather forecasting!

V Sinha ,


Nice idea

Sithious ,

Spooky and Cool

I love this.

App Privacy

The developer, Vladimir Mitrovic, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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