The range of size in the universe, from the tiniest particles to the epic galaxies - we take you on a journey of size that let’s you explore it all with a single swipe. How big is a planet, compared to a human? And how small is an atom really? You can’t fully wrap your head around the scope of things by just reading about them – so this app lets you experience them in comparison to get a feeling for their true scale. By simply swiping you can zoom in and out all the way from the world of fundamental particles up to the largest stars at the edge of the observable universe.

Seamless zooming between the scales of 10^-35 meters to 10^26 meters (no math required)

Amazing fun facts for various scale levels, like the smallest bacterium and the largest black hole

Tap any object for an explanation of what it is and how it works

Beautifully animated illustration of more than 250 objects

Original Kurzgesagt music to complement your experience

What’s New

Version 1.2.0

- Improved overall performance and loading times
- Changed appearance of 15 objects
- Added new objects to explore
- Content bugfixes

Ratings and Reviews

4.9 out of 5
2.2K Ratings

2.2K Ratings

Enrich e's son ,

Arguably the Best Purchase I've Ever Made

I honestly can't remember the last time my curiousity has been so quenched with knowledge. Each animated graphic was aesthetically pleasing and contained a perfectly eye-opening description of the subject matter. My mind got blown with almost every tap.
This app is so well crafted. The quality of each design stays remarkable at all sizes and through each frame, and the one-finger slide mechanic is so smooth to navigate the scales.
The developers managed to fit hundreds if not thousands of years of human knowledge into such a simple, amazing and digestable app and I couldn't recommend it more. At the time of writing this I think it's wild that there's only one other review but I'll make sure to share my experiences in this app with my friends and teachers (I am a 17 year-old at the moment, though this app is great for all ages)
Thanks to Kurzgesagt and all the people who helped make this, I don't know what more I can say that could do this app justice!

Touchgrind BMX is awesome! ,


We are but specks of dust in this extremely vast universe. The size of the universe to a human is not possibly perceivable, and yet this app has managed to make it almost possible. There are cute, funny descriptions of every single object you tap on, and I can stare for hours reading about each thing I tap on and zooming in and out to the smallest thing in the universe, to the universe itself, just barely grasping how small I really am. It is truly an experience to behold. And the fact that there is music and no ads make the whole journey from big to small so much more immersive. I’m so glad I’m helping support In a Nutshell by buying it. This app is a perfect example of their saying “Quality over quantity”. If the price had been one hundred times more, I still would have bought it. Thanks to everyone that made this masterpiece possible, you all deserve it. Kurzgesagt is keeping science beautiful, just how it’s supposed to be.

wilmot13 ,

Puts my existential crisis into perspective

For those of us that fondly remember that classic space film from 1977...that’s right, I’m talking about “Powers of Ten: A Film Dealing with the Relative Size of Things in the Universe and the Effect of Adding Another Zero,” this app is the ultimate expression of the concepts first popularized in that epic saga. Universe in a Nutshell is packed with astounding detail about objects at every scale in our universe (even more than Katamari Damaci!). It’s a collaboration between two of my favorite explainers-of-things: Tim Urban (“Wait But Why?”) and Kurzgesagt (In a Nutshell). Beautifully illustrated, wittily written and expertly engineered, it’ll expand and contract your mind, ultimately leaving you out of breath as you sip the quantum foam from your piping-hot cup of supernova neutrinos in the restaurant at the end of the universe. I’ll rate it a Googol out of a Googol stars, which turns out to be way, way more than the number of stars in the observable universe.

App Privacy

The developer, in a nutshell - kurzgesagt GmbH, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

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

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