Scale - Size Comparison

Contains ads
4.2
395 reviews
Content rating
Everyone
10K+
Downloads
Content rating
Everyone
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About this app

Discover the true scale of the universe!

Have you ever wondered how big a galaxy is compared to a single cell? Or how small a proton really is? Experience a fluid and comprehensive journey through the dimensions of our world.

From the smallest subatomic particles to the vast observable universe, explore dozens of objects in a stunning, modern interface.

Key Features:
- Seamless Unlimited Zoom: Glide through orders of magnitude without boundaries.
- Explore the Microcosmos: Dive deep into atoms, DNA, and cells.
- Journey to the Macrocosmos: Discover planets, stars, nebulas, and entire galaxies.
- Interactive Comparison View: Visualize and compare the sizes of different objects side-by-side.
- Multiple Units: Support for Light Years, SI units, and Imperial units for a truly global experience.
- Dark Mode: A beautiful, eye-friendly design for late-night exploration.
- Educational & Fun: Perfect for students, teachers, and science enthusiasts of all ages.

Start your journey today and see where you fit into the grand design of the cosmos!

I am constantly working on adding new objects and features. If you enjoy the app, please consider leaving a review!
Updated on
May 24, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
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No data collected
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Ratings and reviews

4.3
302 reviews
Nathan Lawson
May 14, 2026
I have thoroughly enjoyed the latest update, and most of my concerns in my previous reviews were addressed. However, there are a few minor changes that would make for another improvement. 1. Being able to set an object's shape as a square. 2. Being able to set length and height independent of each other, creating a sort of squashed or stretched shape. Overall, I greatly enjoy the app, and these few fixes would make for the best possible experience.
19 people found this review helpful
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Drop.apps
March 24, 2026
Thank you for your detailed feedback. I've just updated the app with a lot of improvements. There are now more units, including light years. You can activate a high-contrast mode if you have trouble distinguishing objects with similar colors or and a side-by-side comparison mode. More shapes are also planned for addition soon.
A Google user
December 13, 2019
App was great, did exactly what I needed it to do. Also, I saw you reply to someone who gave you 1 star because the app wouldn't work. They claimed they had "a very nice phone" and you responded saying you can see what phone they were using and it wasn't nice at all. I thought that was pretty hilarious.. One thing, it'd be pretty cool if we could make rectangles, would make it a bit easier to use the app.
36 people found this review helpful
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Drop.apps
December 17, 2019
Thank you for your feedback! I thought about rectangles aswell. Maybe I'll add them in the future.
Stickman Productions (StickmanProductions)
February 28, 2021
This app is very cool. I just use this to compare things I make and to see if the sizes are reasonable. I made a Planck length and a quark and was surprised how large quarks are. But when it comes to cosmic scales, like galaxies, which are measured in light-years and other metric measurements, I need to use other websites to calculate how many kilometers are in galaxies. Also, I cannot exit the comparison. Maybe you cannot do that and I understand that. Overall this is a great app.
21 people found this review helpful
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What’s new

šŸš€ What's New in this Update?
2.4.3:
- Fixed incorrect icon colors
- General bug fixes

2.4.2:
- Bug fixes and stability improvements

2.4.1:
- Fixed editor behavior for long numbers