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Universal Ruler: Explore and measure everything you can imagine, from the subatomic world to the vastness of the Cosmos.

Have you ever wondered how big a virus is compared to a cell, or how the size of the Sun compares to the galaxy?
Universal Ruler is a simple, interactive, and educational tool designed to visualize, compare, and measure objects at all known scales of physics.

INTERACTIVE SCALE EXPLORATION
Smoothly navigate through a continuous logarithmic zoom ranging from the Planck Length (10³⁵ m) to the Observable Universe (10²⁶ m).

• Subatomic and Quantum: Quarks, leptons, neutrons, and the theoretical frontier of physics.

• Cell Biology and Virology: DNA, coronavirus (SARS-CoV-2), bacteria, red blood cells, and neurons.

• Anatomy and Clinical Scale: Organs, blood vessels, medical instruments, and body structures. • Human and Terrestrial Scale: Iconic structures, buildings, volcanoes, and global geography.

• Astronomy and Cosmos: Planets, supergiant stars (Betelgeuse, VY Canis Majoris), nebulae, black holes, and galaxies.

CLINICAL AND MEASUREMENT TOOLS
Designed for both curious minds and healthcare and education professionals:

• On-Screen Physical-Digital Ruler: Direct on-screen calibration for quick measurements in centimeters and millimeters.

• Medical and Physical Unit Converter: Instant conversion between milligrams, grams, micrograms, milliliters, liters, nanometers, and microns.

• Digital Tilt Level: High-precision bubble level-type tool guided by your device's gyroscopic and orientation sensors.

• Complete Bibliographic References: Exact equivalencies in meters, units of measurement, and documented conceptual references.

KEY FEATURES

• Fluid and intuitive graphical interface optimized for smartphones and tablets.

• Immersive and switchable soundtrack.

• Dynamic transition to space mode on astronomical scales.

• Works 100% offline without a constant internet connection.

Download Universal Ruler today and carry the entire universe in your pocket!