iPad Screenshots


The Particles is the definitive interactive guide to subatomic particles and particle physics.

Have you ever wondered what particle physics is and why the Higgs Boson is so important? The Particles will help you discover in an interactive and fun way.

- Discover the five families of subatomic particles - Leptons, Quarks, Bosons, Mesons, and Baryons

- Browse over 125 real particle ‘event’ images and videos

- Read popular ‘biographies’ of each particle, describing its nature, role, and discovery

- Hundreds of links take you to the A-Z of particle physics with its details and definitions of key concepts, particle detectors, laboratories and physicists

Starting from an interactive fan design you spin and discover the five families of particles. From there you select an individual particle and are taken to its biography and images.

The images range from historic cloud and bubble chamber photographs to the latest event displays recorded by particle detectors at CERN, Fermilab, and other major laboratories.
They are accompanied by detailed explanations which explain how the particles behave, how we observe them, and what it all means.

Also included are data tables for students or professional users, giving details on each particle's mass, lifetime, charge, spin, quark content, decay paths, and so on.

To complete the app there are pages introducing the world of particle physics and giving explanations of the names, symbols, and data used throughout.

The Particles has been developed by Science Photo Library in partnership with leading physicist Professor Frank Close. It is a modern source of information on particle physics for everyone.

What’s New

Version 1.3

We've updated The Particles to work smoothly with the latest iOS version and maybe added a something extra..

Ratings and Reviews

4.2 out of 5
17 Ratings

17 Ratings

Steamystuarts ,

Exactly what I was looking for!!!!

I am a Quantum Physics enthusiast not a student or scientist and I have found this app to be a wonderful and intuitive reference guide. An absolute must have for any college student in particle physics and the perfect companion while listening to the Feynman Lectures. I want to emphasize how easy and intuitive the app is to use. This keeps the focus on the content and away from the navigation which, in this app, is second nature from the outset. Thanks for a great tool!

Kc 1 5 ,

Great app for the physics enthusiast!

I am in to particle physics and this app is a must have for any particle physics fan.

heyyou9999999 ,

Very disappointing

I'm a particle physicist. This app tells the history of various particles but doesn't give any useful information about what they actually are or how they behave: no branching ratios, very few quantum numbers, and almost no physics at all. It's an expensive and inferior alternative to the PDG booklet and Wikipedia.


Science Photo Library Ltd
164.7 MB

Requires iOS 10.0 or later. Compatible with iPad.



Age Rating


  • Family Sharing

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