Kayf
How everything around you works: 92 devices opened up, part by part, step by step, with the physics behind them. Fully in English and Arabic.
Download on the App Store92 devices
From the electric fan and the refrigerator to the jet engine, the MRI scanner and the nuclear reactor. Home, kitchen, electronics, computing, transport, energy, everyday mechanisms, medical and science.
Every part explained
An interactive exploded view: tap any part to see what it does, what it is made of and which steps it takes part in.
Step by step
An animated sequence of how the device works, with the parts lighting up as they play their role.
The physics
36 principles from electromagnetic induction to Bernoulli, each linked to every device that uses it, plus a 110-term glossary.
Fix it
Troubleshooting guides with real symptoms, likely causes and what to do, for every device.
Quiz yourself
Five questions per device, category quizzes and a mixed challenge. Track what you have learned.
Kayf Pro is a single one-time purchase that unlocks every device, all troubleshooting guides, every quiz and device comparison. 22 devices, every principle and the glossary are free forever. No account, no ads, no data collection.