See what your phone is really doing.
KYD (Know Your Devices) shows you, in a retro terminal look, step by step what's happening on your Android device – from your input to the storage chip. Real, observed steps appear bright, simulated kernel and hardware steps appear dimmed.
A terminal that actually talks to your device
No summaries – every single step Android takes internally.
Flows, step by step
Follow exactly what happens when you save a text, take a photo, install an app, or search for GPS, Bluetooth devices or Wi-Fi networks – every intermediate step explained individually.
Every sensor, live
Query your device's sensors directly and see the raw data Android actually exposes to apps.
Coding sandbox
Build programs yourself, line by line. Currently a calculator you program step by step until it actually works – more programs are planned.
Glossary with animations
Terms covering the kernel, storage, apps and camera sensors – including animations showing how a transistor or a NAND flash cell (like in an SSD) actually works.
Real vs. simulated
Every step is clearly marked: bright when it was genuinely observed on your device – dimmed when it simulates a kernel or hardware level that isn't visible without root.
Retro terminal look
Consistently styled as a DOS-era terminal – with its own keyboard, prompt and commands, just like a real one.
KYD is in active development.
Not yet on the Play Store – more flows, hardware-lab programs and more are already planned.