Bubble Spirit Level: 2D tilt bubble visualizer with real-time pitch and roll readouts in degrees, responsive spring physics, and level-calibration indication. Powered by Accelerometer and Gravity sensors.
True Cardinal Compass: 3D rotation-matrix azimuth heading dial (0 deg to 360 deg) with cardinal ticks (N/E/S/W) and top red lubber line. Uses device Rotation Vector / Geomagnetic flux calculation instead of uncalibrated raw values.
Dynamic Radial Gauges: Smooth sweep arc gauges with live numeric metrics for Ambient Light (lx), Atmospheric Pressure (hPa), and custom environmental sensors.
Proximity Radar: Distance radar with reactive sonar ripple animation indicating NEAR (< 3 cm) vs FAR object state.

Live Waveform Charts: Multi-axis real-time line charts rendered with high-throughput MPAndroidChart integration. Supports X, Y, Z dynamic streams with bounded memory windows.
Signal Modulus & Frequency Tracking: Real-time vector magnitude computation alongside real-time sampling rate calculation (Hz) with exponential moving average smoothing.
Physical Sensor Fusion Explanations: Deep technical documentation for each sensor:
- Difference between Game Rotation Vector (Gyro + Accel, no magnetic drift) vs Geomagnetic Rotation Vector (Accel + Compass, low power).
- Physical measurement mechanisms (MEMS capacitive combs, Lorentz magnetic force, piezoresistive diaphragms, photodiodes).
- Axis definitions, measurement units (m/s^2, rad/s, uT, lx, hPa), and full hardware manufacturer specifications (vendor, version, power draw, resolution).

Dedicated Background Sensor Looper: Sensor events are dispatched onto a dedicated daemon HandlerThread (THREAD_PRIORITY_MORE_FAVORABLE), eliminating UI frame drops and ANR freezes even at >100 Hz hardware interrupt rates.
Zero Memory Leaks (Bounded Buffers): Chart data pipelines enforce strict circular capacity bounds (N=40 frame window) to avoid garbage collection thrashing and out-of-memory (OOM) exits.
Adaptive Multi-Device Layout: Fully responsive across compact phones, tall aspect ratios, and foldables/tablets (>600 dp) via Jetpack Compose adaptive constraints.
100% Offline & FOSS: Zero analytics, zero ads, zero external tracker libraries, and zero runtime permission requirements for standard motion/environmental sensors.

Tech Stack & Architecture

Language: Kotlin 2.0+ (100% Kotlin)
UI Framework: Jetpack Compose with Material Design 3 (M3)
Design Paradigm: Clean Architecture with unidirectional state flow (StateFlow, SharedFlow, Coroutines)
Hardware Integration: Android Sensors Framework (android.hardware.SensorManager, SensorEventListener)
Graphics & Charting: MPAndroidChart + Compose Canvas vector math
Build System: Gradle 8.9 with Android Gradle Plugin 8.9.0 (Java 17 target)