1. Application Overview

• App Name & Tagline: HardTools — Industrial Utility Kit & Sensor Diagnostics Engine.

• Developer: JanabiSoft

• Core Purpose: A field-grade, multiplatform hardware diagnostic and measurement toolkit built for technicians, carpenters, audio engineers, and DIY fabricators.

2. Core Feature Modules & Tools

2.1 AR Measure (Measure AR)

• Capabilities: Real-time 3D spatial measurement for distance, area ($m^2$), and angle ($\degree$) using ToF LiDAR and camera tracking.

• Telemetry Readouts: Normal Angle, Plane Drift ($\pm 2\text{ mm}$), surface confidence detection, and pin accumulation.

• Unit Support: Instant switching between Metric (m / cm) and Imperial (ft / in).

2.2 Compass Tools (Compass)

• Primary Dial: Displays magnetic heading, true azimuth, cardinal direction, and magnetic declination.

• Geomagnetic & GPS Data: Latitude/Longitude position fix, ellipsoidal height/altitude, and magnetic field strength ($\mu\text{T}$).

• Dual-Axis Level: Integrated pitch ($\theta$) and roll ($\phi$) inclinometer balance bars.

• Sound Quick-Peek: Compact MEMS acoustic monitor embedded in the compass UI.

2.3 Noise SPL Meter (Noise Meter)

• Acoustic Monitoring: Real-time dBA Sound Pressure Level gauge with selectable fast/slow response times.

• Spectrogram Telemetry: 15-second rolling window recording Minimum, Average ($L_{eq}$), and Maximum Peak sound levels against OSHA thresholds.

• Safety Features: Permissible daily sound dose calculation and customizable Mic Gain Trim/Calibration ($\pm 12\text{ dB}$).

2.4 Torch LED (Tactical Light)

• Output Control: High-lumens flashlight boost up to 950 Lumens.

• Modes: Variable strobe frequency control and automated SOS pattern emergency signalling.

3. Settings & Hardware Calibration

• Measurement Standards: Global unit toggle across AR ruler, bubble level, and calipers.

• AR Grid Plane Alignment: Real-time sub-millimeter tracking overlay toggles.

• True North Reference: Toggle between GPS geomagnetism modeling vs device fluxgate sensor.

• Acoustic Weighting Curves: Toggle between dBA (human auditory response) and dBC (industrial low-frequency response).

• Thermal & Battery Protection: Flashlight auto-shutoff timers (5 min, 15 min, Never).

• Haptic Feedback: Tactical impulse ticks upon angle snap-lock alignment.

4. Monetization & Pro Licensing

• Free Tier: Standard sensor diagnostics with AdMob banner ads.

• HardTools Pro ($2.99 / $4.99 Lifetime One-Time):

  • Completely ad-free and offline-first operation.

  • Precision LiDAR Matrix unlocked.

  • Unlimited CAD / CSV / DWG vector exports.

  • Continuous background sensor telemetry logging.