All Sensors vs HelixNotes

All Sensors is a focused utility for seeing — really seeing — what every sensor on your iPhone or iPad reports, in real time. Twenty-one sensors, one clean dashboard: • Motion: accelerometer, gyroscope, magnetometer, device motion (fused IMU), pedometer, altimeter, motion activity classifier • Location: GPS coordinates, speed, altitude, heading (true & magnetic), barometric pressure • System: battery level & charging state, thermal state, CPU cores & load, memory pressure, storage usage, screen brightness • Connectivity: Wi-Fi network type, cellular carrier & radio technology, Bluetooth state and discovered peripherals • Hardware: camera capabilities, lens enumeration, microphone audio levels, ambient light estimate, proximity, torch level Each sensor has its own detail screen with three-axis charts, gauges, raw value readouts, and a live magnitude calculation. Tap into any sensor to see what's actually being read by the underlying iOS APIs (CMMotionManager, CLLocationManager, CMAltimeter, CMPedometer, CMMotionActivityManager, CBCentralManager, NWPathMonitor, AVCaptureDevice, ProcessInfo, UIDevice, HKHealthStore). ▼ Show-Off Mode Tap the Show-Off banner on any sensor detail screen and the device transforms. The sensor takes over the full screen with a theatrical visualization — flight HUDs, compass roses, gravity wells, oscilloscopes, gauges, lighthouses. There are 74 unique full-bleed visualizations across 21 sensors. Swipe horizontally to switch sensors, swipe vertically to cycle variants, tap the grid icon to jump to any of them. It's a great way to demo what your phone is doing right now to a friend, a class, or yourself. ▼ Logger A real recorder. Pick any subset of sensors, set a sample rate (60 Hz down to 1 Hz, per sensor), tap record, walk around. When you stop, your session shows up in a browser with timeline, sensor-by-sensor breakdown, and one-tap export to CSV or JSON for analysis in Numbers, Excel, Python, R, or whatever you use. Logs are stored in a local SQLite database under your app's Documents folder; nothing is uploaded. ▼ HealthKit The Health tab shows HealthKit metrics such as heart rate, blood oxygen, respiratory rate, steps, energy, distance, body measurements, and profile values when you grant read access. The app does not write to HealthKit. ▼ Siri & Shortcuts "Get Sensor Reading", "Start Sensor Recording", "Stop Sensor Recording", and "Export Sensor Data" are wired as App Intents. Add them to a Shortcut, ask Siri, automate from Focus modes. ▼ Privacy Every reading stays on your device. There is no analytics SDK, no ad SDK, no crash reporter, no remote backend. The app makes no outbound network requests except a single optional ping to 1.1.1.1 when you ask the Network sensor to test connectivity. Built for developers, makers, students, hardware hobbyists, geocachers, weather watchers, and anyone who's ever wondered what their phone really knows about itself.

HelixNotes is a private, open-source Markdown notes app. Your notes remain standard Markdown files under your control. No account is required, and HelixNotes has no company-operated cloud. Write with a clean visual editor or switch to source mode when you want direct access to the Markdown. Organize your work with notebooks, tags, wiki links and full-text search. Features include: • Tasks collected from checklists across your notes • List and calendar views with priorities and due dates • Wiki links and an interactive graph view • Daily notes with a built-in calendar • Markdown tables, code blocks and syntax highlighting • KaTeX mathematical notation and Mermaid diagrams • Outline navigation and tag autocomplete • Version history and automatic backups • Light, dark and customizable themes • Optional WebDAV sync with your own server • Optional AI tools using your own provider Nothing leaves your device unless you enable a feature that connects to an external service. Your notes stay readable outside HelixNotes, without a proprietary format or platform lock-in. HelixNotes is free software released under the GNU AGPLv3. Its source code is publicly available on GitLab.