SensorLog vs TrueMeter

With SensorLog you can read sensor data from the iPhone, iPad and Apple Watch. The sensor data can be saved as a file in CSV or JSON format, streamed via TCP/UDP or sent as an HTTP request. The most important functions for iPhone and iPad: - Sensor data can be recorded at up to 100Hz (depending on the iOS device version and sensor type). - Sensor data can be streamed in server or client mode using TCP or UDP. Depending on the network speed and the server or client configuration used, this is possible with up to 100Hz. - Via HTTP(S) GET/POST request, sensor data in JSON format (POST) or form-url encoded (POST and GET) can be transmitted to a REST API with up to 20Hz. - With the SensorLog Remote Client/Server function, an iPad or iPhone can connect as a SensorLog Remote Client to an iPhone or iPad, which takes on the role of SensorLog Remote Server. The client's sensor data can be visualized on the server, and the server can control the clients (start/stop logging, start/stop sending data). - Logging can be started and stopped using Siri and shortcuts. - SensorLog supports Core ML models created with Apple's Create ML app. Log data with SensorLog, train a model with the data in Create ML, load exported models in SensorLog and log the model prediction. Supported Create ML models are: Activity Classifier, Tabular Regressor and Tabular Classifier. - If you have an Apple Watch, HealthKit data such as heart rate, energy used, sleep and movement data can be exported on the watch as a csv or json file and then transferred to your iPhone. Sensor data iPhone / iPad: For sample log files, please visit the SensorLog homepage (link App Support). - CLLocation, CLHeading, CMAccelerometer, CMGyroData, CMMagnetometer, CMDeviceMotion, CMActivity, CMPedometer, CMAltimeter, WLAN and network provider IP addresses, device orientation, battery info, decibels. The most important functions for Apple Watch: - Logging Option 1: Logging duration up to 1 hour Simultaneous logging of all selectable sensor data is supported in the background with up to 50Hz. Individual sensors can be logged with a higher frequency of up to 100Hz. Sending data via HTTP requests is supported. - Logging option 2: Logging duration greater than 1 hour In the background only logging of the accelerometer data with max. 50Hz is supported. In the foreground all sensor data with up to 100Hz. Sending data via HTTP requests is only supported when the app is in the foreground. - Via HTTP(S) GET/POST request, sensor data can be transmitted to a REST API with up to 10Hz in JSON format (POST) or form-url encoded (POST and GET). - The Health Store data feature off the SensorLog Watch app allows you to export HealthKit data like heart rate, energy burned, sleep, and movement data. This data is automatically recorded by your Watch and can be read out and exported by SensorLog as csv or json file and transferred to your iPhone. - Logging can be started and stopped using Siri and Shortcuts. Sensor Data Watch: For sample log files, please visit the SensorLog homepage (link App Support). - CLLocation, CMAccelerometer, CMDeviceMotion, CMActivity, CMPedometer, CMAltimeter, battery info

TrueMeter turns the sensors in your iPhone into three clean, honest measurement tools — a sound level meter, a light meter, and a level and vibration tool. No subscription. No ads. No account. No data collected. ONE-TIME PURCHASE, NOT A SUBSCRIPTION Most measurement apps charge you every month for a tool you use occasionally. TrueMeter doesn't. Everything unlocks with a single purchase, once, and it stays unlocked. SOUND LEVEL METER • Live decibel readings with min, average, max, and Leq • A-weighting (dBA) free — C and Z weighting with Pro • Real-time graph of the last 60 seconds • Record timestamped sessions • Add a location note to any recording • Threshold alerts when sound crosses a level you set Useful for documenting a noisy neighbour, checking whether a room or venue is uncomfortably loud, or comparing appliances. LIGHT METER • Estimated lux readings using your camera • Save and name spots around your home • Compare every spot, ranked brightest to dimmest • Front or rear camera Built for the question people actually ask: which spot gets more light? LEVEL & VIBRATION • Precise digital angle to 0.1 degrees • Classic bubble level, flat or edge mode • Zero against any reference surface • Three-axis vibration readings No permissions needed. Works completely offline. EXPORT REAL REPORTS Turn recordings into documents you can actually send to someone. • PDF reports with timestamps, statistics, and graphs • CSV export with full raw data • iCloud sync across your own devices BUILT HONESTLY Your iPhone is a remarkable device. It is not a laboratory instrument, and we won't pretend otherwise. TrueMeter tells you its real limits inside the app. Sound readings are reliable roughly between 40 and 95 dBA — above that, iPhone microphones physically clip and read low. Light readings are comparative estimates, because the true ambient light sensor isn't available to apps. You'll notice we don't offer an EMF detector or a ghost detector. That's deliberate. iPhones cannot measure EMF radiation — apps claiming otherwise are reading the magnetometer and calling it something it isn't. PRIVACY TrueMeter collects nothing. No account, no analytics, no tracking, no servers. Audio and camera frames are processed live to compute readings and are never recorded, stored, or transmitted. Everything stays on your device. TRUEMETER PRO — $4.99, ONCE • Unlimited saved sessions and light spots • PDF reports and CSV export • dBC and dBZ weightings • Threshold alerts • Home Screen widgets • iCloud sync • Sound calibration offset IMPORTANT TrueMeter provides reference measurements from your device's built-in sensors for general and educational use. It is not a certified measuring instrument and is not intended for medical, safety, legal, or occupational-compliance purposes. Do not rely on it to assess hearing safety or environmental hazards. If you need certified measurements, consult a qualified professional. ——— Privacy: https://culi.app/apps/truemeter/privacy-policy/ Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ (Apple standard EULA) Questions or feedback: support@culi.app