209+ iOS apps curated and reviewed
If you already know Tape Measure™, this is the deeper bench. 209+ observation device apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of June 2026.
Transform your device into a versatile digital toolkit for precise measurements. Create 2D and 3D floor plans, scan rooms, and measure distances with advanced AI and computer vision. Ideal for DIY projects, home renovations, and professional use.
This app offers precise measurements using augmented reality and on-screen tools. It caters to both professional and everyday needs with features like a flexible measuring tape, bubble level, and photo ruler. Save and manage your measurements within projects for easy access.
Measure objects and spaces using your device's camera with augmented reality. This app offers tools for measuring lengths, heights, areas, and creating floor plans. Save and share your measurements for various projects.
This app provides in-depth system monitoring and hardware insights for your iPhone and iPad. It offers detailed information on CPU, memory, storage, battery, sensors, and more, along with practical testing tools. Ideal for users who want to understand their device's performance and capabilities.
This tool simplifies data collection for tracking behaviors, goal progress, and interventions. It offers customizable observation modules and exports results for analysis or reports. Ideal for professionals, families, and individuals managing behavior.
Transform your device into a powerful measuring tool using augmented reality. Accurately measure objects and spaces by simply pointing your camera. Save, share, and manage your measurements with ease.
This app provides a versatile toolkit for all your measurement needs. It includes a classic ruler, a tape measure, and a camera ruler for precise measurements. Easily switch between units and document your findings by adding measurements directly to photos.
This app provides a suite of digital measurement tools, including a spirit level, angle finder, laser level, and metal detector. It helps users accurately measure angles, check surface flatness, and align objects for various home, DIY, and professional projects. Features include sound and light alerts, calibration, and AR-based laser lines.
Transform your phone into a versatile digital tool. Easily read small text with a powerful magnifier, illuminate dark spaces with a bright flashlight, and even use it as a makeup mirror. It also includes smart tools like a level and rangefinder.
Monitor and manage your iPhone or iPad's system activity and sensor data. Quickly access key device information and control app permissions for sensors. Useful for diagnostics, hardware enthusiasts, and technicians.
This app turns your smartphone into a scientific instrument suite, enabling measurement, recording, analysis, and export of real-time sensor data. It offers tools for kinematics, acoustics, light, magnetism, and more, suitable for students, educators, researchers, and hobbyists.
Monitor your iOS device's system activity and sensor performance in real-time. View detailed device information, track CPU and memory usage, and test sensors like GPS, accelerometer, and gyroscope.
Transform your device into a versatile measuring toolkit. It offers a comprehensive suite of 13+ tools including a barometer, altimeter, compass, metronome, stopwatch, timer, and various levels for diverse applications.
This system enables electronic collection and collation of hand hygiene and personal protective equipment metrics. Observers can customize data collection for their facility, including locations, job roles, and hand hygiene protocols. It provides immediate feedback and performance results.
Measure distances and angles using your device's sensors. This app functions as a ruler, tape measure, rangefinder, protractor, and 3D angle finder, offering a quick and accurate way to take measurements in various conditions.
This utility app transforms your device into a multi-sensor tool. It provides real-time readings for GPS, altitude, speed, barometric pressure, acceleration, magnetic force, sound levels, and light intensity. Visualize data with graphs and maps, mark values, and record sensor information for later analysis.
Quickly tag and annotate dimensions, angles, and shapes on your photos. Streamline decoration and measurement tasks with efficient project saving and export options. Enhance your workflow with various annotation tools and integration capabilities.
View live monitoring video from a connected device directly on your phone. This application allows for remote configuration of device settings, offering enhanced convenience for users.
This utility app provides a portable ruler for on-the-go measurements. It also includes a suite of additional tools like a protractor, spirit level, and various meters for diverse measurement needs.