220+ iOS apps curated and reviewed
The best eevblog 121gw apps on iPhone average 4.5★ across 220+ titles — we've ranked them by what real users actually keep on their phones. Updated May 2026.
This app connects to a specific Bluetooth multimeter to display readings and offers enhanced control features. It includes options for spoken measurements, a continuity buzzer, and dark mode, while currently lacking multi-meter support.
This app connects to your car's OBD2 port via a compatible adapter to read vehicle data. Monitor fuel economy, clear check engine lights, and create custom dashboards for real-time diagnostics and performance tracking.
Measure, record, and analyze sound levels in your environment. This app offers precision metering, noise elimination tools, hearing protection features, and home audio calibration. It provides detailed reports and can be used with device microphones or external ones.
Transform your device into a professional sound level meter and audio analyzer. Measure ambient noise, monitor decibel levels, and visualize sound frequencies in real time. It also offers advanced sleep tracking with sound recognition to identify disruptions.
Easily test your internet connection speed on mobile devices. Accurately measure Wi-Fi and cellular network performance, including download, upload, ping, and jitter. Track historical results and troubleshoot connectivity issues.
Diagnose and scan your network with this comprehensive tool. Identify internet connection and WiFi issues, detect unauthorized access, and analyze network performance. Offers advanced features like AR mode for signal visualization and IP geolocation.
Monitor your internet connection speed in real-time with this network tool. It provides accurate statistics for download and upload speeds, along with daily data usage. Compatible with all network types, it helps diagnose slow loading times.
This electronic pocket reference guide provides essential information for electrical professionals. It offers calculations, code tables, and detailed sections on motors, ampacities, grounding, and more, all accessible on your mobile device.
Transform your device into a professional audio analysis tool with advanced FFT analysis, SPL monitoring, and detailed visualizations. Record, analyze, and export audio data with precision calibration and multiple weighting filters.
This application transforms your device into a professional sound level meter, offering precise dBA and dBC measurements. It features advanced analysis tools like frequency spectrum analysis and data export, making it ideal for audio professionals and anyone interested in sound environments.
Test your electrical knowledge daily with a new question based on the US electrical code. Perfect for apprentices, journeymen, and masters seeking to learn or refresh their understanding of electrical concepts and regulations.
This professional audio analysis app offers a comprehensive suite of tools for acoustic measurements, including SPL, RTA, and FFT. It calibrates device microphones for accurate results and allows for the addition of powerful optional modules for advanced analysis.
This app provides a comprehensive suite of calculators and reference tools for electronics enthusiasts and professionals. It includes features for component identification, circuit calculations, and electrical property analysis, aiding in both study and practical work.
Wirelessly connect to compatible tools to capture live measurements and data remotely. Analyze trends, generate reports with notes and photos, and receive instant alerts for performance changes. Store and access your data securely in the cloud.
Create pure sine wave audio tones across a wide frequency range. This tool is ideal for tuning instruments, conducting hearing tests, performing science experiments, and testing audio equipment. Easily adjust frequencies and volume, with support for AirPlay devices.
This app helps you test and analyze your internet connection. It measures download, upload, and ping speeds, displays connection consistency, and checks Wi-Fi signal strength. Advanced features include LAN device scanning, Wi-Fi security checks, and an augmented reality speed test.
This app generates sound waves to test and enhance speaker performance. It offers customizable frequencies, test modes, and stereo channel testing. You can also boost bass and volume, and play audio from files or Apple Music.
This app measures and analyzes internet connection performance, including download/upload speeds and ping. It offers advanced WiFi analysis, network diagnostics, and tools to optimize your connection for gaming, streaming, and work.
Build and simulate electronic circuits with dynamic animations of voltage, current, and charge. Adjust parameters in real-time and generate input signals with your finger. Explore a vast library of components and community designs.