SpectrumView is an educational and reference app developed by Oxford Wave Research Ltd. It provides a high-quality, real-time spectrogram and spectrum analyzer display for the iPhone, iPad, and iPod Touch. With SpectrumView, users can visualize the frequencies they can hear in their surroundings, as well as those that are beyond their hearing range.

The app offers various features to enhance the user experience. Users can refresh the spectrogram to clear the display, set their own minimum and maximum scale values, and configure linear or logarithmic frequency scales. SpectrumView also allows users to freeze and hold the peaks of the frequency envelope in Spectrum Analyzer mode.

In addition to its analysis capabilities, SpectrumView offers practical functions such as recording and playback of audio files, access to recordings and snapshots using the "Files" app, and the ability to share recorded files via email or iTunes file-sharing. The app also supports Soundcloud integration, allowing users to upload or download audio files.

Overall, SpectrumView is a versatile tool for acoustic analysis, music calibration, and speech frequency feedback. Its user-friendly interface and comprehensive features make it a valuable resource for anyone interested in exploring and understanding sound frequencies.