FreqHead
An offline dictionary for people who listen.
FreqHead is an offline audio dictionary for listeners, hobbyists, engineers, reviewers, and professionals who want clear definitions without distraction. Whether the task is evaluating in-ear monitors, comparing converters, working in a studio, or simply establishing what a term actually means, it answers with no internet connection required. Coverage runs from foundational acoustic principles through transducer behaviour, signal chain fundamentals, technical performance characteristics, critical listening vocabulary, and audio engineering terminology. The interface carries no advertising, no banners, no accounts, and no tracking.
Get it on Google PlayWhat it does
| Area | Capabilities |
|---|---|
| Dictionary | Foundational and advanced terms across acoustics, transducers, signal chain, and technical performance |
| Vocabulary | Critical listening terminology and audio engineering terms |
| Brand catalogue | A curated offline database covering in-ear monitors, headphones, converters, amplifiers, and more |
| Daily term | One term offered each day, to build vocabulary gradually |
| Progress | Five levels, from Listener through Enthusiast, Audiophile, and Purist to Expert |
| Search | Real time search with recent history |
| Saving | Favourites and recently viewed |
| Sound journal | Private listening notes stored on the device, with a daily quote |
| Sharing | Any term exported as a clean branded card |
| Themes | Light, dark, and system, switched without a restart |
| Privacy | Entirely offline, no account, no analytics, nothing collected or transmitted |
How it is used
Search for a term and read the definition, or take the term offered each day and build vocabulary gradually. Marking terms as learned advances a level, which gives the reading a direction rather than leaving it open ended, and favourites hold the terms worth returning to. The brand catalogue answers questions about specific equipment without a connection, and the sound journal records listening impressions privately alongside a daily quote. Every definition is bundled with the application and stored in its private area on the device, so nothing is fetched and nothing is sent.