Cooller: Smart Audio Converter

A file gets imported, and the conversion screen shows bitrate, sample rate, channel count, and volume before anything happens to it. Audio and video sources, MP3, WAV, FLAC, M4A, OGG among them, plus audio pulled from video, sit in one place after import. Peak normalization is an optional pass. Trimming and silence removal happen in the same step, and the result writes into a local library rather than a desktop application. The library grows with each conversion and stays on the phone, with nothing sent to a server. Settings from one file become the starting point for the next, so a repeated workflow needs fewer taps. On-device extras sit alongside the core conversion path. Transcription, speaker labeling, and a short summary run locally, without changing the main conversion. A wrong sample rate mismatches with playback hardware, a wrong channel count changes how a mix sounds, and a trim point lands where it was set. None of this depends on a connection.