The app has been updated and is now bundled with the English version, available here: https://play.google.com/store/search?q=wavepad+audio+editor+free&c=apps&hl=en
WavePad Music and Audio Editor is a full-featured professional audio and music editor. Using WavePad, you can edit and record music, voice, and other recordings. You can edit audio files using cut, copy, paste, and other tools. You can also add audio special effects, including echo, amplification, and noise reduction.
WavePad audio editor supports multiple formats including vox, gsm and more! Whether you're a professional or a home audiophile, WavePad has all the tools you need to edit audio files. Typical applications include ringtones, narration, fine-tuning sound bits, and more!
WavePad features:
•Supports multiple file formats including wave and aiff
•Editing functions include cut, copy, paste, insert, trim, etc.
•Special effects include amplification, normalization, echo, etc.
•Handle multiple files
•Supports automatic fine-tuning and voice-activated recording
•Choose a sampling rate of 8000-44100hz, 8-32 bits
•Recording runs in the background when the screen is off
•Upload to and download from your Google Drive and Dropbox accounts