It supports a huge variety of media file types, including MP3, MP4, AVI, CUE, WMA, M4R, AAC, M4V, M4A, FLAC, ALAC, MKV, and more. It even supports file types that are not normally compatible with iOS, including MKV, AVI, FLAC, and CUE, allowing them to be played in the native Music and Movie apps on iOS.
Using WALTR is simple. After closing iTunes, a user just needs to plug an iPhone or iPad into a Mac and open the WALTR app. The iOS device and its available storage space is listed at the top of the app, and files can be dragged to the blank space in the app for immediate transfer to the iOS device.
Uploads begin as soon as a file is dragged into the WALTR app, and most uploads are very quick, taking a few seconds. The app has been experiencing some issues uploading certain file types like AVIs, but the developers are working to fix any remaining bugs.
Once a file has been transferred to the iPhone or iPad, it is accessible in either the native Movies or Music app on the iOS device, and overall, the WALTR process is simpler than converting via a separate app and then uploading through iTunes.
WALTR for Mac can be purchased from Softorino for the discounted price of $14.97, and a free trial is also available so users can give the software a try.
Update: The codes that MacRumors had available are now gone, but a free trial of the software is still available from Softorino.