Grace Digital – Remote Contro‪l‬ 4+

I think the problem is that this app, originally shaky, some freezes, but still functional, may have become weaker for iOS 11. It is to be noted that there have been no updates since iOS 9. This weekend though I had a fast internet connection 30 - 60 mbps all weekend, and had relative success with the app. It's possible the app freezes more when the internet connection is slower, works more efficiently on a relatively fast connection,

The app works well controlling the radio and Pandora functions on my Mondo.
Like other reviewers, I wish it would let me control the USB menu. Kind of a nuisance having to get up to select USB songs at the radio. Not a deal-breaker, but would give the app 5 stars if allowed USB file selection.
BTW, the Mondo plays FLAC files recorded at 16-bit, 44.1 kHz. Some of the literature implies only 24-bit, 96 kHz is supported.
I sold my Logitech Squeezebox Radio after I got the Mondo. To compare the two -- the Mondo has much better sound quality using the line out to external amp/speakers. But, you can't control the Mondo's line out volume, again necessitating at walk to the amp to adjust volume. I guess a better amp would have volume remote control, but I'm driving two powered speakers with no remote. All-in-all, the Mondo is a superior product. The app would be perfect with a few tweaks.
I also wish Grace Digital had a Windows PC remote control or Internet remote.

May 2, 2016 I just found this Grace Radio App, downloaded it to my iPad(2) and it connected immediately with my Grace Radio (service pack V226-a-113a-613). What a relief! Trying to scroll around using the radio's dial system was tough, and doing it from the online website only allows me to add stations, etc. but not directly control the radio.

I can't (or haven't figured out how) to add to "My Stuff" yet using the app, BUT...I can control the radio with absolute ease...see all my presets...see all my "Stuff"...in short, LOVE IT.

I can view and add new "stations" to my Pandora account, thumb up and down tracks. Album covers show with each Pandora track being played.

This app allows me to see tracks being played via the radio's USB port, but the app does not yet display the USB menu, nor allow me to select USB tracks (have to use the radio dial system). If it did...killer...I'd have my 500+ CD collection at my fingertips.

I play my Grace radio almost all day because the quality of sound is outstanding when you preset HD streaming stations (like Linn, Pandora, etc), and, because I like lots of variety, it is very easy to change channels or search from the thousands available. This app makes it all come together. I have the radio ported via fiber-optic cable to my receiver for high quality sound. Very nice.