For anyone doing remote (i.e., playing or singing at a distance from recording desk) recording on their own with no engineer, there has always been the frustration of starting the recording and moving over to the mic, guitar, bass or whatever to play the part. Sure, one can do precounts to get the first start right, but what if you had undo and could restart right there at the mic (or, for me, with the contrabass most of the time in an isolation room)?
Most of you have probably seen the few Android and IOS products that are out now, but in case you haven't, they are very handy. They link to your DAW PC via your home or studio network (wi-fi), and they let your phone or iPad or Android pad control features of your DAW. Some of the apps let you design the control, which can be tedious (although simply having transport and undo is a godsend), and some have pre-packaged DAW interfaces linked to popular products.
No plug here at all, but I use DAW Remote with Sonar and it is KILLER. You need to install Apple's Bonjour driver and a clever driver called rtpMIDI (that is free, and from a great and innovative guy), and after that your app sees your DAW PC and sends and receives sysex. The Sonar setup is gorgeous and flexible, with several pages of track-mixer looks and transport, and a dozen pre-assigned buttons for arming recording, muting, redo/undo and on and on.
I put it on my music stand in my isolation room and I'm in heaven, controlling the whole recording logistic right at my instrument perch!