For the folks here that are non Apple users..(and don't want Apples hand in our pocket) :)… I use an Android app that does much the same as we have been discussing.... and more, with just a single app.. The "Pro" version cost $4.50 The key difference with the Pro version Midi out.. with acceptable latency..

https://play.google.com/store/apps/details?id=com.bytebolt.midiloops&hl=en



You can use your own sound fonts, the supplied sound fonts, or midi out to your hardware
, in my case the Integra7 and Ketron SD1000 plus..

The other App I use for all types of file playback , edits, lyrics is Winlive Pro ( $3.49)..

https://play.google.com/store/apps/details?id=com.promusicsoftware.winlivepro&hl=en_US

Check these two out... they have my stamp of approval


My everyday carry phone is much more... it is my best back up with great apps in the music department..

As an example... for you guys that are getting lazy as you get older , I could take my phone and my Marantz Voice Rover .. and do a senior gig... battery powered and no wires... Bluetooth.. Wireless mic.

Set up time 20 seconds..