I came across this free ear trainer and thought it might be helpful for those who, like me, are working on ear training and being able to better recognize intervals. There are a lot of training tools at this site, but I'm just using this one for now. I don't want to work on too much at one time.
In the page settings, I have the range set to C3-C4 and I set the instrument to acoustic guitar. I'm really finding it useful.
That Tenuto app is great for learning the notes on the fretboard too. I do it while waiting and waiting in waiting rooms at the doctor.
Kurt
Hang in there, Kurt. One day at a time.