Bandmate tuner will tell you the note you are playing.

It is especially helpful for brass instruments: Trumpet, French horn, Trombone, Baritone, Tuba!

You can use this tool via their website or app (for iOs only). 

Be sure to allow the program to use your microphone in order for it to work.

Seeing Music will let you visualize what you play. I like to use the Hilbert Painter Visualization setting. 

Don't forget you will need to allow the site to use your microphone in order for it to work.

Playing with a metronome is a great way to check if you are playing at a steady tempo (speed). 

Start slow to make sure you are correctly playing notes and rhythms. You can speed up the tempo as you get better.