This app has been made for musicians who want to train relative pitch within a key. It is also possible to test if you have perfect pitch. With this app you can also test if you recognize a sequence of tones.
This app has been made for musicians, but it can be enjoyed by non-musicians as well. Most people will recognize the sound of an instrument. But will you recognize 3 different instruments that play simultaneously? Or even 5 instruments?
There must be thousands of chords, but all these chords are nothing more than a few chord types that are being transposed to different keys. If you learn to recognize the most important types, you will recognize the majority of the chords that is being used in classical and in popular music.
All 3 apps are free and Ad-Free.