Well done!

In the older version there was no option to sync between iOS devices and the website, so I did not have all at one place.
In the current version this is integrated and working good on iPad and iPhone.
Only one bug I found: Sometimes, when a word is not displayed, but only sound is played, the sound is not being played (about once each lesson). Not a big deal ;-)

Jens Wolfert about Learn Spanish - Qué Onda, v4.1