Its actually pretty good pronunciation. The problem your having is that some words end in a vowel while the next ones begin with one so the sounds become enmeshed to sound like one long word. Ex חולצה אתה. Although they are two separate words, when a hebrew speaker says them it sound like this: חולצאאתה.
Is anyone else having trouble with the app's pronunciations of some of these sentences? Often, the words are so quick and mumbled that it's nearly impossible to discern them.
Are there rules/guidelines for when spoken words are blended with others -- with spoken syllables dropped? I'm hearing here ... Azoh kholtzat (tiny pause) alovesh., So kholzah + atah -> kholzat-a , with one "ah" syllable dropped? The only break in חולצה אתה לובש being in the middle of אתה.