great app, BUT...

the fill-in-the-blanks test is still limited to 4 syllables
(and thats a long lasting & well known issue, Im afraid)
even worse: its not documented - try a test with only >4 length cards and pleco tells you something of "no cards, since …" (but not about the length limit of 4) - therefore only 2 stars

m i r about Pleco Chinese Dictionary, v3.2.10