The || double set is a cortreversial issue but as far as errors, there might be a slight lag matra error sometimes.
Nitnem gutkas do not have chandi di vaar mostly. But sundar gutkas do.
Nitnem gutka consists of following bania:
swaiye (sravag sudh)
shabad hazare (aad and dasam)
barah maha (majh)
(some gutkas contain basant ki vaar)
rehras (sampooran as per bhai mani Singh’s version)
rakhia de shabad
the app however has way more bania including dasam bani.