  We report measurements of the branching fractions and $CP$ asymmetries for
$D_s^{+} \rightarrow K^{+} \eta $, $D_s^{+} \rightarrow K^{+} \pi^0 $, and
$D_s^{+} \rightarrow \pi^{+} \eta $ decays, and the branching fraction for
$D_s^{+} \rightarrow \pi^{+} \pi^0$. Our results are based on a data sample
corresponding to an integrated luminosity of 921 fb$^{-1}$ collected by the
Belle detector at the KEKB $e^+e^-$ asymmetric-energy collider. Our
measurements of $CP$ asymmetries in these decays are the most precise to-date;
no evidence for $CP$ violation is found.
