  In 2012 Bryson, Ono, Pitman and Rhoades showed how the generating functions
for certain strongly unimodal sequences are related to quantum modular and mock
modular forms. They proved some parity results and conjectured some mod 4
congruences for the coefficients of these generating functions. In 2016 Kim,
Lim and Lovejoy obtained similar results for odd-balanced unimodal sequences
and made similar mod 4 conjectures. We prove all of these mod 4 conjectures and
similar congruences for the Andrews spt-function and related mock theta
functions. Our method of proof involves new Hecke-Rogers type identities for
indefinite binary quadratic forms and the Hurwitz class number.
