There is a doppler handheld machine which i saw june mummies in the other forum also buy. Its to scan baby heartbeat. But i think with baby kicks in the near future to remind you. You probably won't need it. and if we buy, we will not be able to resist the temptation to scan everyday... too much scanning is not good too.
And if we scan wrongly, we scare ourselves only hahaha
I also drink similac milk but i find that it make me very bloated.