Choose automatic pill dispensers when the question fits its direct job: it release a preloaded medication compartment at scheduled times and provide local alarms, reducing access to other doses while depending on correct filling, programming, power, user response, and a current medication plan; medication reminder devices instead prompt a person at planned medication times through sound light vibration calls or messages.
The word instead makes this a use-case decision, not a contest over secondary capabilities. A situation favors automatic pill dispensers when the required job is to release a preloaded medication compartment at scheduled times and provide local alarms. A situation favors medication reminder devices when the required job is to prompt a person at planned medication times through sound light vibration calls or messages.