Choose medication reminder devices when the question fits its direct job: it prompt a person at planned medication times through sound light vibration calls or messages; automatic pill dispensers instead 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.
The word instead makes this a use-case decision, not a comparison of feature quantity. 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. A situation favors automatic pill dispensers when the required job is to release a preloaded medication compartment at scheduled times and provide local alarms.