Is there a gadget to help Mom keep better track of her medications?

A fellow caregiver asked...

I visited my mom last week. She lives over 200 miles away from me and has no family near-by. While I was there I noticed that sometimes her weekly pill box would have a full Tuesday compartment on Wednesday, which means she didn't take her thyroid medication at all. She's in good health, but I am worried about her "forgetting" her pills. She's a real spitfire and independent and doesn't have any major health issues so I don't want to upset her but is there some gadget I could get her to keep track of her medicines like with an alarm or something.