Hi there

My mother was widowed last month; combine living alone with an increasingly poor memory, she's starting to regularly misplace critical items like keys, wallet and phone. And yesterday she got herself lost when walking to our house, which left us somewhat concerned.

Anyway, as a partial solution, I thought that I could attach some bluetooth tags to things like her keys, which even if she couldn't use an app to find, we could assist her to do so. 

I see there are heaps of these now for sale on eBay, but don't know whether the cheap-as ones will be adequate for this task - and whether the battery will last long enough and/or is replaceable (or is cheap enough just to replace). I also need a few, so wouldn't be keen on paying Tile prices.

I was wondering about ones like this.

Can anyone offer advice on these, including recommended options?

Also, I was wondering about what the best options are to literally find my mother should she get lost again? Would it be just to track one of these bluetooth tags (assuming she has at least one of those items on her), or use a 'find my phone' app? If the latter, does she need to have an actual active data plan on her phone? (she's currently only got minutes and texts).

Many thanks for any advice!