I didn't, I don't need another app to track me. A deposit is and should be enough to ensure the return of the item.

I think for many people the proposition "you need to download this app to do something for which the app is not needed" is a non-starter, also for tech-savvy people.

Another thing to consider is that I (and I guess many other people) are only willing to download an app while having wifi, since my data volumne in LTE is limited.