After losing my wallet several times and not having a clue when the last time I had it on me was, I implemented a similar system. I now habitually triple tap my three designated pockets for phone, wallet, keys, every time I walk through a doorway.
That way, if any of them are missing, I know they must be in the room I just left.
That way, if any of them are missing, I know they must be in the room I just left.