I can only speak about this app for the last five days. We just got a 7 1/2 week old puppy. With assistance from this app we have had no accidents. Just remember that this app helps you by reminding you to take your puppy out, but think about errorless learning dont allow your puppy to fail. Restrict the pup to a small area and only allow them to use that area just after the pup has gone out. Otherwise I create my little one until he has gone outside.
Cali_diver about Puddle & Pile