I've been using the free version of Memento Database for years, but I finally upgraded to the paid version when I wanted to be able to upload more than three databases to the cloud and transfer them to my new phone. I thought it had worked, until I realized that the databases I downloaded from the cloud weren't the latest versions. I had to spend hours re-entering data. Once that was done, I had no reason to continue the subscription, but something went wrong and I've been charged.