Good app, but cant use passcode

I like simplicity of this app, yet stores lots of useful informations about my products. I really like it as a good tool for my small business. However, I share my ipad at home and therefore would like to use the passcode option in order to protect my entries; but when I use and once I close the app, I need to restart my Ipad in order for it to work. Kind of inconvenience, but still like this tool.

Luciernaga paloma about On Shelf, v5.1.5