hi im a mobile/web developer, been doing this since 4-5 years now, i have massive experience building apps with great UI/UX and best practices in mind, for this app we can have a backend (admin panel) running on laravel or symfony, for you to update items & details, we can have a API to fetch items that the android app will use to get data. easy as tea. if you've any questions we can have a discussion in chat, thanx