Mobile utility app to set video wallpapers on the lock screen only.

Opportunity: The user has spotted a specific gap in the current app market. They're on the hunt for an app that can set a video wallpaper exclusively on the lock screen, but they've found that all the options out there, even the popular ones, only let you set it on the home screen or both at the same time. This opens up a nice 'micro-SaaS' or paid app opportunity.

Product Form: The product would be a straightforward utility app for Android (since "Play Store" was mentioned) and potentially iOS. Its main job would be to do one thing really well: let users set a video as their lock screen wallpaper, independent of the home screen wallpaper. The user interface should be simple and focused, highlighting its unique selling point.

Expected Revenue: Given the user's frustration and active search for a solution, it’s clear they’d be willing to pay for an app that solves this problem. A one-time purchase model makes the most sense. A price point between $1.99 and $4.99 would be a reasonable impulse buy for users who value this level of customization. Revenue will depend on market visibility, but the niche is validated and targets the large Android customization community.