Locket, an app for sharing photos to friends' homescreens, hits the top of the App Store

In fact, one video made by a TikTok user in the U.K. topped 5 million views in a single day, Moss noted.While it’s common for app developers to leverage TikTok to drive installs at the time of launch, Moss denies that any sort of paid influencer marketing took place here, nor did he run paid advertisements on TikTok or elsewhere, he says.Today, Locket remains in the No. 1 position on the iPhone’s Top Free Apps chart as a result of its TikTok exposure — and because its early adopters invited their friends to download the app and check it out, driving further installs.To get started using the app, download Locket from the App Store and sign up by verifying your phone number.Locket then requests access to your iPhone’s Contacts and Camera in order to function. “We’ll see.”But the creator believes there’s potential in Locket beyond its current photo widget experience — perhaps even growing out a set of features inside the app as users share more photos over time.“I think there is something pretty meaningful to be built in the close friends and family space,” Moss says.