This TikTok clone is number one on the App Store. But is it all smoke and mirrors?

If you've visited the App Store on your iPhone over the past few days, you might have noticed an app you’ve never heard of before occupying the number one spot on the charts.

The app, [INS: Zynn :INS], is a brand-new, short-form video platform that launched earlier this month on Apple’s App Store and Google Play. So what...