If you’ve ever been curious about TikTok or WeChat, you only have a few more days to download them before the apps are removed from Apple’s App Store and Google Play for U.S. users. Come Sunday, Sept.

The Trump administration’s curbs on the Chinese-owned “super app” WeChat were put on hold by a judge, a day before it was to go into effect. Magistrate Judge Laurel Beeler in San Francisco on Saturday ...