One of his apparent favorites: Yubo, an app that’s growing in popularity among teenagers.

The threats were reportedly made before the May 24 mass shooting in Uvalde, Texas.

The users told the news outlet it appeared that he was able to stay on the platform.

Social media sites have long grappled with policing threats and other violent content.

Here’s what you gotta know about Yubo:

What is Yubo?

The app, formerly known as Yellow, describes itself as “your place to be you.”

The app is available on Apple and Android mobile devices.

Yubo says it has60 million Gen Z usersacross 40 countries.

Gen Z refers to people born between 1997 and 2012.

As of Tuesday, Yubo was No.

25 on Apple’s charts for free social networking apps.

It was ranked No.

31 on Google’s Play’s charts for free social apps.

In the US, Yubo has been downloaded 18.3 million times, the firm said.

How did the shooter use Yubo?

His Yubo profile included a link to what appeared to be his Instagram account, which has been removed.

Robbins said she reported the account but the company didn’t do anything.

The Washington Postreported that Ramos would post images of dead cats and joked about sexual assault.

What is Yubo doing to combat violent threats on the app?

Yubo, like other social networks, has rules against posting content that encourages or glorifies violence.

Yubo uses a combination of technology and human moderators, according to Williams, the spokeswoman.

Yubo has faced criticism for other issues, including failing to combatsexual exploitationandracism on the app.

Did the shooter use other social media apps besides Yubo?

McCraw said that Ramos was mentioned as “a school shooter” in a February Instagram chat.

In March, he chatted twice on Instagram with people about buying a gun.

On March 14, the gunman said, “Ten more days,” McCraw said.

A user asked, “Are you going to shoot up a school or something?”

Greg Abbott had previously said the gunman posted his plans on Facebook before the attack.

Meta spokesman Andy Stone tweeted, “The messages Gov.

Abbott described were private one-to-one text messages that were discovered after the terrible tragedy occurred.”

CNET viewed what appeared to be his Instagram and TikTok accounts before they were removed.

On Instagram, Ramos shared an image of two guns and tagged another user.

TikTok didn’t respond to questions about what appeared to be Ramos' TikTok account.

The profile said “Kids be scared irl.”

The Texas Department of Public Safety didn’t respond to questions about Ramos' Yubo and Instagram accounts.