When WhatsApp users started freaking out about privacy on the messaging app last month, Kevin Woblick knew it was time to encourage his family to move to another chat service: Signal.

The 30-year-old German software developer had broached the topic after Edward Snowden leaked classified documents detailing America’s mass surveillance program. But Woblick couldn’t convince his family to delete WhatsApp despite the Snowden news and the global uproar over digital privacy that followed. So this time, he took a gentler approach.

…

Nidhi Hegde, director of strategy and programs at the American Economic Liberties Project in Washington, DC, said her family uses a mix of WhatsApp and Signal. Some didn’t want to switch to a new messaging service, especially after WhatsApp delayed its privacy updates. On Thursday, WhatsApp was No. 3 in Apple’s top apps for social networking, and Signal was No. 12.

“I think what it has done is make a lot more people (like my mom and older relatives) who are not particularly tech-savvy or thinking about privacy become more aware of Facebook’s power and how their personal data is mined for targeted advertising to feed Facebook’s business,” Hegde said in an email. “And they are now significantly concerned that they have no choice but to accept the terms.”