Over 1 million people have joined in the last day, with most coming from Puerto Rico and Florida," said founder and chief technology officer Alexey Gavrilov in a blog post Wednesday.
Launched as Zello in 2012, the walkie-talkie app was ranked at number one on Apple's iTunes Chart on Thursday morning with people using it to communicate during Hurricane Harvey, which hit Texas late last month, its chief executive Bill Moore stated on LinkedIn on Wednesday.
While it was launched as Zello five years ago out of Austin, Texas, it actually began life back in 2007 in Russia as Loudtalks, an app for Windows PC where people could talk to each other by holding down a "hot key".
After its official launch in San Francisco later that year, it was slow going, with the app picking up about 10,000 registered users in its first three months, according to a blog post on the Zello site .
But while it has 400,000 active users in Russia, the country blocked the app in April because it does not comply with laws governing "information distribution brokers."
- Hurricane Irma just made a digital walkie-talkie the No. 1 app onlineChicago Tribune
- Austin-based app saved lives in HarveyKHOU
- Everyone is downloading Zello. But will it actually work in a hurricane?Miami Herald
- Free walkie-talkie app tops App Store charts ahead of Hurricane IrmaThe Verge
- A walkie-talkie app called Zello is No. 1 in the App Store because of ...Yahoo News
- Using walkie talkie app Zello during a storm: What you need to knowWTSP 10 News
- Zello looks to dispel rumors about hurricane usage7News - WSVN-TV
- Zello 'Walkie-Talkie' App A Huge Hit As Irma Approaches, But There's A CatchThe Inquisitr
- Walkie-Talkie App Becomes Apple Store's Most Popular As Hurricane Irma NearsCBS St. Louis