A Hurricane Irma wrecks havoc on the Caribbean, more than 1 million people downloaded walkie-talkie app Zello. It's now topped Apple's app store chart in the United States!
It's currently beating Youtube, Facebook and Snapchat!
Zello was launched in 2012, but the walkie-talkie app was ranked number one on Apple's iTunes Chart on Thursday morning after people started using it to communicate during Hurricane Harvey.
Zello is different compared to other messaging apps because people don't need to dial a phone number, or send a text. Instead they just touch and told an "echo" button to speak to each other live, and groups of up to 2,000 can be created!
Read the full article here: CNBC