Fibit’s app, which buyers of new bands must download to set up and use their Fitbits, topped all free apps on Apple’s iPhone on Sunday. The strong downloads point to strong sales over the holiday season.

Other apps on the Christmas rankings include the photo-sharing app SnapChat at second place, Nintendo’s Super Mario Run at third place, Amazon Alexa app at fourth and the video sharing YouTube app placing fifth.

By Tuesday, Fibit was the second most-downloaded app, behind only Super Mario Run.

According to App Annie, Fitbit was ranked 41 among Apple’s iPhone free apps on December. 23 and 65 on December 21. On December 15, App Annie said Fitbit’s ranking was 112. In the Google Play store, the Fitbit app jumped from 99 on December 22 to 7 on December 26.

Last year the Fitbit app managed to take the No.1 spot on the App Store on Christmas Day.

Fitbit shares gained 8 percent on Tuesday to close at $7.83 on the news. The stock is still down more than 70 percent over concerns over heightened competition. Shares fell 30 percent on November 2 after the company reported dismal third-quarter results and lackluster guidance for the fourth quarter. The company said it wasn’t able to produce as many Flex 2 devices as it had expected due to manufacturing issues but also saw weakness in China.