2ndLine is a mobile app that provides a second phone number for users in the US and Canada. It is designed for mobile professionals, freelancers, and entrepreneurs who need a separate number for business purposes. The app allows users to make and receive voice calls, send unlimited text and picture messages, and make unlimited free phone calls to any phone number in the US and Canada. Users can also add money or earn free money by completing offers to their account and make low-cost international calls. The app offers features such as emojis, stickers, and gifs, voicemail transcription, caller ID, passcode, call forwarding, and customizable text-tone, ringtone, and vibration.

2ndLine provides a local phone number that users can give to their friends, allowing them to call and message from a separate number on devices they already have, via Wi-Fi or their existing cellular network. The app also offers a unified inbox, allowing users to send and receive their texts directly via 2ndLine, using it as their one-stop SMS texting app.

The app's privacy policy and terms of use are available on the 2ndLine website.

In summary, 2ndLine is a mobile app that provides a second phone number for users in the US and Canada, designed for mobile professionals, freelancers, and entrepreneurs. It offers unlimited text and picture messaging, unlimited calling to the US and Canada, and cheap international calling. The app also offers features such as emojis, stickers, and gifs, voicemail transcription, caller ID, passcode, call forwarding, and customizable text-tone, ringtone, and vibration.