[15][16] Tian started Neptune, a wearable technology company, in January 2013, while he was 17 and still studying at Marianopolis College, in Westmount, Quebec.

Before building a prototype or incorporating the company, Tian posted some conceptual drawings of a smartwatch, the Neptune Pine, on the internet and issued a press release announcing the product's launch.

[19] The Pine was prominently featured in the 2017 film The Fate of the Furious, the CBS TV series Extant produced by Steven Spielberg and starring Halle Berry, as well as the music video for the song Smartphones by Trey Songz.

[24] However, Tian claims that the project ultimately needed more financing to be realized, and that the funds he had raised were not sufficient to complete development of the product.

[28] The data operates on AT&T's cellular network in the United States, whereas the calls and texts are provided through Fonus' proprietary voice over IP (VoIP) application.

[27][28] In late 2023, Tian unveiled global wireless plans on Fonus with unlimited data, calls & texts in over 50 countries, starting at US$19.99 per month.