The MBTA wants your input on the mobile ticketing application they plan on rolling out next Fall—and all you need to do is sign up online.

Officials from the transit agency said Monday that they are inching closer to the launch of the first-ever phone-based ticket purchasing system in the United States, but before they unveil the historic project in Boston, they want to know what riders think.

Those who frequent the Commuter Rail are urged to add their name to a list so they can receive updates and alerts about where the project is and track its progression prior to launching.

“We want to start engaging customers early,” said Josh Robin, director of innovation for the MBTA.  “[Passengers] can sign up and if they are entering their email, they will receive updates and information on the project.”

Some riders who join the mailing list may also get picked to take part in focus groups and workshops, where MBTA officials will collect feedback and fine-tune the app based on user preferences and suggestions.

“Time is moving quickly,” said Robin. “We will be doing a lot in the next few weeks and in early July we will be doing a lot of focus groups and testing sessions, showing people demo versions of the app and maybe change it accordingly.”

Commuters can sign up for alerts and updates on the project here.

The MBTA has teamed up with England-based mobile ticketing company Masabi US to deliver the app, which will let riders purchase Commuter Rail passes once they are already on the train.

The paperless system will be available on iPhone, Android or Blackberry devices and is expected to come down the tracks later this year.

The move should save the MBTA some money, since it will eliminate the need for additional ticket kiosks and knock out the use of paper expenses. Train conductors will be trained to check tickets using a smartphone device, potentially curbing fare evasion and ticket scams, according to T officials.