Left Coast Solutions has developed iJoin, an application for Smartphones and other mobile devices that helps investors determine how much they need to save for retirement to replace their monthly income.

If they are not on track, the application suggests steps the investors can take, as well as specific investments, to reach that goal. And once their session is over, iJoin e-mails each investor a retirement planning summary.

iJoin ran a recent test of its software among 200 workers at eight companies and found that after going through the steps, 97% of the workers decided to participate in their company’s retirement plan, beating the industry average of 79%. Among those already in a 401(k) plan, 68% decided to increase their contribution rates to an average of 10.6%. The industry average is 7.5%.

Asked to rate the service, 76% called it “extremely” or “very” effective, and 81% said they would probably recommend the service to others.