A mutual fund company is trying to use technology to encourage workers to save more for post-retirement health care costs.

Fidelity Investments, Boston, will be using Web analytical tools from WebMD Health Corp., New York, to help holders of Fidelity health savings accounts analyze post-retirement health care savings needs.

Typical couples need to have about $200,000 in savings at retirement simply to cover post-retirement health care costs, according to Fidelity, Boston.