Could these apps help you lose weight for good this year?

January is a peak time for downloading health and fitness apps and putting those Christmas present fitness trackers to work. But do they actually help you stay motivated? After the Christmas self-indulgence comes the inevitable New Year's resolution to get fit, lose weight, and eat more healthily. But while 65% of us make resolutions, only 12% successfully keep to them, polling firm ComRes finds. When Sarah, 34, a law professor from Australia, wanted to lose weight last year, she took the unusual approach of placing bets that she would achieve her exercise goals.