Fitness and calorie counting apps are meant to boost people's spirits, helping them become healthier by tracking their progress.

But many find them to be a complete downer and an utter detriment, a new study says.

Some experience a sense of shame, disappointment, frustration and futility when using these apps, undermining their attempts to improve their health, researchers reported Wednesday in the British Journal of Health Psychology.

"We found a lot of blame and shame, with people feeling they were not doing as well as they should be," senior researcher Paulina Bondaronek, a senior research fellow at University College London, said in a news release. "These emotional effects may end up harming people's motivation and their health."

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