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Bright spots, physical activity investments that (almost) worked: Carrot Rewards app, driving engagement with pennies a day

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  • Correction notice This article has been corrected since it published Online First. The article type has been amended to Bright Spots.

  • Contributors MSM, RR, EKP, HP contributed to conceptualisation and writing of the manuscript, LW and SR collected data (organised) and contributed to writing. All approved the final version.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests MSM reports consulting income from 2015 to 2018 from Carrot Insights. RR was a Mitacs postdoctoral fellow at Western University and Carrot Insights. SR and LW were Carrot Insights employees at time of first submission. EP completed her Masters degree with MSM.

  • Patient consent for publication Not required.

  • Provenance and peer review Not commissioned; externally peer reviewed.