NCT01473342.

Trial name or title	Mila Blooms intervention study: an App for promoting physical activity and health diet among adolescent survivors of chilhood cancer
Methods	Design: RCT (own controls) Setting: Single site paediatric oncology unit, USA
Participants	Number Estimated enrolment: 30 Age 12‐19 years Sex Both genders Diagnosis ALL Inclusion criteria Off therapy for 2+ years Karnofsky score > 80 Speak and read/write fluent English Working phone number Participants must live with parents Exclusion criteria Physician reported deficits in neurocognitive functioning
Interventions	Control phase: All participants will take part in the 8‐week control phase where they will complete initial data collection Intervention: The intervention will commence after the 8‐week control phased has finished and will run for 9 weeks. The participants will receive a smart phone which contains the Mila Blooms gaming app. The app consists of: tools for tracking health behaviours avatar system to provide virtual rewards social network of users for support Participants will also receive weekly coaching telephone calls to help with goal‐setting and compliance
Outcomes	Healthy diet Physical activity Prevent weight gain
Starting date	April 2011
Contact information	Sharnail Bazemore: sharnail.bazemore@duke.edu
Notes