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App usage and system usability for pilots 1 and 2.
| Use and usability | Pilot 1 (N=27) | Pilot 2 (N=16) |
| App usage during 8 weeks of intervention, mean (SD) | 22.9 (18.7) | 24.9 (19.8) |
| App usage during 8 weeks following intervention, mean (SD) | 7.27 (9.86) | 3.73 (6.43) |
| Participants using app during 8 weeks following intervention, n (%) | 16 (59) | 8 (50) |
| System Usability Scale score, mean (SD) | 73.00 (15.82) | 64.00 (11.83) |
