Table 1.
Inclusion and exclusion criteria according to the PICOS criteria1.
Fig 1.
PRISMA flow diagram.
Table 2.
Overview study and sample characteristics.
Table 3.
Age group-specific acceptance of nutrition and fitness apps (middle-aged/older adults vs. younger adults).
Table 4.
Fitness and nutrition app acceptance investigated by the qualitative study by Cabrita et al. [55].
Table 5.
Fitness app acceptance investigated by the qualitative study by Wichmann et al. [53].