Table 4.

Search result half-life (t_½), app half-life, and the proportion of apps still available to download from the app stores at the end of the study, grouped by whether they were clinically relevant to depression.

Platform	Clinical relevance subgroup	Search result		Available to download
		t½	Apps remaining	t½	Apps remaining
Android	All	130 days	37.8%	>9 months	74.2%
	Relevant	>9 months	57.9%	>9 months	65.9%
	Not relevant	56 days	17.2%	>9 months	83.8%
iOS	All	>9 months	82.7%	>9 months	90.0%
	Relevant	>9 months	80.7%	>9 months	87.8%
	Not relevant	>9 months	84.4%	>9 months	91.9%