Table 2.

App quality mean scores across the 4 Mobile App Rating Scale sections and total (out of 5).

		Engagement	Functionality	Aesthetics	Information	Total
Overall mean (SD; range)		2.94 (1.08; 1.2-4.8)	4.23 (0.62; 3.25-5)	3.40 (1.25; 1.33-5)	3.23 (0.98; 1.5-4.6)	3.45 (0.84; 1.95-4.69)
App name
	Narcolepsy Monitor	4.80	4.75	4.70	4.50	4.69
	Cure SMA guide	4.60	5.00	4.70	4.40	4.68
	Cystic Fibrosis Manager	4.60	4.75	4.70	4.00	4.51
	Project Breathe or Breathe RM	3.80	4.75	5.00	4.00	4.39
	RarePulse	4.40	4.75	3.67	4.60	4.36
	PatientMpowerment for CF	3.80	5.00	4.67	3.75	4.30
	RareGuru	3.8	4.50	4.33	4.00	4.16
	MicroHealth Hemophilia	3.60	4.25	5.00	3.50	4.09
	Cystinosis & me	4.00	4.50	3.67	4.00	4.04
	Spina Bifida Association	2.40	5.00	4.67	3.83	3.98
	HaemActive	2.60	4.75	5.00	3.50	3.96
	PBC Health Storylines	3.80	4.00	4.00	3.33	3.78
	ThalTracker	2.60	4.25	4.33	3.86	3.76
	CANrecall	2.60	4.25	3.67	4.00	3.63
	THALIA app	3.20	3.75	3.00	4.00	3.49
	VASCERN app	2.20	4.00	3.67	4.00	3.47
	ThaliMe	3.40	3.50	3.67	3.00	3.39
	Cystic Fibrosis Downhill	3.40	4.00	3.67	2.00	3.27
	Cystic Fibrosis: A Pocket Guide	2.40	3.75	3.33	3.17	3.16
	PH Aware	2.80	3.33	2.33	4.00	3.12
	Haemophilia Pal	2.60	4.00	3.00	2.50	3.03
	MyHemophiliaTeam	3.20	3.25	2.67	2.75	2.97
	Autogenic Drainage	2.60	4.00	2.00	2.50	2.78
	Recognize Amyloidosis Disease	1.40	5.00	1.33	2.00	2.43
	Recognize Thalassemia Disease	1.40	5.00	1.33	2.00	2.43
	Easy Diagnosis- Thalassemia	1.20	5.00	1.33	1.60	2.28
	Narcolepsy Disorder	1.40	3.25	1.67	1.67	2.00
	Hemophilia Disease	1.40	3.25	1.67	1.67	2.00
	Thalassemia Disease	1.40	3.25	1.67	1.50	1.95