Table 1.

Application features categorized by the Practical Reviews in Self-Management Support (PRISMS) taxonomy.

Taxonomy item and app features		Apps, n
Information about condition and/or its managementa
	News about blood pressure (BP), diet advice, what qualifies as high BP, home monitoring and diagnosis of BP, specific advice for BP during pregnancy	30
Information about available resources
	Providing links to WebMD, American Heart Association, NHSb information pages, and other associations	2
Provision of/agreement on specific clinical action plans and/or rescue medication
	Action plan (eg, personalized agreement on what to do if BP is high/low)	1
Regular clinical review
	Manual input of appointment details (eg, date and location)	2
	Booking appointments	3
Monitoring of condition with feedbacka
	Logging systolic/diastolic BP, heart rate, medication taken, and free-text notes	70
	Nonvalidated and likely misleading measuring of BP (via camera)	3
	Nonvalidated and likely misleading measuring of BP (via fingerprint)	3
	Voice assistant to support logging activities such as making and sending logs	3
	Sending logs (xls/db/PDF) via email; saved in Dropbox, Google Drive, SD card); share logs via portal	58
	Sending logs by using the app portal, SMSc, email, or via an automated telephone call; data transferred to GPd systems such as Egton Medical Information Systems Web and SystemOne	2
	Showing logs on charts (pie chart, line chart) only	37
	Providing observations such as your BP hasn't varied a lot in the last months, your BP is normal, you are stage 2 hypertension.	8
	Providing simple advice and suggesting actions such as condition: stage 2 hypertension; to do: you may have high blood pressure, change your lifestyle - see your doctor, aim for a total blood pressure less than 120/80 mmHg, avoid Tobacco, etc, hypertensive urgency - please go to the hospital!, your blood pressure is dangerously high. See your GP urgently or call 111 for more advice.	7
	Showing logs on colored chart/bar/points to indicate hypertension (stage 1), hypertension, prehypertension, normal and low BP	30
	Showing the person’s BP at different times of the day in different places	1
	Showing the number of days that meet the preset optimized BP value	1
Practical support with adherence (medication or behavioral)
	Medication reminder	11
	Points/rewards to encourage logging	5
Provision of equipment
	Use the proprietary or Bluetooth smart meter to log systolic/diastolic/pulse/heart rate	19
	Connecting to activity tracker gadgets or smart watches	16
Provision of easy access to advice or support when needed
	Web doctor consultation	1
	Communication via texting	1
Training/rehearsal to communicate with health care professionals
	Personal health record accessible to health care professional to enhance discussions or providing patient access to health record	6
Training/rehearsal for everyday activities
	Not applicable	0
Training/rehearsal for practical self-management activities
	Tagging logs to help users to understand what causes their high BP (eg, add tag before eating)	3
	Logging reminder to train users to make regular logs for monitoring	10
	Entering personal health profile, preparing for emergency conditions	2
	Ordering repeat prescriptions	1
	Emergency call to GP	1
Training/rehearsal for psychological strategies
	Using breathing exercises to relieve stress to lower BP	5
Social support
	Forum to share stories or advice about BP management	3
Lifestyle advice and supporta
	Providing DASHe/low sodium diet advice/videos to lower BP, advice on exercise intensity, lifestyle factors that cause high BP, managing stress, breathing exercises, relaxing games to lower BP	54
	Importing and showing weight data and sleep duration from another app (Weight Companion, Sleep as Android, MyFitnessPal, Google Fit, Samsung Health)/other third-party apps	7
	Sending messages to users via WhatsApp and Skype	1
	Log exercise intensity, BMI, and diet - make a note of the measurements, which may be associated to the HBPf	10
	Activity tracking (bicycle/steps) via Fitbit alongside blood pressure monitoring	20

^aTop 3 common BP self-management supports found in the apps.

^bNHS: National Health Services.

^cSMS: short message service.

^dGP: general practitioner.

^eDASH: Dietary Approaches to Stop Hypertension.

^fHBP: high blood pressure.