The SHINE study aims to gather data on the evolution of participant's blood pressure and to correlate this with demographic, lifestyle and health factors in a hypertensive population as well as, to gather data on participants' perception of the device under test (Aktiia 24/7).

Inclusion Criteria:

1. Adult participants aged 22 to 85 years old

2. A participant whose last blood pressure reading was within the last 12 months and was either:

   1. SBP ≥145
   2. or ≥DBP 90

3. People who use either an iOS or Android smartphone

4. People who have 2 arms

5. Able and willing to provide informed consent and to adhere to study procedures.

Exclusion Criteria:

1. Participants whose BP data submitted is >180 mm Hg systolic OR >120 mm Hg diastolic .

2. Participants with a self-reported known diagnosis of

   1. atrial fibrillation
   2. congestive heart failure
   3. heart valve disease
   4. pheochromocytoma
   5. Raynaud's disease
   6. arm lymphedema

3. Participants who take insulin

4. Participants who are on hemodialysis

5. Women who are self-reported to be pregnant

6. Participants whose arms shake uncontrollably or are paralyzed (cannot move)

7. Participants with upper arm circumference <22 cm or >42 cm

8. Participants with wrist circumference >23cm

9. Participation in another interventional clinical study or use of investigational drugs in the last 30 days.

The final study population should cover the following phenotypes:

• Close to 50% females and 50% males,
• At least 20% of non-Caucasian participants,
• At least 20% of participants with Systolic Blood Pressure (SBP) ≥150mmHg (assessed at baseline via the study device).