British Heart Foundation - home blood pressure monitoring diary. Send to patients with home BP machines - gives all the instructions. They can then drop readings in, or send in the average reading.
BlueIce is a prescribed evidence-based app to help young people manage their emotions and to reduce urges to self-harm. It includes a mood diary, toolbox of evidence based techniques to reduce distress and automatic routing to emergency numbers if urges to harm continue.
Information about how to check your peak flow and how to complete a peak flow diary. The Asthma and Lung UK website more broadly has a lot of information about different lung conditions, and a helpline with trained staff who are able to provide advice about management of different lung conditions.