An excellent but often missed feature of iPhone:
You can save your important health information like allergies, medical conditions, next of kin and contact numbers in your “Medical ID”. This information is available in an emergency without a third party person having to unlock your iPhone.
Open your ‘Health App’ and tap ‘Medical ID’ (bottom right corner). Complete all the info as required.
In an emergency:
With your iPhone locked swipe right where you would enter your security number. You will see bottom right ‘Emergency’. Tap and you will see it offers your Medical ID for someone to view.
iPhone (iOS 8 and later). Pin lock or fingerprint lock must be active.