I'm putting this is AIBU for traffic and because of all the "should I call the emergency services?" threads on at the moment.
redcross.org.uk/app
There are two apps for first aid - adult and children&babies. Once downloaded they work without Wifi. They are free to download.
Once downloaded you can use them to update your first aid knowledge and use them if needed in an emergency situation.
Please tell everyone about them.
Thanks.