Potentially useful app that calculates many emergency/urgent doses of drugs and fluids for children. It also gives normal ranges of vital signs at various ages - useful! If the child's weight is not known (which many carers do not) you can input age or height. Inputting weight, age or date of birth to calculate age is very easy. Overall the user interface is easy to use. Drug doses from height/length are calculated from the Broselow tape criteria. Weight is estimated using the (3x age)+7 formula - OK for the heavy (obese) USA population, and becoming increasingly more appropriate in Europe. However note that if your colleagues have used the still more common 2x(age+4), you'll get get slightly different answers. A problem for non-USA users is drug naming, a mixture of USA trade names and generic names. Narcan is understandable in the UK, but you might get blank looks if you prescribed 'Solumedrol'. Defining hypoglycaemia as a blood glucose of <50mg/dl is unhelpful where blood sugars are reported in mmol/l. 'Succhinylcholine' and 'nebulyzed' are spelling errors that suggest slightly sloppy proof reading. Overall I think this has good potential, but has not quite got there yet for those of us outside N America. So only 2 stars at present, but more for future versions I hope.