This is by far, my all-time favorite app. Im a second yr FP resident and have been using it since med school. I use it nearly daily (or continually when on peds rotations). I recommend it to my fellow residents and to any med students Im mentoring. It has wt based dosing for IV and PO, and tells me how many mLs (not just mg for PO) which is great or even how many total mLs needed to complete a PO course of abx. It will graph bilis and link to recommendations. Love the age calculator and %change weight calculator! It will graph growth curves and give BP percentile (who likes looking up BP normal ranges?!? Its painful.). It will calculate IV bolus volumes and maintenance rates (I use this for adults too since it has that option). I think it does a lot of other stuff and has useful resource links too, but this is the stuff I use most often. Just realized today when reading through reviews that it has all the Pals drugs listed in a separate section, and that you can search drugs by generic. Love it even more now. I was always frustrated by the brand names in the scroll list. Not sure why I never thought to search before.