This document discusses developing mobile apps with security in mind from the start. It notes that considering security early in the design process is cheaper, easier and less likely to result in fundamental flaws compared to addressing security as an afterthought. While building security into apps from the beginning requires more initial effort, it can improve user experience and privacy, lead to more integrated and upgradable security, and provide better ROI long term compared to last minute approaches. When using commercial off-the-shelf apps, gaining security assurances can be challenging and often relies on black box assessments rather than code access. Proper response planning is also important in case issues arise.