smartphone app

For contact tracers of sexually transmitted infections, telephones and text messages have become ineffective. Dating apps increasingly are their best bet for informing people of their exposure risks.

Health data can be shockingly available. A group of nonprofits and corporations is proposing to patch up the holes in health apps, but many of the biggest companies didn’t participate in the proposal’s creation.

The condom, the pill and now, the smartphone? Natural Cycles, a mobile fertility app, this month became the first ever digital contraceptive device to...