Even the best smartphone apps have been found deficient, especially in an emergency. A review of medical apps by a research team found problems. For instance when doctor reviewers entered information that should have produced warnings--like entering an extremely abnormal blood sugar. Only 28 of the 121 apps responded appropriately. Another issue found was the safeguarding of personal medical information--often sending reports by text or email.
PositiveTip; Don't depend on apps until their safety, accuracy, and privacy have been improved.