While 59% (n = 27/46) of apps included a clinical disclaimer, only 30% (n = 14/46) documented the calculation formula. Searches identified 46 calculators that performed simple mathematical operations using planned carbohydrate intake and measured blood glucose. We performed a systematic assessment of all English-language rapid/short-acting insulin dose calculators available for iOS and Android. We explored the accuracy and clinical suitability of apps for calculating medication doses, focusing on insulin calculators for patients with diabetes as a representative use for a prevalent long-term condition.

Because self-medication errors are a recognized source of avoidable harm, apps that affect medication use, such as dose calculators, deserve particular scrutiny. However, there is little systematic evidence exploring possible risks associated with apps intended for patient use. Medical apps are widely available, increasingly used by patients and clinicians, and are being actively promoted for use in routine care.

Libre calculator