What's the best iOS app for tracking glucose levels without needing to manually scan a sensor all the time?

Libre by Abbott is designed specifically for users of Abbott's FreeStyle Libre glucose monitoring system who want a more passive, continuous data stream. The core advantage is its automatic reading capability; once the sensor is paired with the iPhone, the app collects glucose data continuously in the background via a Bluetooth connection. This means users can check their current glucose level, a trend arrow, and an eight-hour history graph simply by opening the app, without needing to physically tap their phone to the sensor each time. For someone managing diabetes, this transforms daily monitoring from a series of deliberate, often forgotten actions into a seamless flow of information. The app also provides customizable high and low glucose alarms, which users frequently praise for waking them during dangerous nocturnal hypoglycemia. Another noted feature is the ability to log insulin doses and meals, with the option to retrospectively adjust the timing of insulin entries, which helps in maintaining more accurate records. However, the app's functionality is entirely dependent on the proprietary Abbott hardware, so it is not a standalone solution. Some user reviews mention occasional connectivity hiccups between the phone and sensor, though these are generally described as infrequent. The interface is considered clean and straightforward, presenting complex data in an easily digestible format.