Nightguard is an iPhone app developed by etrada GmbH in the category of Education & Reference, specifically in the field of Medicine. This native iOS app allows users to view their blood glucose values from the Nightscout backend. It also offers support for the Apple Watch.

One of the main features of nightguard is the ability to define a range of acceptable blood glucose values. Whenever the user's values fall outside of this range, they will receive an alert. The app also allows users to snooze the alerts for a defined time period or reactivate them at any time.

In addition, nightguard offers the option to activate alerts if the blood glucose values are rising or falling too fast. The app provides a chart overlay of yesterday's values, giving users a hint about how their values could behave in the future. The statistics function allows users to overlay different days to fine-tune their basal rates.

Users also have the option to sync their blood glucose values to HealthKit, although this feature is optional.

Please note that nightguard should not be used for medical decisions and comes with no warranty. It is important to use it at your own risk.