Don't use this App for medical decisions. It comes with absolutely no warranty. Use it at your own risk!

Nightguard is an app that displays your blood glucose values from the Nightscout backend.

It is a native iOS App with support for the Apple Watch.
Features are:
- Define a range of acceptable blood glucose values.
- Whenever your values are out of range you will be alerted.
- You can snooze the alerts all the time and for a defined time period.
- You can reactivate the alerts all the time.
- You can activate alerts if the values are rising or falling too fast.
- The app displays yesterdays values as an overlay chart. This way you have a hint about how your values could behave in the future.
- Tune your basal rates with the statistics function to overlay different days

For the alarms to work the app has to be active. So you can enable a screen lock that keeps the app running all night long.

Have a look at for more information about how to setup your own Nightscout backend.

What’s New

Version 3.1.3


Support for these watches will be closed by this version. The UI of the App is renewed to Swift-UI and therefore
Apple has no more support for these type of watches. Sorry!

But you can try to stay on V3.1.0 as long as you can...

- Small visualization fix of persistent high values in mmol.
- Workaround the nightscout bug, that bgdelta is returned as mmol instead of mgdl

- Fixes a problem with always playing "high bg" alarms if using mmol.
- Optimized layout on the apple watch

- As promised: Know the very first Apple Watch Series 0 should really work (for a last time) with V3.1.1
Special release for francy ;-) .

- Reservoir Level is displayed on phone and watch now
- Bringing some color to the lives of mmol users ;-)
- Works around a bug in Nightscout 13.x.x. Hopefully better recognition of mmol usage
- added haptic for the alarm sliders
- Fixed some mmol problems regarding notifications

- Fixed some visualization problem for certain users
- Temporary Targets should be displayed as mmol now (if mmol is the preferred unit)
- The cannula age will now be queried for the last 5 days. I think everyone will have to change it till then, right ;-)

- Fixed a crash that happened for certain users

- added Careportal data to the main screen:
- Sensor-Age
- Cannula-Age
- Battery-Age
- and Pump Basal Rate Data
- Added Carbs-on-Board (cob)
- possibility to set temporary targets
- new green/yellow/red colors (thanks Gerrit!)
- more robust behaviour to distinguish between mgdl and mmol settings
- fixed the app badge visualization if you are using mmol settings
- provided a button to manually set the preferred display unit (mg/dl or mmol)
- the graphiccorner complication displays colored bg values now
- improved colors on the statistics view

- The nightscout web app can be opened using force touch on the target button now.
- All alarms can be disabled with just one click.

Ratings and Reviews

4.3 out of 5
26 Ratings

26 Ratings

karlhofgm132 ,

Zugriffstoken nicht möglich

Leider stürzt die App ab sobald versucht wird über eine Token-URL eine Verbindung aufzubauen. Gibt es dafür einen Workaround?

Developer Response ,

Token URLs werden derzeit leider nicht unterstützt. Für einen Workaround siehe hier:

Ninifee06 ,

Seit dem letzten Update echt perfek!

Es ist echt genial, was mit dem letzten Update alles in diese App eingebaut wurde!
Ich bin echt begeistert! Wenn jetzt jede Änderung auch auf der Watch angezeigt werden würde (also alle 5 Min.), dann wären alle meine Wünsche erfüllt.
Euch allen, die ihr Nightscout mitgestaltet und immer weiter verbessert, sage ich heute meinen herzlichsten Dank! Es ist irre, was ihr alles geschafft habt!

Developer Response ,

Hi Ninifee! Danke für die neue Bewertung. Du meinst bestimmt die Änderung in der WatchOS Complication. Die Updatehäufigkeit der Daten wird leider von Apple reglementiert. Hier gehen nach meiner Erfahrung nur 4 Aktualisierungen pro Stunde. Alternativ kann man aber die eigentliche Nightguard WatchOS App im Vordergrund lassen. Dann sollten jederzeit die neuen Werte angezeigt werden.

-Sugar1909- ,

Super App!

Inzwischen hat die App für meine Zwecke (AAPS-L**p-Nutzer, Anzeige der Werte für iOS über Nightscout) Sp*** abgelöst.

Wenn es jetzt noch die Kalender-Integration für eine bessere Watch-Komplikations-Implementierung gibt, vergebe ich den virtuellen 6. Stern ⭐️

Danke 🙏


etrada GmbH
31.5 MB

Requires iOS 12.0 and watchOS 4.3 or later. Compatible with iPhone, iPad, and iPod touch.


English, Finnish, German

Age Rating
Frequent/Intense Medical/Treatment Information


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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