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Nightscout is an excellent tool for remotely viewing Loop's actions. It allows for easy remote monitoring of Loop activities, troubleshooting of Loop errors, history of CGM, carbs, boluses, & temp basals, reports analyzing data trends and patterns. Setting up a Nightscout site is fairly quick. Once set up, the site can be accessed by anyone that you share your unique Nightscout URL with. There is a Nightscout app in your iPhone App Store that allows you to view the Nightscout site after you've configured it, or you can use a web browser to view the data.

  • Nightscout is highly recommended for Loop users, especially those using Loop as caregivers
  • Nightscout displays are often the easiest way to troubleshoot Loop settings if you are having problems and seeking input from others
  • Nightscout provides reporting features for longer-term review and preparing information for your physician

Nightscout Documentation

There used to be a lot of Nightscout information found only in LoopDocs, but has now been transferred to updated Nightscout Documentation. The information that remains in LoopDocs is Loop specific. So you may be jumping back and forth between the two sets of documents.

  • If it says Nightscout in upper left you are in the Nightscout Site
  • If it says LoopDocs in upper left you are in the LoopDocs site
  • On your computer, open the Nightscout Documentation in a separate tab or window of your browser

Below is some general discussion about the Nightscout display, as well as some Loop-specific display information.


Blood Glucose

Your blood glucose (BG) readings from your CGM are shown in green, yellow, or red in the main graph area of NS. You can adjust your high and low BG targets in NS (when NS alerts will start for high/low BGs), but those will not affect your Loop performance. Loop only uses the BG targets given in the Loop app settings. The main screen of BGs is displaying the time duration you have selected (in the example above, 12 hours of BG history). The bottom of the screen shows the last 48-hours of BG trends. You can scan backward by dragging the bottom timeline to the left, if you want to review specific Loop actions or data in the last two days.


The SAGE, CAGE, and BAGE pills are for Sensor Age, Cannula Age, and (pump) Battery Age. These optional pills track the time since your CGM sensor, Pump site, and Pump battery were last changed. You can set up custom alerts to remind you when it is time to change the devices, or simply use the visuals to keep track of your particular timing for site/sensor changes. These fields will not auto-update from pump or CGM devices, instead you will have to update them using Nightscout Careportal so that the pill information is accurate.


Carbs are automatically uploaded to NS by the Loop app. The amount of carbs on board (active carbs or COB) can be seen by clicking the Loop pill. The size of a white carb dot on the graph is proportional to the amount of carbs entered...bigger meals get bigger dots. Loop does not read carbs from NS for use in looping calculations, it only uploads carbs to NS that have been entered in the Loop app.


Insulin boluses are also automatically uploaded to NS by the Loop app. The bolus is shown as a filled-in blue lower-half of the dot, and the specific amount of the bolus is also shown. There may be a slight delay between when the carbs for a meal are uploaded to NS to when the meal bolus appears. This is because depending on the pump model and size of bolus, the bolus may take a few minutes to actually be administered then Loop has to perform a pump read to verify the reservoir volume has decreased (i.e., the bolus was given). As shown in the example above, the meal carbs have been uploaded, but the bolus delivery is still in progress. Insulin on board (active insulin or IOB) is also shown in the Loop pill.

Temp Basals

Your current basal profile is automatically updated to NS whenever it is changed by Loop on your pump. The dashed blue line represents the scheduled basal profile (as entered in your NS profile). The solid blue lines indicate the actual basal amounts set for a given as Loop sets temp basals higher or lower than your scheduled basal rate, the solid blue line will jump above or below your dashed blue line. There is a slight delay (up to 2-5 minutes) in the rendering of basal changes on the blue lines, so if you want the accurate current basal rate, you can check the Loop pill.

Predicted BG

The purple line to the right of the BG is Loop's predicted BG. Watching the behavior of that purple line can help you understand why Loop is making decisions regarding high or low temps. You can read more on that topic in the Algorithm section of these docs. If you don't see the prediction (and all other NS and Loop settings are configured), tap on the 3 dots to the right of the 24 to reveal the choice to display AR2 prediction or Loop prediction. Adjust the check boxes to show just the Loop prediction.

Loop pill

The Loop pill is the little display box which, when hovered over or clicked, will provide additional information about recent Loop activities and status. Information included is the last time Loop ran, the temp basal set, IOB, and COB. Looking at the Loop pill is a quick method for assessing if you loop is currently active, as well.

Loop Pill status indicator symbols

X   Error in Loop

ϕ   Recommending basal, but not enacting (open loop or pump suspended)

  Enacted a new temp basal

  Loop is continuing with last temp basal, no change

  Warning indicating Loop is either red or has failed to upload to Nightscout for a longer period of time.

Mouse over or Touch the Loop pill to view a tool tip containing one or more of the latest status messages. The most up-to-date NS also includes information in the Loop pill for the minimum and maximum predicted BG, eventual and predicted BG.


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