Continuous Glucose Monitor. A device that is attached to your body, continuously measures your blood glucose levels, and reports them to your iPhone. Popular CGM’s include Dexcom and Abbot Freestyle Libre.

Blood Glucose. Measured in mg/dl or mmol/L depending on where you live.

Insulin Sensitivity Factor. A number that defines how much your BG will fall if you add 1 unit of insulin. Also referred to as “correction factor”.

Carb Ratio. A number that defines how many grams of carbohydrates are handled by 1 unit of insulin. Also referred to as “ICR” or “Insulin to Carb Ratio”.

Total Daily Dose of insulin, including both basal and bolus.

Insulin On Board. The amount of insulin that is active in your body, in addition to your basal rate.

Carbohydrates On Board. The amount of carbs active in your body.

Dynamic Insulin Sensitivity Factor and Dynamic Carb Ratio. If you activate these features, iAPS will dynamically change your ISF and CR based on aggregated data, but limited by your settings.

The Dynamic ISF feature can use two different approaches to adjusting your ISF. Please read the documentation and watch the Loop & Learn videos about dynamic features before turning on these features.

Super Micro-Bolus. In the iAPS app, SMBs are used as a more effective way to administer insulin and an alternative to only using temporary basals. They are small boluses given as needed every 5 minutes.

UnAnnounced Meal boluses, also called UAM SMB. These are SMBs given when unanticipated glucose is present in your cgm readings. iAPS assumes faster than expected rises is blood sugar are due to unannounced meals and/or inaccurate carb entries. This is a more aggressive adjustment only used when the difference in predicted bg and actual bg reaches a certain threshold.