The motivation to program EasyFPU was to ease the calculation of Fat-Protein-Units especially for children with Type 1 Diabetes.
Although carbs are as well calculated, this can be done by many apps today. However, meals with a high portion of fat or protein lead to a late increase in blood glucose. Modern pump therapies can counter this by a delayed bolus. The calculation of the amount of FPUs and the corresponding absorption time is not trivial - and this is exactly what this app is doing.
The concept is simple: The user picks one or more food items from a list and enters their amount - optionally he can pick one of max. three pre-defined typical amounts. With this information the app will calculate FPUs.
Before being able to use the app, the user (or the user’s parents) need to invest a bit of time and effort to define the food items. The food list is deliberately empty when first installing the app, as every user has his own preferred food (sample data may be downloaded from the app website). You may limit your food list to food with a high fat or protein portion, like pizza, McDonals food, etc.