CamAPS FX

How the algorithm works

CamAPS FX has four components:

• Dana pump or YpsoPump (with pre-filled pump cartridge)
• Dexcom G6 sensor or FreeStyle Libre 3 (with YpsoPump)
• An Android smartphone (not iPhone-enabled as of March 2025)
• The CamAPS FX app, which hosts the algorithm and connects to sensor and pump

Key principles of how the algorithm tends to behave:

• The algorithm auto-calculates basal rates and correction factors and delivers insulin as an extended micro-bolus every 8–12 minutes
• Insulin delivery increases when glucose is rising
• Insulin delivery decreases and suspends if glucose is predicted to go low
• The default target is 5.8 mmol/L (105 mg/dL), adjustable as low as 4.4 mmol/L (80 mg/dL) and as high as 11.0 mmol/L (198 mg/dL), in as many time blocks as needed — giving substantial flexibility

Starting settings

The algorithm needs your weight, average total daily insulin dose, and carbohydrate ratios. It then calculates the rest — including active insulin time and carbohydrate-on-board time — and continuously adapts.

Having the pump’s basal rates, correction factors, and carbohydrate ratios kept current is recommended for situations requiring a return to manual mode.

Once the above is set, the most common ongoing adjustments are carbohydrate ratios and target levels, depending on your time in range.

Starting an AID system can be divided into two phases:

Download the How to Survive and Thrive Guide — CamAPS FX summary.

Tips and practical approaches

Strong time in range on CamAPS FX tends to combine the algorithm with good underlying habits:

• Three balanced meals
• Accurate carbohydrate counting
• Bolus insulin 10–20 minutes before eating
• Being active for 10–15 minutes after eating
• Rotating cannula sites

Follow these and you may find: 99 Problems But Highs Ain’t One (download/share)

Other practical points to be aware of:

• Enter hypo treatments in the “Add meal” feature under “Hypoglycaemia treatment”
• Suspending the pump when disconnecting (showers, sport, and similar) is the recommended approach per device guidance
• The Android phone is designed to work within about six metres of the pump — a waistband or pocket close to the body is a common approach
• Having pump settings — basal rates, correction factors, carbohydrate ratios, and target levels — kept current is recommended for use outside automated mode

Preventing and managing hypos

The algorithm tends to prevent many overnight hypos, but hypos will still occur — particularly if bolus insulin is too high or exercise is unplanned.

Hypo treatment amounts often need to be smaller than before AID, because the algorithm may have already reduced or stopped insulin for 30 minutes or more.

It is also worth considering a pre-emptive response if glucose is 4.0–6.0 mmol/L (70–110 mg/dL) and trending down.

The hypo guide below is based on weight — example shown is for a 30 kg person. The Survive and Thrive Guide — CamAPS FX lets you enter your weight to generate a personalised chart.

Download the CamAPS FX hypo chart to use directly.

High-fat meals

From the Mealtime Insulin Guide, we know that high-fat meals with carbohydrates (pizza, takeaways) tend to need additional insulin due to delayed gastric emptying.

CamAPS FX auto-calculates active insulin and carbohydrates on board, which makes it relatively good at responding to delayed rises after high-fat meals.

Exercise

There is a quick method and a more comprehensive planned method.

The quick method

Turn on “Ease Off” before starting exercise — ideally 90 minutes beforehand. Then take small carbohydrate top-ups every 20 minutes as needed.

Avoid large carbohydrate loads all at once — glucose may spike, triggering extra insulin and increasing hypo risk.

How many grams every 20 minutes? It depends on body weight. The example below is for a 50 kg person. The Survive and Thrive Guide — CamAPS FX lets you enter your weight to generate a personalised chart.

Download the exercise charts: mmol/L version and mg/dL version.

The comprehensive planned method

To use this approach, work through the Exercise Guide to understand exercise types, bolus reductions, and how to adapt plans after trials.

The T25/T25 table below tends to make more sense once you have read the exercise guide. The AID and Exercise Consensus Guideline is also worth reading — the infographic under the T25/T25 grid is especially useful.

This downloadable exercise planning tool for CamAPS FX makes creating and adapting exercise plans easier.

Explore the algorithm

The AID System Explorer generates exploratory output ranges for CamAPS FX based on your TDD, weight, and responsiveness level. The detailed explainer explains how CamAPS uses lower targets and higher algorithm-delivered insulin to increase responsiveness — the same optimisation strategy as Control-IQ, with a different mechanism.