BolusCalc

Name: BolusCalc
Rating: 3.8 (18 reviews)
Author: BC Children's Hospital

Insulin Bolus Calculator

Free · Designed for iPad

18 Ratings
Ages

16+
Years
Category

Medical
Developer

BC Children's Hospital
Language

EN
English
Size

68.3
MB

his app is designed for simple calculations of insulin doses in the Canadian home and school setting (although calculations can also be done in U.S. mg/dL blood glucose units). There are 4 screens available: The “Simple Insulin Bolus” screen calculates an insulin dose for people on multiple daily injections (MDI) based on carb ratio, correction/sensitivity factor (ISF), target BG (the default is 6 mmol/L or 100 mg/dL for daytime, and 8 mmol/L or 120 mg/dL for bedtime), carbs to be consumed, and current BG. The “Simple Insulin Scale” screen generates a simplified insulin sliding scale for people who are on a fixed dose of carbs at a meal, based on baseline insulin dose, ISF, and target BG. The “Full Sliding Scale” screen generates a full insulin scale for people on MDI based on carb ratio, ISF, and target BG. The “Correcting for Arrows” screen allows CGMS users to calculate an increase or decrease in insulin dose (or carbs) to account for positive or negative direction arrows.

Ratings & Reviews

3.8

out of 5

18 Ratings

Simple, easy to understand
04/17/2025

cutes22
I like that it’s set up for three different methods of calculation depending on your insulin sensitivity at various times of the day. I also like that it saves your settings instead of re-entering them every time. Would love an and be willing to pay a decent amount for IOB and exercise adjustment to be included as well as it keeping your records permanently in the app for your review. I had the Rapid Calc app but lost it when I got a new phone and it’s no longer available in the USA App Store. I’m dying for someone to duplicate it. But in the meantime, this is about the best anyone has to offer here in the US App Store,not to mention, it’s free with no adds. Can’t beat that.

Developer Response
Thanks for your positive review! In terms of IOB, there are a number of ways to calculate this, all very empirical, and really none of them are perfect. This would then also require users to enter the type of insulin and the time they gave the last injection, but the system wouldn't be able to track more than one injection at a time.
Simple, easy to understand
04/17/2025

cutes22

I like that it’s set up for three different methods of calculation depending on your insulin sensitivity at various times of the day. I also like that it saves your settings instead of re-entering them every time. Would love an and be willing to pay a decent amount for IOB and exercise adjustment to be included as well as it keeping your records permanently in the app for your review. I had the Rapid Calc app but lost it when I got a new phone and it’s no longer available in the USA App Store. I’m dying for someone to duplicate it. But in the meantime, this is about the best anyone has to offer here in the US App Store,not to mention, it’s free with no adds. Can’t beat that.
Developer Response 05/19/2025
Thanks for your positive review! In terms of IOB, there are a number of ways to calculate this, all very empirical, and really none of them are perfect. This would then also require users to enter the type of insulin and the time they gave the last injection, but the system wouldn't be able to track more than one injection at a time.
Add the 4 separate meals back
06/05/2024

Saunwalk
I’ve been using this app for years and my daughter recently downloaded this on her phone and ours is different mines has 4 separate meals which is great because her ratios are different. But her app only has 1 setting and it’s not helpful please bring the 4 different settings back breakfast lunch dinner bed

Developer Response
Hi there, that option is still there. You just have to click on the wheel icon on the Home screen, which brings you to the Setting screen. Then just choose "Meal-Specific (4)" under the "Set # of Bolus Parameters" heading.
Add the 4 separate meals back
06/05/2024

Saunwalk

I’ve been using this app for years and my daughter recently downloaded this on her phone and ours is different mines has 4 separate meals which is great because her ratios are different. But her app only has 1 setting and it’s not helpful please bring the 4 different settings back breakfast lunch dinner bed
Developer Response 01/13/2025
Hi there, that option is still there. You just have to click on the wheel icon on the Home screen, which brings you to the Setting screen. Then just choose "Meal-Specific (4)" under the "Set # of Bolus Parameters" heading.
Easy to use but…….
08/06/2025

Linder52
I’ve been using this app for almost two years—my endocrinologist set it up for me instead of using a printed graph. This is always on my phone and easy to see. But I only have one screen, the app shows 4. Also, the military time is incorrect. Can I change it to regular time? How do I update to 4 screens?Thanks for an easier way to calculate insulin.

Developer Response
Hi there, to be able to show 4 mealtimes, go to the Settings screen (the cogwheel icon on the Home screen, and under "Choose # of Bolus Parameters", pick "meal-specific (4)" and then exit the screen. The military time is from your phone.
Easy to use but…….
08/06/2025

Linder52

I’ve been using this app for almost two years—my endocrinologist set it up for me instead of using a printed graph. This is always on my phone and easy to see. But I only have one screen, the app shows 4. Also, the military time is incorrect. Can I change it to regular time? How do I update to 4 screens?Thanks for an easier way to calculate insulin.
Developer Response 11/13/2025
Hi there, to be able to show 4 mealtimes, go to the Settings screen (the cogwheel icon on the Home screen, and under "Choose # of Bolus Parameters", pick "meal-specific (4)" and then exit the screen. The military time is from your phone.
Good app but has been getting stuck
02/08/2023

MomReynolds
We’ve used this app for quite awhile now but for the past month or so it’s been getting “frozen”. I have to close out everything and start over. Is there a fix for this?
Good app but has been getting stuck
02/08/2023

MomReynolds

We’ve used this app for quite awhile now but for the past month or so it’s been getting “frozen”. I have to close out everything and start over. Is there a fix for this?

Have added the ability to convert an insulin scale created on the “Full Insulin Scale” screen to PDF.

Version 2.1.1

8h ago

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