Comparison

Dexcom Clarity vs BolusCalc

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Dexcom Clarity

This app provides diabetes management insights for continuous glucose monitoring (CGM) users. It helps identify glucose patterns and trends over time, aiding in better diabetes control and potentially increasing time in target glucose ranges. Users can track key metrics, share data with healthcare providers, and set personalized goals.

Highlights
  • Glucose pattern and trend analysis
  • Time in range tracking
  • Data sharing with healthcare professionals
  • Setting Time in Range goals
  • Report viewing, saving, printing, and emailing
  • Notifications and email alerts
Currently charting
Read full description

Dexcom Clarity is a diabetes management application for CGM users. It provides relevant insights into users’ retrospective glucose values, patterns, and trends over time. Dexcom Clarity is an important part of your Dexcom CGM system. It can help you identify glucose patterns and, with your healthcare professional, determine the potential causes of those patterns. Dexcom Clarity users experience up to 15% increased time in range (70-180mg/dL) as compared to non-users.* Log in with your Dexcom account to: • Keep tabs on your time in range, patterns and other key metrics. • Allow clinics to access to your data and reports to make appointments more efficient. • Set Time in Range goals. • Turn on daily or weekly notifications and emails. • View, save, print, and email all reports. • Connect to partner apps for more features and benefits. This app store should not be used as your first point of contact to resolve technical or customer services issues. In order to protect your privacy and personal information, and promptly resolve any technical or customer services issues you are having with any Dexcom product, please contact 1-888-738-3646. Dexcom is required to follow up with customers regarding product-related complaints. If Dexcom determines that your comment/complaint requires follow up, a technical support representative will attempt to contact you to gather more information regarding your comment/complaint. *Parker AS, Welsh J, Jimenez A, Walker T. Insights from big data (2): Benefits of self-guided retrospective review of continuous glucose monitoring reports. Diabetes Technol Ther. 2018;20(S1):A-27.

About

BolusCalc

This app assists with calculating insulin doses for individuals managing diabetes. It offers features for simple bolus calculations, insulin sliding scales, and adjustments based on continuous glucose monitoring data. Supports both Canadian and U.S. blood glucose units.

Highlights
  • Simple insulin bolus calculation
  • Insulin sliding scale generation
  • Correction for CGMS arrows
  • Supports MDI users
  • Canadian and U.S. units
Features
Read full description

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.

Screenshots

Dexcom Clarity4 screens
BolusCalc4 screens

Verdict

The call

The clearest difference is rating: Dexcom Clarity at 4.6 against BolusCalc's 3.8. Dexcom Clarity also leads on ratings volume (13K vs 23) and chart position (#169 vs unranked). BolusCalc's advantage is update cadence (every 2 days vs every 3 months) and iOS requirement (15.1 vs 17.6). On price, review sentiment, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Dexcom Clarity holds the better App Store score, 4.6 against 3.8. That said, the two scores are not equally well evidenced: Dexcom Clarity has 13K ratings behind it against 23, so its average is the more settled of the two. Written reviews point the same way: 46% of Dexcom Clarity's written reviews are positive against 42% of BolusCalc's.

UpkeepUpdate frequency

Dexcom Clarity ships an update every 3 months, BolusCalc every 2 days. The most recent releases landed on September 24, 2026 and September 13, 2026 respectively.

Scorecard5 real differences · 6 level
Dexcom Clarity versus BolusCalc: the parameters behind the verdict, then further details
ParameterDexcom ClarityBolusCalc
PriceFreeFree
Rating4.6 (13K ratings) — better3.8 (23 ratings)
Positive reviews45.9% of reviews — better42.1% of reviews
Number of ratings13K — better23
Update frequencyEvery 3 monthsEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
Best chart rank#169 — better—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.615.1 — better
Further details — not scored
Size36 MB65 MB
Age rating4+17+
DeveloperDexcomBC Children's Hospital

Customer experience

Dexcom Clarity

All ratings12,930 ratings
Positive90.3%
Neutral3.5%
Negative6.3%
Written reviews307 reviews
Positive45.9%
Neutral13.0%
Negative41.0%

BolusCalc

All ratings23 ratings
Positive56.5%
Neutral30.4%
Negative13.0%
Written reviews19 reviews
Positive42.1%
Neutral42.1%
Negative15.8%

Bugs and requests

Dexcom Clarity

Reported bugs

4 issues
  • Reports not updating
  • Clarity app crashing
  • Sensor calibration issues
  • Data not syncing between apps

Requested features

5 requests
  • Ability to add personal notes
  • Customizable report formatting
  • More detailed data export options
  • Ability to adjust graph scales
  • Display daily high/low/average glucose

BolusCalc

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Dexcom Clarity

No in-app purchases

None

BolusCalc

No in-app purchases

Questions

Is Dexcom Clarity free?
Dexcom Clarity is free to download, with no in-app purchases.
Is BolusCalc free?
BolusCalc is free to download, with no in-app purchases.
Which has better reviews, Dexcom Clarity or BolusCalc?
Dexcom Clarity is rated higher. Dexcom Clarity averages 4.6 out of 5 from 13K ratings, while BolusCalc averages 3.8 from 23 ratings.
Do Dexcom Clarity or BolusCalc have ads?
Neither Dexcom Clarity nor BolusCalc shows ads.
Which is updated more often, Dexcom Clarity or BolusCalc?
Dexcom Clarity ships an update every 3 months, and BolusCalc every 2 days. Most recently, Dexcom Clarity was updated on September 24, 2026 and BolusCalc on September 13, 2026.

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