Comparison

C3 Wave™ vs CVR Calc

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

Head to head
About

C3 Wave™

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The C3 Wave™ assists in the placement of PICC catheters by medical professionals. It can be used by itself in "demo mode" for training and demonstration purposes, and pairs with hardware components available from Medcomp® to be used in live medical procedures. When used in demo mode, the app produces ECG waveforms that simulate a human patient. A slider control allows manual adjustment of the ECG wave to show waveforms present during a real PICC placement procedure. Snapshot images can be taken of the ECG wave in its various shapes to document the procedure. When used in live procedures, the same screen output and controls are present, but the ECG waves are real instead of simulated. Once all desired snapshots are captured and a procedure is finished, the user may export captured data to a wireless printer, web-based EMR (Electronic Medical Records) system, or share snapshot images saved to the iPad's photo album.

About

CVR Calc

This medical tool assists healthcare professionals in vascular access and infusion therapy by calculating catheter to vessel ratios. It helps clinicians quickly assess the area consumed within the intravascular space by catheters, supporting both venous and arterial devices.

Highlights
  • Catheter to vessel ratio calculation
  • Supports venous and arterial devices
  • Peripheral and central venous access device calculations
  • Area-based calculations for patient assessment
  • Uses ultrasound measurements for vessel size
  • Based on academic research and awards
Features
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CVRCalc was designed by clinicians, for clinicians — and is the tool for healthcare professionals who work in or perform Vascular Access and Infusion Therapy roles and want to monitor accurate catheter to vessel ratios. It is designed to calculate the area consumed within the intravascular space used by the catheter. The device can be used to calculate the area for both venous and arterial devices if preferred. This simple tool allows clinicians to make quick area-based calculations during the patient assessment process, along with using ultrasound to accurately measure the vessel size prior to the insertion of an intravascular device. It covers both peripheral intravenous devices (in both Gauge and French sizes) as well as central venous access devices (in French size only). Based on the 1st Place poster awarded at the Association for Vascular Access 2017 Scientific Meeting in Phoenix and supported with an academic publication, which can be found here - https://doi.org/10.1007/s11239-017-1569-y This App does NOT collect, record, store, or transmit any information entered, and is used to provide the mathematical catheter to vessel area-based calculations only.

Screenshots

CVR Calc3 screens

Verdict

The call

The clearest difference is device support: CVR Calc at 3 against C3 Wave™'s 1. C3 Wave™'s advantage is iOS requirement (8.0 vs 18.5). On price, update cadence, 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.

UpkeepUpdate frequency

C3 Wave™ ships an update every 7 months, CVR Calc every 8 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

Scorecard2 real differences · 8 level
C3 Wave™ versus CVR Calc: the parameters behind the verdict, then further details
ParameterC3 Wave™CVR Calc
PriceFreeFree
Rating—3.3 (27 ratings) — better
Positive reviews—33.3% of reviews
Number of ratings—27 — better
Update frequencyEvery 7 months — betterEvery 8 months
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPadiPhone, iPad, Mac — better
Requires iOS8.0 — better18.5
Further details — not scored
Size46 MB4 MB
Age rating17+4+
DeveloperAngioDynamicsGlobal Vascular Access, LLC

In-app purchases

None

C3 Wave™

No in-app purchases

None

CVR Calc

No in-app purchases

Questions

Is C3 Wave™ free?
C3 Wave™ is free to download, with no in-app purchases.
Is CVR Calc free?
CVR Calc is free to download, with no in-app purchases.
Do C3 Wave™ or CVR Calc have ads?
Neither C3 Wave™ nor CVR Calc shows ads.
Which is updated more often, C3 Wave™ or CVR Calc?
C3 Wave™ ships an update every 7 months, and CVR Calc every 8 months. Most recently, C3 Wave™ was updated on October 26, 2026 and CVR Calc on October 24, 2026.

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