# C3 Wave™ vs CVR Calc

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.

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

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.

## The numbers

| Metric | C3 Wave™ | CVR Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.3 (27 ratings)](https://appshunter.io/ios/app/cvr-calc/id1423744026/reviews)** |
| Number of ratings | — | **27** |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 8 months |
| Monetization | — | Free |
| Size | 46 MB | 4 MB |
| Requires iOS | **8.0** | 18.5 |
| Devices | iPad | **iPhone, iPad, Mac** |
| Age rating | 17+ | 4+ |
| Developer | [AngioDynamics](https://appshunter.io/developer/1485461056) | [Global Vascular Access, LLC](https://appshunter.io/developer/1423744025) |

## What reviewers say

### C3 Wave™

[App page](https://appshunter.io/ios/app/c3-wave/id929564632)

**In-app purchases:** none


### CVR Calc

[App page](https://appshunter.io/ios/app/cvr-calc/id1423744026)

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:** Vision Pro support

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*