# Carvolution | Car Subscription vs ISS calculator

The clearest difference is update cadence: ISS calculator at every 3 days against Carvolution | Car Subscription's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

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

Carvolution | Car Subscription ships an update every 3 weeks, ISS calculator every 3 days. The most recent releases landed on October 10, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Carvolution | Car Subscription | ISS calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/iss-calculator/id1531086115/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | — | Free |
| Size | 55 MB | 2 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Carvolution AG](https://appshunter.io/developer/1443473682) | [Sujal Adhia](https://appshunter.io/developer/1475334795) |

## What reviewers say

### Carvolution | Car Subscription

[App page](https://appshunter.io/ios/app/carvolution-car-subscription/id1437063633)

**Features:** macOS Compatibility

**In-app purchases:** none


### ISS calculator

[App page](https://appshunter.io/ios/app/iss-calculator/id1531086115)

This tool helps assess the severity and extent of ichthyosis across the body. It's designed for clinical trials, research, and practice to track treatment response in adults and children. The system follows FDA guidelines for comprehensive scoring.

**Highlights:** Assess ichthyosis extent and severity, User-friendly instrument, For clinical trials and research, Track treatment response, Score adults and children, Follows FDA guidelines

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Carvolution | Car Subscription free?

Carvolution | Car Subscription is free to download, with no in-app purchases.

### Is ISS calculator free?

ISS calculator is free to download, with no in-app purchases.

### Do Carvolution | Car Subscription or ISS calculator have ads?

Neither Carvolution | Car Subscription nor ISS calculator shows ads.

### Which is updated more often, Carvolution | Car Subscription or ISS calculator?

Carvolution | Car Subscription ships an update every 3 weeks, and ISS calculator every 3 days. Most recently, Carvolution | Car Subscription was updated on October 10, 2026 and ISS calculator on September 22, 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.*