# Virtual Ringelmann vs IP AE Carvalho

The clearest difference is update cadence: IP AE Carvalho at every 10 days against Virtual Ringelmann's monthly. IP AE Carvalho also leads on iOS requirement (12.0 vs 15.0). 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.

Virtual Ringelmann ships an update monthly, IP AE Carvalho every 10 days. The most recent releases landed on October 15, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Virtual Ringelmann | IP AE Carvalho |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 10 days** |
| Monetization | Free | — |
| Size | 73 MB | 37 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | +4 |
| Developer | [ACT Sistemas LTDA](https://appshunter.io/developer/1569392578) | [Dzigne Sistemas e Tecnologia LTDA ME](https://appshunter.io/developer/650792218) |

## What reviewers say

### Virtual Ringelmann

[App page](https://appshunter.io/ios/app/virtual-ringelmann/id1569392576)

This app aids in black smoke inspections by virtualizing the Ringelmann Scale methodology through your device's camera. It streamlines the process for assessing emissions from diesel engines and industrial chimneys, supporting environmental compliance and decision-making.

**Highlights:** Virtual Ringelmann Scale measurement, Supports vehicular and stationary surveillance, Automatic pollution index identification, Generates photographic evidence, Web portal integration for reports, Historical data logging

**Features:** macOS Compatibility

**In-app purchases:** none


### IP AE Carvalho

[App page](https://appshunter.io/ios/app/ip-ae-carvalho/id6752633309)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Virtual Ringelmann free?

Virtual Ringelmann is free to download, with no in-app purchases.

### Is IP AE Carvalho free?

IP AE Carvalho is free to download, with no in-app purchases.

### Do Virtual Ringelmann or IP AE Carvalho have ads?

Neither Virtual Ringelmann nor IP AE Carvalho shows ads.

### Which is updated more often, Virtual Ringelmann or IP AE Carvalho?

Virtual Ringelmann ships an update monthly, and IP AE Carvalho every 10 days. Most recently, Virtual Ringelmann was updated on October 15, 2026 and IP AE Carvalho on October 12, 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.*