# CSIA vs ChimnPro

CSIA and ChimnPro are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

CSIA ships an update every 4 months, ChimnPro every 2 months. The most recent releases landed on October 6, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | CSIA | ChimnPro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Size | 37 MB | 32 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [The Chimney Safety Institute of America](https://appshunter.io/developer/1478917352) | [Allan Machado](https://appshunter.io/developer/1874113635) |

## What reviewers say

### CSIA

[App page](https://appshunter.io/ios/app/csia/id1478917353)

**Features:** macOS Compatibility

**In-app purchases:** none


### ChimnPro

[App page](https://appshunter.io/ios/app/chimnpro/id6787178184)

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

**In-app purchases:** none


## Frequently asked questions

### Is CSIA free?

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

### Is ChimnPro free?

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

### Do CSIA or ChimnPro have ads?

Neither CSIA nor ChimnPro shows ads.

### Which is updated more often, CSIA or ChimnPro?

CSIA ships an update every 4 months, and ChimnPro every 2 months. Most recently, CSIA was updated on October 6, 2026 and ChimnPro on October 4, 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.*