# FireSprinkPro vs HVAC Duct Flow

The clearest difference is in-app purchases: HVAC Duct Flow at none against FireSprinkPro's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. FireSprinkPro sells 2 in-app purchases, starting at $17.49 per month. HVAC Duct Flow asks for nothing beyond the download.

FireSprinkPro ships an update weekly, HVAC Duct Flow every 5 days. Both last shipped on November 10, 2026.

## The numbers

| Metric | FireSprinkPro | HVAC Duct Flow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Every 5 days** |
| Size | 21 MB | 6 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Michael Fritz](https://appshunter.io/developer/6792256062) | [Ahmet Selvi](https://appshunter.io/developer/1864624578) |

## What reviewers say

### FireSprinkPro

[App page](https://appshunter.io/ios/app/firesprinkpro/id6792256060)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FireSprinkPro Monthly | $17.49 | per month |
| FireSprinkPro Lifetime License | $175.99 | one-time |


### HVAC Duct Flow

[App page](https://appshunter.io/ios/app/hvac-duct-flow-duct-sizing/id6819098420)

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

**In-app purchases:** none


## Frequently asked questions

### Is FireSprinkPro free?

FireSprinkPro is free to download, with in-app purchases available.

### Is HVAC Duct Flow free?

HVAC Duct Flow is free to download, with no in-app purchases.

### Do FireSprinkPro or HVAC Duct Flow have ads?

Neither FireSprinkPro nor HVAC Duct Flow shows ads.

### Which is updated more often, FireSprinkPro or HVAC Duct Flow?

FireSprinkPro ships an update weekly, and HVAC Duct Flow every 5 days. Most recently, FireSprinkPro was updated on November 10, 2026 and HVAC Duct Flow on November 10, 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.*