# HVAC Toolkit Lite vs E

The clearest difference is update cadence: HVAC Toolkit Lite at every 11 days against E's every 5 months. HVAC Toolkit Lite 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.

HVAC Toolkit Lite ships an update every 11 days, E every 5 months. The most recent releases landed on September 11, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | HVAC Toolkit Lite | E |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hvac-toolkit-lite/id1628371325/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 11 days** | Every 5 months |
| Monetization | Free | — |
| Size | 61 MB | 22 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mohamad Jaber](https://appshunter.io/developer/1623246777) | [Blu](https://appshunter.io/developer/1740302509) |

## What reviewers say

### HVAC Toolkit Lite

[App page](https://appshunter.io/ios/app/hvac-toolkit-lite/id1628371325)

This tool assists HVAC engineers with design checks and quick calculations. It offers various tools for ducting friction loss, pipe sizing, ventilation, and heat load estimations, providing instructions and formulas for each calculation.

**Highlights:** Friction loss calculation, Pipe sizing, Ventilation calculations, Heat load estimation, Pump head calculation, Fan ESP calculation, Metric/Imperial units, English/Arabic language support

**Features:** macOS Compatibility

**In-app purchases:** none


### E

[App page](https://appshunter.io/ios/app/e-line/id6483862551)

**In-app purchases:** none


## Frequently asked questions

### Is HVAC Toolkit Lite free?

HVAC Toolkit Lite is free to download, with no in-app purchases.

### Is E free?

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

### Do HVAC Toolkit Lite or E have ads?

Neither HVAC Toolkit Lite nor E shows ads.

### Which is updated more often, HVAC Toolkit Lite or E?

HVAC Toolkit Lite ships an update every 11 days, and E every 5 months. Most recently, HVAC Toolkit Lite was updated on September 11, 2026 and E on October 17, 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.*