# HVAC Psychrometric LT vs INTERSOFT

The clearest difference is price: INTERSOFT at Free against HVAC Psychrometric LT's $0.99. INTERSOFT also leads on in-app purchases (none vs 1) and update cadence (every 2 weeks vs every 11 months). On ads, device support and iOS requirement there is nothing between them.

INTERSOFT is free to download; HVAC Psychrometric LT costs $0.99 up front. HVAC Psychrometric LT sells 1 one-off in-app purchase. INTERSOFT asks for nothing beyond the download.

HVAC Psychrometric LT ships an update every 11 months, INTERSOFT every 2 weeks. The most recent releases landed on September 21, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | HVAC Psychrometric LT | INTERSOFT |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 2 weeks** |
| Monetization | Paid | — |
| Size | 18 MB | 343 MB |
| Requires iOS | **15.6** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Carmel Software Corporation](https://appshunter.io/developer/317970398) | [Intersoft Systems](https://appshunter.io/developer/1707671755) |

## What reviewers say

### HVAC Psychrometric LT

[App page](https://appshunter.io/ios/app/hvac-psychrometric-lt/id348669920)

Perform quick and simple single-air stream psychrometric calculations on your iPhone or iPad. Easily select and update input parameters, view results instantly, and export data via email or spreadsheet.

**Highlights:** Single-state HVAC psychrometric calculations, Universal app for iPhone and iPad, All inputs and results on one screen, 23 input parameter combinations, Real-time results with slider control, Export results via HTML email and spreadsheet

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HVAC Equipment Locator | $9.99 | one-time |


### INTERSOFT

[App page](https://appshunter.io/ios/app/intersoft/id6741684662)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is HVAC Psychrometric LT free?

HVAC Psychrometric LT costs $0.99, and also offers in-app purchases.

### Is INTERSOFT free?

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

### Do HVAC Psychrometric LT or INTERSOFT have ads?

Neither HVAC Psychrometric LT nor INTERSOFT shows ads.

### Which is updated more often, HVAC Psychrometric LT or INTERSOFT?

HVAC Psychrometric LT ships an update every 11 months, and INTERSOFT every 2 weeks. Most recently, HVAC Psychrometric LT was updated on September 21, 2026 and INTERSOFT on September 9, 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.*