# HVAC Formulator vs LatentChat

The clearest difference is review sentiment: LatentChat at 63% against HVAC Formulator's 9%. LatentChat also leads on rating (3.8 vs 2.0) and in-app purchases (none vs 1). On price, ads, monetization model and device support there is nothing between them.

HVAC Formulator costs $4.99 and LatentChat $4.99 up front. HVAC Formulator sells 1 one-off in-app purchase. LatentChat asks for nothing beyond the download.

LatentChat holds the better App Store score, 3.8 against 2.0. That said, the two scores are not equally well evidenced: LatentChat has 28 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 9% of HVAC Formulator's written reviews are positive against 63% of LatentChat's.

HVAC Formulator ships an update every 2 months, LatentChat every 9 days. The most recent releases landed on October 31, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | HVAC Formulator | LatentChat |
| --- | --- | --- |
| Price | $4.99 | $4.99 |
| Rating | [2.0 (1 ratings)](https://appshunter.io/ios/app/hvac-formulator/id318898907/reviews) | **[3.8 (28 ratings)](https://appshunter.io/ios/app/latentchat-assistant-llm/id6733216453/reviews)** |
| Number of ratings | 1 | **28** |
| Positive reviews | 9.1% of reviews | **63.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | Paid | Paid |
| Best chart rank | — | **#159** |
| Size | 73 MB | 124 MB |
| Requires iOS | 18.6 | **16.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Historycentral.com](https://appshunter.io/developer/1744330560) | [Emanuele Delirio](https://appshunter.io/developer/1553283756) |

## What reviewers say

### HVAC Formulator

[App page](https://appshunter.io/ios/app/hvac-formulator/id318898907)

This app provides HVAC professionals with over 900 essential formulas and calculations for load calculations and system design. It supports both US and Metric units, offers instant switching, and includes 23 calculator categories and over 460 unit conversions. Designed for field use, it works offline and allows users to save and share results.

**Highlights:** Over 900 formulas and calculations, US & Metric unit support, 23 calculator categories, 460+ unit conversions, 8 temperature scales, Offline functionality, Save and share results

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HVAC Pro | $3.99 | one-time |


### LatentChat

[App page](https://appshunter.io/ios/app/latentchat-assistant-llm/id6733216453)

**Currently charting:** #159 Top Paid · Productivity (US App Store)

This app offers an offline, on-device AI chatbot experience. It allows you to use various generative language models locally, connect to remote API endpoints, and build a knowledge center for enhanced conversations. Features include image analysis, speech transcription, and text-to-speech capabilities.

**Highlights:** Offline, on-device AI chatbot, Connect to remote LLM APIs, Retrieval-Augmented Generation (RAG), Multimodal vision capabilities, Speech transcription and text-to-speech, Customizable system prompts

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

**In-app purchases:** none


## Frequently asked questions

### Is HVAC Formulator free?

HVAC Formulator costs $4.99, and also offers in-app purchases.

### Is LatentChat free?

LatentChat costs $4.99, with no in-app purchases.

### Which has better reviews, HVAC Formulator or LatentChat?

LatentChat is rated higher. HVAC Formulator averages 2.0 out of 5 from 1 ratings, while LatentChat averages 3.8 from 28 ratings.

### Do HVAC Formulator or LatentChat have ads?

Neither HVAC Formulator nor LatentChat shows ads.

### Which is updated more often, HVAC Formulator or LatentChat?

HVAC Formulator ships an update every 2 months, and LatentChat every 9 days. Most recently, HVAC Formulator was updated on October 31, 2026 and LatentChat on November 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.*