# Hongtool vs CoolCalc

The clearest difference is in-app purchases: Hongtool at none against CoolCalc's 3. Hongtool also leads on device support (3 vs 1) and iOS requirement (9.0 vs 16.0). CoolCalc's advantage is update cadence (monthly vs every 11 months). On price and ads there is nothing between them.

Both are free to download. CoolCalc sells 3 in-app purchases, starting at $9.99 per month. Hongtool asks for nothing beyond the download.

Hongtool ships an update every 11 months, CoolCalc monthly. The most recent releases landed on October 18, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Hongtool | CoolCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/coolcalc-hvac-tools/id6773545951/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Monthly** |
| Monetization | — | Free with in-app purchases |
| Size | 154 MB | 29 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [海淑 金](https://appshunter.io/developer/1733572260) | [杰 陈](https://appshunter.io/developer/1746018277) |

## What reviewers say

### Hongtool

[App page](https://appshunter.io/ios/app/hongtool/id6497873827)

**Features:** macOS Compatibility

**In-app purchases:** none


### CoolCalc

[App page](https://appshunter.io/ios/app/coolcalc-hvac-tools/id6773545951)

This offline toolkit for service technicians provides essential HVAC calculations, job documentation, and professional PDF reporting. It supports A2L refrigerants and prioritizes user privacy with no account or cloud storage required.

**Highlights:** Offline HVAC calculations, PT Chart and Charge Check, Duct Sizing and Airflow Calcs, Capacitor and Refrigerant Log, Professional PDF report generation, A2L refrigerant support, Privacy-focused, no account needed

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CoolCalc Pro Monthly | $9.99 | per month |
| CoolCalc Pro Yearly | $59.99 | per year |
| CoolCalc Pro Lifetime | $99.99 | one-time |


## Frequently asked questions

### Is Hongtool free?

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

### Is CoolCalc free?

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

### Do Hongtool or CoolCalc have ads?

Neither Hongtool nor CoolCalc shows ads.

### Which is updated more often, Hongtool or CoolCalc?

Hongtool ships an update every 11 months, and CoolCalc monthly. Most recently, Hongtool was updated on October 18, 2026 and CoolCalc on October 15, 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.*