# Cielo PRO vs CoolCalc

The clearest difference is in-app purchases: Cielo PRO at none against CoolCalc's 3. On price, rating, ratings volume and update cadence there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Cielo PRO against 5.0 for CoolCalc. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 10, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Cielo PRO | CoolCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/cielo-pro/id6757784458/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/coolcalc-hvac-tools/id6773545951/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 28 MB | 29 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Cielo WiGle Inc.](https://appshunter.io/developer/1030282554) | [杰 陈](https://appshunter.io/developer/1746018277) |

## What reviewers say

### Cielo PRO

[App page](https://appshunter.io/ios/app/cielo-pro/id6757784458)

This tool empowers HVAC professionals to efficiently install smart thermostats, manage customer relationships, and enhance their business branding. It offers guided workflows, Bluetooth configuration, and AI-powered templates for quick and reliable setups.

**Highlights:** Free Pro Branding, Guided Thermostat Installation Workflow, Bluetooth-Based Configuration, AI-Powered HVAC Configuration Templates, Save Thermostat Configurations, HVAC Equipment Testing, Instant Thermostat Handoff, Customer & Workforce Management

**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 Cielo PRO free?

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

### Is CoolCalc free?

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

### Which has better reviews, Cielo PRO or CoolCalc?

Cielo PRO and CoolCalc are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do Cielo PRO or CoolCalc have ads?

Neither Cielo PRO nor CoolCalc shows ads.

### Which is updated more often, Cielo PRO or CoolCalc?

Cielo PRO ships an update every 3 weeks, and CoolCalc every 3 weeks. Most recently, Cielo PRO was updated on October 10, 2026 and CoolCalc on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*