# Calculate Comfort vs E3 ES

The clearest difference is rating: E3 ES at 5.0 against Calculate Comfort's 3.9. E3 ES also leads on in-app purchases (none vs 1) and ads (none vs shown). Calculate Comfort's advantage is ratings volume (35 vs 1). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Calculate Comfort sells 1 one-off in-app purchase. E3 ES asks for nothing beyond the download.

E3 ES holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Calculate Comfort has 35 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 75% of Calculate Comfort's written reviews are positive against 100% of E3 ES's.

Calculate Comfort ships an update every 4 months, E3 ES every 3 weeks. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Calculate Comfort | E3 ES |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (35 ratings)](https://appshunter.io/ios/app/calculate-comfort/id605648449/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/e3-es/id6596773560/reviews)** |
| Number of ratings | **35** | 1 |
| Positive reviews | 75.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 13 MB | 53 MB |
| Requires iOS | **16.0** | 17.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [JUN KANAYAMA](https://appshunter.io/developer/605648452) | [Webtrack S.A.](https://appshunter.io/developer/947248143) |

## What reviewers say

### Calculate Comfort

[App page](https://appshunter.io/ios/app/calculate-comfort/id605648449)

This app analyzes atmospheric conditions by calculating various air properties like relative humidity, dew point, and enthalpy. It provides visual indicators for comfort levels and allows for easy adjustment of input values using a dial. Advanced features include weather data fetching and unit conversions.

**Highlights:** Calculates RH, Dew Point, Wet-Bulb Temp, Enthalpy, and more, Visual comfort indicators with color and emoji, Adjustable atmospheric pressure input, Switchable between Discomfort Index (DI) and WBGT, Automatic weather data fetching, Unit conversion between SI and US units (Pro), Export calculation results as text (Pro)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $7.99 | one-time |


### E3 ES

[App page](https://appshunter.io/ios/app/e3-es/id6596773560)

This application helps track information related to HVAC systems and other building infrastructure. It is designed for professionals involved in designing and upgrading buildings with high-efficiency systems.

**Highlights:** Track HVAC system information, Monitor building infrastructure, Support for high-efficiency systems, Designed for building upgrades, Data tracking for professionals

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Calculate Comfort free?

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

### Is E3 ES free?

E3 ES is free to download, with no in-app purchases.

### Which has better reviews, Calculate Comfort or E3 ES?

E3 ES is rated higher. Calculate Comfort averages 3.9 out of 5 from 35 ratings, while E3 ES averages 5.0 from 1 ratings.

### Do Calculate Comfort or E3 ES have ads?

Calculate Comfort shows ads; E3 ES does not.

### Which is updated more often, Calculate Comfort or E3 ES?

Calculate Comfort ships an update every 4 months, and E3 ES every 3 weeks. Most recently, Calculate Comfort was updated on October 23, 2026 and E3 ES on October 24, 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.*