# Calculate Comfort vs SYSnet AD2

The clearest difference is in-app purchases: SYSnet AD2 at none against Calculate Comfort's 1. SYSnet AD2 also leads on ads (none vs shown) and update cadence (every 5 days vs every 4 months). On price and iOS requirement there is nothing between them.

Both are free to download. Calculate Comfort sells 1 one-off in-app purchase. SYSnet AD2 asks for nothing beyond the download.

Calculate Comfort ships an update every 4 months, SYSnet AD2 every 5 days. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Calculate Comfort | SYSnet AD2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (35 ratings)](https://appshunter.io/ios/app/calculate-comfort/id605648449/reviews)** | — |
| Number of ratings | **35** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 13 MB | 25 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [JUN KANAYAMA](https://appshunter.io/developer/605648452) | [Systronics Co.,Ltd](https://appshunter.io/developer/1829336160) |

## 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 |


### SYSnet AD2

[App page](https://appshunter.io/ios/app/sysnet-ad2/id6749213641)

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

**In-app purchases:** none


## Frequently asked questions

### Is Calculate Comfort free?

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

### Is SYSnet AD2 free?

SYSnet AD2 is free to download, with no in-app purchases.

### Do Calculate Comfort or SYSnet AD2 have ads?

Calculate Comfort shows ads; SYSnet AD2 does not.

### Which is updated more often, Calculate Comfort or SYSnet AD2?

Calculate Comfort ships an update every 4 months, and SYSnet AD2 every 5 days. Most recently, Calculate Comfort was updated on October 23, 2026 and SYSnet AD2 on October 25, 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.*