# Calculate Comfort vs testo Smart

The clearest difference is review sentiment: Calculate Comfort at 75% against testo Smart's 17%. Calculate Comfort also leads on rating (3.9 vs 2.7) and iOS requirement (16.0 vs 18.0). testo Smart's advantage is ads (none vs shown) and ratings volume (170 vs 35). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. Calculate Comfort sells 1 one-off in-app purchase and testo Smart sells 5 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

Calculate Comfort holds the better App Store score, 3.9 against 2.7. Both are backed by a comparable volume of ratings — 35 and 170 respectively. Written reviews point the same way: 75% of Calculate Comfort's written reviews are positive against 17% of testo Smart's.

Calculate Comfort ships an update every 4 months, testo Smart every 2 months. The most recent releases landed on November 1, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | Calculate Comfort | testo Smart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (35 ratings)](https://appshunter.io/ios/app/calculate-comfort/id605648449/reviews)** | [2.7 (170 ratings)](https://appshunter.io/ios/app/testo-smart/id1482139629/reviews) |
| Number of ratings | 35 | **170** |
| Positive reviews | **75.0% of reviews** | 16.9% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 13 MB | 195 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [JUN KANAYAMA](https://appshunter.io/developer/605648452) | [Testo SE & Co. KGaA](https://appshunter.io/developer/966489178) |

## 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 |


### testo Smart

[App page](https://appshunter.io/ios/app/testo-smart/id1482139629)

This app supports measurements for refrigeration, HVAC, and heating systems. It also aids in food safety, frying oil quality, and indoor climate monitoring. Quickly interpret data, create digital reports with photos, and send them via email.

**Highlights:** All-in-one system measurements, Graphical display of measured values, Digital PDF/CSV measurement reports, Email report sharing, Leak test analysis, Automatic refrigerant charging, Indoor air quality monitoring

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Multi-site measurement | $6.99 | per month |
| Air balancing | $9.99 | per month |
| Multi-site measurement | $69.90 | per year |
| Air balancing | $99.90 | per year |
| Logging digital manifold | $44.99 | one-time |

**What reviewers like**

- 👍 Good app with some features
- 🚀 Great product
- 🚀 Useful app for measurements

**What reviewers complain about**

- 🐛 App won't connect
- 🐛 Connectivity issues
- 🐛 Unreliable connection
- 🐛 Forced updates
- 🐛 Laggy and unresponsive UI

**Reported bugs**

- App won't connect to devices
- Compatibility issues with newer iOS versions
- Frequent crashes and freezes
- Inability to save favorite refrigerants
- Measurement data not displaying properly

**Requested features**

- Add option to toggle Bluetooth discovery
- Improve Bluetooth range
- Add ability to customize colors and graphs
- Improve data export functionality
- Add option to name sensors


## Frequently asked questions

### Is Calculate Comfort free?

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

### Is testo Smart free?

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

### Which has better reviews, Calculate Comfort or testo Smart?

Calculate Comfort is rated higher. Calculate Comfort averages 3.9 out of 5 from 35 ratings, while testo Smart averages 2.7 from 170 ratings.

### Do Calculate Comfort or testo Smart have ads?

Calculate Comfort shows ads; testo Smart does not.

### Which is updated more often, Calculate Comfort or testo Smart?

Calculate Comfort ships an update every 4 months, and testo Smart every 2 months. Most recently, Calculate Comfort was updated on November 1, 2026 and testo Smart on November 12, 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.*