Comparison

Gin Air Calculator vs testo Smart

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Gin Air Calculator

Easily calculate and log air volume measurements for efficient airflow in cotton gins and other air-based systems. Input pressure and pipe dimensions to get air velocity and volume rates, then log and share your data.

Highlights
  • Calculate air velocity (FPM)
  • Calculate air volume rate (CFM)
  • Log measurements by location
  • Customizable data points
  • Share data tables via email
  • Supports circular pipes/ducts
Features
Read full description

Make calculating and logging air measurements quicker and easier with this tool. Maintaining good air flow volumes in your cotton gin is key to achieving good efficiency. This app allows you to easily calculate, log and share air measurements to keep all of your air based systems working well. For each location you want to record air volume, simply enter the average velocity pressure (from your pitot tube readings) and the pipe dimension(s). The app can handle circular pipes or ducts. The calculated results display both the air velocity in feet per minute (FPM) and the air volume rate in cubic feet per minute (CFM). When measuring more than one location, each location’s measurements can be logged into a data table. You can custom name each data point as well as enter that location’s static pressure (optional). Once you have collected all of your data, mail the data table to yourself or share it with others. Designed for use by our field engineers in their work in cotton gins with drying systems and moisture restoration systems. Works for other air systems in a cotton gin, as well as other industries with air based systems. For more information on our online air monitoring tools or air system enhancement products, visit our website at www.samjackson.com.

About

testo Smart

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
Read full description

- All in one: The testo Smart App supports you with measurements on refrigeration, air conditioning, and heating systems, as well as in ensuring the safety and quality of food and frying oil, and in monitoring indoor climate and storage conditions. - Fast: Graphically descriptive display of measured values, e.g. as a table, for quick interpretation of results. - Efficient: Create digital measurement reports including. photos as PDF/ CSV files on site and send them via e-mail. The testo Smart App is compatible with the following Bluetooth®-enabled measuring instruments from Testo: - Thermal imager testo 860i for smartphones - All Testo Smart Probes - Digital manifolds testo 550s/557s/558s/550i/570s and testo 550/557 - Digital refrigerant scale testo 560i - Vacuum pump testo 565i - Flue gas analyzer testo 300/310 II/310 II EN - Vacuum gauge testo 552 - Clamp meter testo 770-3 - Volume flow hood testo 420 - Compact HVAC measuring instruments - Frying oil tester testo 270 BT - Temperature meter testo 110 Food - Dual purpose IR and penetration thermometer testo 104-IR BT - Data loggers 174 T BT & 174 H BT - Online data loggers testo 160, testo 162 & testo 164 GW Applications with the testo Smart App Refrigeration systems, air conditioning systems and heat pumps, heating systems, indoor air quality: - Leak test: Recording and analysis of the pressure drop curve. - Superheat and subcooling: Automatic determination of condensation and evaporation temperature and calculation of superheat / subcooling. - Target superheat: Automatic calculation of target superheat - Automatic refrigerant charging by weight, by superheat, by subcooling, and by target superheat - Vacuum measurement: Graphical progress display of the measurement with indication of start and differential value Indoor climate monitoring: - Indoor air quality: automatic calculation of the dew point and wet-bulb temperature - Temperature, humidity, lux, UV, pressure, CO2: the right data logger for every application – from a single solution to an online monitoring system" Ventilation systems: - Volume flow: After the intuitive input of the duct cross-section, the app calculates the volume flow fully automatically. - Diffuser measurements: simple parameterisation of the diffuser (dimensions and geometry), comparison of the volume flows of several diffusers when setting up a ventilation system, continuous and multi-point average calculation. Heating systems: - Flue gas measurement: Second screen function in combination with testo 300 - Measurement of gas flow and static gas pressure: Also possible parallel to the flue gas measurement (delta P) - Measurement of flow and return temperatures (delta T) Thermography: - Determining Delta T on heating, refrigeration/air conditioning, and industrial systems - Detecting hot/cold spots - Assessing the risk of mold Food safety: Temperature Control Points (CP/CCP): - Seamless documentation of measured values to fulfill HACCP specifications - Individually definable limit values and measurement comments within the App for each measurement point - Reporting and data export for regulatory requirements and internal quality assurance Frying oil quality: - Seamless documentation of measured values as well as calibration and adjustment of the measurement instrument - Individually definable limit values and measurement comments within the App for each measurement point - Reporting and data export for regulatory requirements and internal quality assurance --------------------------------------------------------- Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.testo.com/en/company/privacy-policy-app

Screenshots

Gin Air Calculator3 screens
testo Smart4 screens

Verdict

The call

The clearest difference is review sentiment: Gin Air Calculator at 100% against testo Smart's 16%. Gin Air Calculator also leads on rating (5.0 vs 2.7) and in-app purchases (none vs 5). testo Smart's advantage is ratings volume (170 vs 1). On price, update cadence, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. testo Smart sells 5 in-app purchases, starting at $6.99 per month. Gin Air Calculator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Gin Air Calculator holds the better App Store score, 5.0 against 2.7. That said, the two scores are not equally well evidenced: testo Smart has 170 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of Gin Air Calculator's written reviews are positive against 16% of testo Smart's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

Scorecard6 real differences · 4 level
Gin Air Calculator versus testo Smart: the parameters behind the verdict, then further details
ParameterGin Air Calculatortesto Smart
PriceFreeFree
Rating5.0 (1 ratings) — better2.7 (170 ratings)
Positive reviews100.0% of reviews — better16.3% of reviews
Number of ratings1170 — better
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS9.0 — better18.0
Further details — not scored
Size1 MB195 MB
Age rating4+4+
DeveloperSamuel Jackson, Inc.Testo SE & Co. KGaA

Customer experience

Gin Air Calculator

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

testo Smart

All ratings167 ratings
Positive35.9%
Neutral13.2%
Negative50.9%
Written reviews153 reviews
Positive16.3%
Neutral17.6%
Negative66.0%

Bugs and requests

Gin Air Calculator

Not enough reviews yet to summarise bugs or requests.

testo Smart

Reported bugs

5 issues
  • 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

7 requests
  • 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
Show 2 more
  • Improve multi-probe support
  • Integrate more features from physical devices

In-app purchases

None

Gin Air Calculator

No in-app purchases

5 purchases

testo Smart

Subscriptions4
  • Multi-site measurement7 Days trial$6.991 Month
  • Air balancing7 Days trial$9.991 Month
  • Multi-site measurement$69.901 Year
Show 1 more
  • Air balancing$99.901 Year
One-time1
  • Logging digital manifold$44.99

Questions

Is Gin Air Calculator free?
Gin Air Calculator is free to download, with no in-app purchases.
Is testo Smart free?
testo Smart is free to download, with in-app purchases available.
Which has better reviews, Gin Air Calculator or testo Smart?
Gin Air Calculator is rated higher. Gin Air Calculator averages 5.0 out of 5 from 1 ratings, while testo Smart averages 2.7 from 170 ratings.
Do Gin Air Calculator or testo Smart have ads?
Neither Gin Air Calculator nor testo Smart shows ads.
Which is updated more often, Gin Air Calculator or testo Smart?
Gin Air Calculator ships an update every 2 months, and testo Smart every 2 months. Most recently, Gin Air Calculator was updated on November 2, 2026 and testo Smart on November 7, 2026.

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