testo Smart vs IHWAP Diagnostics
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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- 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
IHWAP Diagnostics
This application assists with home weatherization by quantifying air leakage, calculating ventilation needs, and assessing duct system pressure against program standards. It helps prioritize air sealing and ensures compliance with energy efficiency guidelines.
- Zone Pressure Diagnostics (ZPD)
- Total External Static Pressure (TESP) calculation
- ASHRAE ventilation requirements
- Leakage reduction potential estimation
- ENERGY STAR compliance checks
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Illinois Home Weatherization Assistance Program (IHWAP) Diagnostics application for the University of Illinois. This app is the product of a collaboration between the Indoor Climate Research & Training Center’s Senior Weatherization Trainer, Nate Price, and me. The Zone Pressure Diagnostics (ZPD) function will quantify the connection between the house and a zone and between that zone and the outdoors. It will also estimate the total leakage reduction potential in the zone, which should assist with prioritizing air sealing measures. The Total External Static Pressure (TESP) function will calculate total pressure and the pressure caused by the various components of a duct system and compare them to Illinois Home Weatherization Assistance Program (IHWAP) standards for recommended replacement options. The American Society of Heating and Air-Conditioning Engineers (ASHRAE) function will calculate home ventilation requirements ensuring proper pollutant control and ENERGY STAR compliance.
Screenshots
Verdict
The clearest difference is review sentiment: IHWAP Diagnostics at 100% against testo Smart's 16%. IHWAP Diagnostics also leads on rating (5.0 vs 2.7) and in-app purchases (none vs 5). testo Smart's advantage is ratings volume (167 vs 5) and update cadence (every 2 months vs every 5 months). On price, 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
Both are free to download. testo Smart sells 5 in-app purchases, starting at $6.99 per month. IHWAP Diagnostics asks for nothing beyond the download.
IHWAP Diagnostics holds the better App Store score, 5.0 against 2.7. That said, the two scores are not equally well evidenced: testo Smart has 167 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 16% of testo Smart's written reviews are positive against 100% of IHWAP Diagnostics's.
testo Smart ships an update every 2 months, IHWAP Diagnostics every 5 months. The most recent releases landed on September 25, 2026 and June 5, 2026 respectively.
| Parameter | testo Smart | IHWAP Diagnostics |
|---|---|---|
| Price | Free | Free |
| Rating | 2.7 (167 ratings) | 5.0 (5 ratings) — better |
| Positive reviews | 16.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 167 — better | 5 |
| Update frequency | Every 2 months — better | Every 5 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 195 MB | 75 MB |
| Age rating | 4+ | 4+ |
| Developer | Testo SE & Co. KGaA | Travis Jenkins |
Customer experience
testo Smart
IHWAP Diagnostics
Bugs and 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
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- Improve multi-probe support
- Integrate more features from physical devices
IHWAP Diagnostics
Not enough reviews yet to summarise bugs or requests.
In-app purchases
testo Smart
- Multi-site measurement7 Days trial$6.991 Month
- Air balancing7 Days trial$9.991 Month
- Multi-site measurement$69.901 Year
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- Air balancing$99.901 Year
- Logging digital manifold$44.99
IHWAP Diagnostics
No in-app purchases
Questions
Is testo Smart free?
Is IHWAP Diagnostics free?
Which has better reviews, testo Smart or IHWAP Diagnostics?
Do testo Smart or IHWAP Diagnostics have ads?
Which is updated more often, testo Smart or IHWAP Diagnostics?
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