Comparison

testo Smart vs Gree

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

Head to head
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

About

Gree

This mobile tool simplifies the work of air conditioning installers and service technicians. It helps manage client data, track installations, schedule maintenance, and access technical documentation. The app also facilitates warranty claims and training registrations.

Highlights
  • Client and installation data management
  • Barcode scanning for devices
  • Warranty service planner
  • Access to technical documentation
  • Extend authorization certificate
  • Submit training applications
  • Streamlined warranty claims
Features
Read full description

Aplikacja GREE – STREFA INSTALATORA powstała z myślą o instalatorach i serwisantach klimatyzacji. Jest mobilnym narzędziem, które ułatwia pracę i pozwala zaoszczędzić czas. To nowość w branży HVAC, absolutnie pionierskie rozwiązanie, opracowane i stworzone przez Free Polska - wyłącznego przedstawiciela marki Gree w Polsce. Instalatorze, rejestracja w mobilnej Strefie Instalatora Gree to same korzyści! Aplikacja Gree zapamięta wszystkie Twoje instalacje: zapiszesz tu dane klientów, typy zamontowanych urządzeń, daty ich instalacji. Będziesz mógł wybrać urządzenia z gotowej listy lub zeskanować ich kod kreskowy. Aplikacja pomoże Ci także spełnić obowiązek informacyjny RODO względem swojego klienta. Aplikacja Gree wyświetli Ci listę zaplanowanych przeglądów gwarancyjnych dla zainstalowanych urządzeń: zyskasz wygodny planer, łatwo umówisz każdy przegląd i dodasz jego datę do kalendarza. Będziesz mógł wyświetlić listę przeglądów, filtrując je po nazwie klienta czy miejscu realizacji. Aplikacja zawiera pełną dokumentację techniczną Gree: wszystkie ważne informacje będziesz mieć zawsze pod ręką, a jeśli jesteś Autoryzowanym Instalatorem Gree będziesz mieć dostęp do DTR urządzeń, sterowników i akcesoriów. Aplikacja daje możliwość przedłużenia ważności Certyfikatu Autoryzacyjnego Gree o 12 miesięcy jednym kliknięciem, wygodnie i szybko! Aplikacja pozwala na wysyłanie zgłoszeń udziału w szkoleniach technicznych Gree prowadzonych w dwóch zakresach: RAC i GMV. Aplikacja Gree daje możliwość składania reklamacji w łatwy i błyskawiczny sposób: funkcjonalność jest dostępna tylko dla Autoryzowanych Instalatorów Gree, którzy z poziomu aplikacji wypełniają wniosek reklamacyjny, wnioskują o nowe części serwisowe poprzez wybranie ich z listy części przyporządkowanych do konkretnego modelu Gree, obserwują przebieg informacji i dostają powiadomienia o postępach i wysyłce nowych części. Proces reklamacyjny w aplikacji Gree trwa krótko, jest intuicyjny i skuteczny. Aplikacja wyświetli Ci najważniejsze aktualności Gree skierowane do instalatorów: najnowsze promocje, cenniki, nowinki techniczne, itp. Instalatorze, aplikacja GREE – STREFA INSTALATORA powstała z myślą o Tobie. Przekazujemy na Twoje ręce nowe narzędzie pracy, z którego mamy nadzieję, będziesz z zadowoleniem korzystać każdego dnia. Jeśli jesteś Autoryzowanym Instalatorem Gree i zarejestrujesz się w naszej aplikacji, Twój Certyfikat Gree z zakresu RAC przedłużymy o kolejne 6 miesięcy! Do zobaczenia w mobilnej Strefie Instalatora Gree!

Screenshots

testo Smart4 screens
Gree4 screens

Verdict

The call

The clearest difference is review sentiment: Gree at 82% against testo Smart's 16%. Gree also leads on in-app purchases (none vs 5) and update cadence (every 2 weeks vs every 2 months). testo Smart's advantage is rating (2.7 vs 2.3) and ratings volume (170 vs 6). 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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

testo Smart holds the better App Store score, 2.7 against 2.3. That said, the two scores are not equally well evidenced: testo Smart has 170 ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 16% of testo Smart's written reviews are positive against 82% of Gree's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

testo Smart ships an update every 2 months, Gree every 2 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

Scorecard7 real differences · 3 level
testo Smart versus Gree: the parameters behind the verdict, then further details
Parametertesto SmartGree
PriceFreeFree
Rating2.7 (170 ratings) — better2.3 (6 ratings)
Positive reviews16.3% of reviews81.8% of reviews — better
Number of ratings170 — better6
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.015.0 — better
Further details — not scored
Size195 MB90 MB
Age rating4+4+
DeveloperTesto SE & Co. KGaAFree Polska Sp. z o.o.

Customer experience

testo Smart

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

Gree

All ratings6 ratings
Positive33.3%
Neutral0.0%
Negative66.7%
Written reviews33 reviews
Positive81.8%
Neutral3.0%
Negative15.2%

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

Gree

Not enough reviews yet to summarise bugs or requests.

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
None

Gree

No in-app purchases

Questions

Is testo Smart free?
testo Smart is free to download, with in-app purchases available.
Is Gree free?
Gree is free to download, with no in-app purchases.
Which has better reviews, testo Smart or Gree?
testo Smart is rated higher. testo Smart averages 2.7 out of 5 from 170 ratings, while Gree averages 2.3 from 6 ratings.
Do testo Smart or Gree have ads?
Neither testo Smart nor Gree shows ads.
Which is updated more often, testo Smart or Gree?
testo Smart ships an update every 2 months, and Gree every 2 weeks. Most recently, testo Smart was updated on October 25, 2026 and Gree on October 24, 2026.

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