testo Smart

Contains adsIn-app purchases
2.9
1.56K reviews
500K+
Downloads
Content rating
Everyone
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About this app

- 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
Updated on
Sep 8, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Location, App info and performance, and Device or other IDs
This app may collect these data types
App info and performance
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

2.9
1.49K reviews
Mark Bowman
July 20, 2025
I feel sorry for those that have bought into the testo smart tools. Testo forces update each execution, what setup you had before that was working now No longer works. Now you're forced wasting time setting up Your device is to work with an app again. That's probably programmed by someone that doesn't have a clue. of what field work is and how time sensitive it is. i've spent more time trying to get the device is to link up to the app then I spend using the tools doing my job. Testo 0 stars.
3 people found this review helpful
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Testo SE + Co.KGaA
July 21, 2025
Hello Mr. Bowman, can you please try the following: Deinstall the "testo Smart App" (blue icon) & "testo Smartprobes App" (greyish icon), reinstall the "testo Smart App" freshly from the Google Play Store. Does the issue with the forced update still occur?? If yes, we would kindly ask you to contact us via e-mail at appsupport@testo.de.
Jon
April 22, 2025
kept trying to force me to update saying it would only take a few minutes. I kept declining because I'm busy working and don't see any reason for the update since my gages were working just fine. unfortunately it asks you to update the firmware every single time you do something and unfortunately I accidentally accepted while evacuating a system. Now I've been completely locked out of my equipment for the last 30 minutes, it isn't even 50% done with its update and I need to FINISH MY JOB!
1 person found this review helpful
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Testo SE + Co.KGaA
April 23, 2025
Hi Jon, we understand that updates can be a bit of a nuisance, but they keep your devices running smoothly – like a service for your car. If they're skipped for a while, it can take longer to catch up. Perhaps next time, it might work better during a quiet moment after work. Thank you for your feedback and patience! Your Testo App Team
Pavel Dz
September 2, 2025
(see your response to my previous feedback) Yes, "advanced settings - last opened measurement program" works and is helpful. I was surprised why it was hidden so deep in settings. Yet, with "Home Screen" settings, when opened fresh, the app doesn't' render favorites (no programs shown under the text "favorites") on the home screen; only the rest of the programs are shown under "All refrigeration programs". Experiment: If all of them are added to favorites, it renders no programs at all.
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Testo SE + Co.KGaA
September 1, 2025
Hi Pavel, Thank you for updating your review. When the feature was new, we promoted it for a while, but you’re right — it’s now quite hidden. How about this option: create your own application area by clicking “My area” in the "Application area" menu. Add all your favourite measurement programs to your area and set this area as your home screen.

What’s new

Optimizations for various measurement instruments (testo 860i, testo 558s, etc.)