About testo Smart
- 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...
- 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
Previous Versions
Here you can find the changelog of testo Smart since it was posted on our website on 2021-12-11 21:25:27.
The latest version is and it was updated on 2026-06-11 23:08:24. See below the changes in each version.
testo Smart version
Updated At: 2026-04-29
Changes: - Switch from Wi-Fi to Bluetooth connection with the flue gas analyzer testo 300 (Please also update the firmware of the testo 300)
- New feature for adjusting the manual scale in thermography applications
- Minor bugs have been fixed
testo Smart version
Updated At: 2026-02-06
Changes: Optimizations for various measurement instruments (testo 860i, testo 558s, etc.)
testo Smart version
Updated At: 2025-05-22
Changes: - Simplified second screen connection with the testo 300 flue gas analyzer
- New feature for adjusting the manual scale in thermography applications
- Minor bugs have been fixed
testo Smart version 28.13.7.87788
Updated At: 2025-03-10
Changes: Integration of the new testo 860i thermal imager with application-specific measurement programs for heating analysis, Delta T determination in refrigeration and air conditioning systems, mold risk assessment, and more.
Indoor climate monitoring: Automated measurement value monitoring thanks to cloud connectivity. Easy commissioning, alerting, and documentation.
testo Smart version 27.10.16.86672
Updated At: 2025-02-05
Changes: Connection with the new digital manifold testo 558s
Minor bug fixes
testo Smart version 27.10.9.85228
Updated At: 2024-12-07
Changes: Integration of the new testo 174 T BT & 174 H BT data loggers
testo Smart version 26.9.6.82468
Updated At: 2024-08-27
Changes: - 2 new measurement programs relating to the safety and quality of food: Frying oil quality & Temperature Control Points (CP/CCP)
- Clustering of the measurement programs into application areas and a customizable 'My area'
- New home screen feature
- New saved data reports management
- Change of the privacy policy in the context of data tracking (If you want to change this setting, go to 'Settings' < 'Privacy settings' < Scroll down < deactivate the function)
testo Smart version 24.0.10.79483
Updated At: 2024-04-26
Changes: - Camera live view in the "Mould indication" measurement program
- Connection to the new testo 565i vacuum pump
- Connection to the new testo 310 II EN flue gas measurement instrument
- Possibility to receive push notifications and in-app notifications
- Various minor bugs have been fixed
testo Smart version 22.9.20.76708
Updated At: 2024-01-15
Changes: Various minor bugs have been fixed
testo Smart version 22.9.19.76429
Updated At: 2024-01-02
Changes: Two new measurement programs: Multi-site measurement & Air balancing ( Please note: Not available in every country)
