testo Smart

Contains adsIn-app purchases
2.8
1.75K reviews
Content rating
Everyone
500K+
Downloads
Content rating
Everyone
Learn more
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

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 incl. 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 analyser testo 300/310 II/310 II EN/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:
- 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
- Vacuum measurement: Graphical progress display of the measurement with indication of start and differential value

Indoor climate monitoring:
- Inndor 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 mould

Food safety:
Temperature Control Points (CP/CCP):
- Seamless documentation of measured values to fulfil 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
29 Apr 2026

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
1.67K reviews
Mark Bowman
20 July 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.
8 people found this review helpful
Did you find this helpful?
Testo SE + Co.KGaA
21 July 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.
Bryth Halpin
31 May 2026
The app makes me log in everyday. I cleared the cache, uninstalled and reinstalled the app same problem. The probe mapping dies not save. I have to select the probes by the last 3 digits of the serial number which are very small to read. Can we name the probes when we set them up the first time so we know which probe is which every time? I feel the Testo app should be just as good as the hardware. There is another app that nailed these features but lacks the look and feel of the Testo app.
Did you find this helpful?
Testo SE + Co.KGaA
1 June 2026
Hello Mr. Halpin, thank you for your feedback! Which Testo instrument and measurement program do you use? Does 'probe mapping' mean the probes should already be pre-selected on next app start? Renaming probes is a great idea – we've forwarded it to our product management! You can also reach us by email at appsupport@testo.de. Best regards
Nova Chervet
2 June 2026
Does not work, none of my professional temperature devices (12 Testo Saveris 2 T1) are displayed in the app
Did you find this helpful?
Testo SE + Co.KGaA
8 June 2026
Hello Nova Chervet, the Testo Saveris 2 data loggers are not compatible with the testo Smart App. Where did you see the information stating that these data loggers could be connected to the testo Smart App? You are welcome to email us at appsupport@testo.de. Kind regards, Your Testo App Team

What's new

- testo Smart Connect Cloud – Connect your testo Smart App to the all-new testo Smart Connect Cloud for intuitive, central data management.