testo Smart App. One App for all applications.
Multifunctional. Continuously up to date. Free.

Compatible measuring instruments for refrigeration systems and heat pumps
Compatible measuring instruments for ventilation and air conditioning systems and Indoor Air Quality
Compatible measuring instruments for testo Smart Probes
Compatible measuring instruments for current measurement
Compatible measuring instruments for heating systems
All advantages of the testo Smart App
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testo Smart App in action
Servicing refrigeration systems with testo Smart App and testo 557s