testo Smart

testo Smart

Fast and reliable measurements

165 ratings
146 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • January 15, 2021
  • July 9, 2026

Features

testo Smart screenshot #1 for iPhone
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About

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.

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
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What users say

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What's New in testo Smart

31.31.31

July 9, 2026

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

Subscription plans

Air balancing

Commission. & maintenance ventilation systems

$9.991 Month
7 Days trial
How to cancel testo Smart subscription ⁉️
5

In-App Purchases

$44.99

Logging digital manifold

Logging function digital manifold

User reviews

More like this please

I needed a handheld air flow meter that allowed for a wide range to verify built in instrumentation. Feel like I found gold in the 510i manometer. It has no screen, only a light and a button. All readings feed through this app which i configure and feed identifiers to. The exported csv files include everything making my documentation work easy as can be.

I don’t know why i need one of these manometers for home, but i want one. Probably should avoid looking at FLIR tools while i still have a checking balance.
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Einloggen

☹️Es nervt einen nach jeden Ende meldet sich die App automatisch ab.
Ständiges Einloggen macht keinen Sinn.
Es wäre auch sinnvoll diese App im offline Modus zu benützen.
Wenn man solche teuern Geräte von Testo kauft erwartet man auch eine 100% App dazu .

App ist nicht einwandfrei!

Das Messgerät an sich ist super wenn man den Akku mal außer Betracht lässt .
Allerdings die App ist eine reine Katastrophe. Wie schon öfters hier beschrieben verbindet sich das Messgerät nur nach mehrmaligen An und Ausschalten mit der App .
Da wir ein Fachbetrieb sind und uns für das Produkt entschieden hatten ist es für uns umso ärgerlicher ,dass das Digitalisieren nur erschwert möglich ist . Warum nur einen Stern vergeben wird hat den Hintergrund , dass man beim Service nicht für Ernst genommen wird und Aussagen getätigt werden wie „ Dies ist uns nicht bekannt versuchen Sie die App auszulagern und wieder zu installieren „ .
Da fragt man sich lesen Sie ihre eigenen Bewertungen nicht ?!
Als letzten Versuch waren wir beim Testo Stand auf der SHK Messe dort wurde genau dasselbe von sich gegeben . „So etwas wäre nicht bekannt man wird belächelt und man könne nicht weiterhelfen ! „
Absolute Frechheit meiner Meinung nach ein Unfertiges Programm bzw. App auf den Markt zu bringen !!
Ich hoffe sehr ,dass es bald ein Update gibt und die Probleme behoben werden !
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Favorites 557s

Changing favorite refrigerants doesn’t “stick”. You remove one and it just goes back to a favorite. Since you can only have 5 I can’t add any which means I spend a ton of time on jobs scrolling through refrigerants. Restore to factory settings on the gauges retains the favorites from the app (with the app closed and phone not connected). I wanted to get something better but guy on marketplace that wanted to buy them has the same problem and I refunded him because he claims the product (or app) is defective.
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Response from developer

Hello! Thank you for bringing this to our attention. We're sorry to hear about the issues with the favorite refrigerants not saving properly. This is clearly frustrating, especially when you're working on-site. We'd like to investigate this issue further. Could you please contact us at appsupport@testo.de. Thank you for your patience. Best regards, Your Testo App Team

Super outils

Génial pour observer et pouvoir analyser le fonctionnement. Un point qui pourrait être intéressant, pour les sondes de pression, c’est d’avoir les températures avec les pressions d’affichées. Ça concerne les sondes 549i. En application froid, elle affiche une pression seulement.

Response from developer

Bonjour, merci beaucoup pour votre évaluation 4 étoiles, cela nous fait vraiment très plaisir. Quelles sondes et quel programme de mesure utilisez-vous exactement dans l'application ? Votre équipe Testo App

Developer apps

User experience

🐞

Reported Bugs

5 issues

App won't connect to devices

Bug

Compatibility issues with newer iOS versions

Bug

Frequent crashes and freezes

Bug

Inability to save favorite refrigerants

Bug

Measurement data not displaying properly

Bug

Requested Features

7 requests

Add option to toggle Bluetooth discovery

Feature

Improve Bluetooth range

Feature

Add ability to customize colors and graphs

Feature

Improve data export functionality

Feature

Add option to name sensors

Feature

Improve multi-probe support

Feature

Integrate more features from physical devices

Feature

FAQ

What does the testo Smart App do?

The testo Smart App is a versatile tool that supports measurements across various applications including refrigeration, air conditioning, heating systems, food safety, and indoor climate monitoring. It allows for quick interpretation of data, creation of digital reports, and seamless sharing of results.

What are the key features of the testo Smart App?

Key features include an all-in-one measurement capability for multiple systems, a graphically descriptive display of measured values for fast interpretation, and the ability to create digital measurement reports with photos in PDF or CSV format, which can then be sent via email.

Is the testo Smart App free to use?

The testo Smart App is free to download and use. However, it is designed to work with specific testo Bluetooth®-enabled measuring instruments, and some advanced functionalities or integrations may involve in-app purchases or require compatible hardware.

What devices is the testo Smart App compatible with?

The app is compatible with a range of Bluetooth®-enabled measuring instruments from Testo, including thermal imagers, Smart Probes, digital manifolds, refrigerant scales, vacuum pumps, flue gas analyzers, and various temperature and data logger devices.

What are common use cases for the testo Smart App?

Common use cases include performing leak tests on refrigeration systems, calculating superheat and subcooling, monitoring indoor air quality parameters like temperature and humidity, measuring volume flow in ventilation systems, and ensuring food safety through temperature documentation.