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testo Smart

testo Smart

Fast and reliable measurements

167 ratings
153 reviews
🔧 Utilities
📊 Productivity
Free
In-App Purchases

Details

  • Released
  • Updated
  • January 15, 2021
  • September 16, 2026

Features

Developer

Testo SE & Co. KGaA
✨Promote your app ✨
testo Smart screenshot #1 for iPhone
testo Smart screenshot #2 for iPhone
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testo Smart screenshot #8 for iPhone
iphone
ipad
🧾$44.99
In-App Purchase↘︎
📌Ready
Reviews summary↘︎
⭐153
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📝13+ tags
Tags↘︎
🔄6+ apps
Alternatives↘︎
❓5 answered
FAQ↘︎
📦~ in 2 months
Updates frequency↘︎
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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
Show original description

What users say

Summarized from real user reviews of testo Smart. Based on 167 reviews and a 2.7/5 average, it highlights the 3 positives and 8 negatives reviewers mention most about this Productivity app.

Positive things

  • 👍Good app with some features
  • 🚀Great product
  • 🚀Useful app for measurements

Negative things

  • 🐛App won't connect
  • 🐛Connectivity issues
  • 🐛Unreliable connection
  • 🐛Forced updates
  • 🐛Laggy and unresponsive UI
  • 🐛Crashes and bugs
  • 🐛Doesn't work as expected
  • 🐛Poor app design and functionality
See all reviews

What's New in testo Smart

32.1.8

September 16, 2026

• testo 330 / testo 320 connectivity (Second Screen): Connect the new testo 330 and testo 320 flue gas analysers via the Second Screen function. • testo Smart Connect sync for flue gas and climate applications: Flue gas and climate applications are now synchronised between the testo Smart App and the testo Smart Connect Cloud.

More
5

Subscriptions & In-App Purchases

Air balancing

Commission. & maintenance ventilation systems

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

User reviews

Most RecentHighest RatedLowest Rated

Testo 550s @ Apple

we recently began using the 550S combined with the smart app. While the 550s works very well as a stand alone manifold the app is doesn’t generate reports or show the pressures at the top of the screen. The only work around we have found is screen recordings if you’re using iPad or an iPhone. The pressures are shifted to the bottom of the screen into small blocks. The lack of its ability to generate reports is a deal breaker for us. The app does not work as advertised. It’s a shame really the instrument it’s self works great. If your team requires proof prior to new unit commissioning. This app is not for you.
Show more
Darkhorses44Darkhorses44

Response from developer

Hi, Thank you for your honest and detailed feedback. We are sorry to hear that the testo Smart App is currently not meeting your expectations, especially when it comes to generating reports and displaying the pressure values. Could you please tell us what happens when you try to generate a report? Do you receive an error message, or is the report option unavailable? If possible, please send us a screen recording or screenshots showing the issue at appsupport@testo.de. This would help us investigate the problem and support you more effectively. We would be very happy to look into this and assist you further. Best regards, Your Testo App Team

Connection impossible

Il m’est impossible de voir le Testo 405i depuis mon iphone 15 ( aucune apparition sur le bluetooth)
Thomas405iThomas405i

Response from developer

Bonjour, Veuillez ne pas rechercher le testo 405i dans les réglages Bluetooth de votre iPhone. Ouvrez plutôt l’application (Bluetooth activé) et attendez un instant après avoir allumé le testo 405i. Un message contextuel devrait alors s’afficher pour indiquer qu’un instrument de mesure a été détecté. Cliquez sur le bouton « Connecter l’instrument de mesure ». Est-ce que cela a fonctionné ? Votre équipe Testo App

Chiller tech

Are you guys going to add refrigerant R-514 for the new low pressure centrifugals? Please add it

Thank you
Chiller godChiller god

Works as it should

Good app and love my 558s. Haven’t had an issue with app, gauges, probes, micron gauge, etc.. glad I went testo over fieldpiece
matts5664matts5664

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.
Show more
XedBriteXedBrite

Response from developer

Hi, thank you very much for your 5-star rating and your kind words. We’re delighted to hear that you’re happy with the app and the testo 510! 🤩 Your Testo App Team

See 148 more reviews

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See 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.