# testo Smart — Fast and reliable measurements > Mobile app for HVAC, refrigeration, food safety, and climate measurements. (iPhone/iPad app by Testo SE & Co. KGaA.) - Source: https://appshunter.io/ios/app/testo-smart/id1482139629 (this page in markdown: same URL + `.md`) - Developer: [Testo SE & Co. KGaA](https://appshunter.io/developer/966489178) - Category: Productivity, Utilities - Price: Free with in-app purchases - Rating: 2.70/5 from 165 App Store ratings · 151 written reviews indexed - Age rating: 4+ - Requires: iOS 18.0 · 175 MB - Released: 2021-01-15 - Data updated: 2026-08-25 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/testo-smart/id1482139629/reviews.md ## What is 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 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 --------------------------------------------------------- Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.testo.com/en/company/privacy-policy-app ## Key features - 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 ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Air balancing | $9.99 | per month | | Air balancing | $99.90 | per year | | Multi-site measurement | $6.99 | per month | | Multi-site measurement | $69.90 | per year | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Logging digital manifold | $44.99 | one-time | ## What do users think of testo Smart? Overall sentiment: negative **Pros** - 👍 Good app with some features - 🚀 Great product - 🚀 Useful app for measurements **Cons** - 🐛 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 **Commonly reported bugs** - App won't connect to devices - Compatibility issues with newer iOS versions - Frequent crashes and freezes - Inability to save favorite refrigerants - Measurement data not displaying properly **Most requested features** - Add option to toggle Bluetooth discovery - Improve Bluetooth range - Add ability to customize colors and graphs - Improve data export functionality - Add option to name sensors - Improve multi-probe support - Integrate more features from physical devices ## Recent user reviews (10 of 151) All indexed reviews: https://appshunter.io/ios/app/testo-smart/id1482139629/reviews.md ### 5/5 — Chiller tech *2026-07-11, version 31.31.31* Are you guys going to add refrigerant R-514 for the new low pressure centrifugals? Please add it Thank you ### 5/5 — Works as it should *2026-06-13, version 31.31.21* Good app and love my 558s. Haven’t had an issue with app, gauges, probes, micron gauge, etc.. glad I went testo over fieldpiece ### 5/5 — More like this please *2026-06-09, version 31.31.21* 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. ### 3/5 — Paul *2026-06-05, version 31.31.21* This app could be soooooo good yet it falls down on the basics . I use it for lev testing of dust drops and There is nowhere to put a drop number. You have to put it in the information. Which ok at least it’s in the paperwork. But then you go back to the list and it only shows the customer time and date in the list NO information. So I spend hours trying to search for pod 10 out of 50 pods. It’s so frustrating. The only way to get around it is to export and name each file after a pod but if you name one wrong or miss one, you try find it in the list? Such a shame. It just doesn’t let you rename a save file and save it in the app. That’s all it needs to do ### 3/5 — Einloggen *2026-06-01* ☹️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 . ### 1/5 — App ist nicht einwandfrei! *2026-05-27* 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 ! ### 1/5 — Does not work with the testo 300 *2026-05-04, version 31.31.20* Maybe this app works with other devices but it does not work with the testo 300 ### 2/5 — Is anyone actually working on this?! *2026-05-01, version 31.31.20* This has to be the worst app for refrigeration I have ever used. Do the developers actually use the stuff they produce?! There's no way to pre configure which data is displayed on the graphics?! Are you kidding me?! Do you know how much time I have wasted researching high pressure, sub cooling, and liquid line temperature because the stupid defaults are useless to me?!? This is beyond frustrating. Every other app I have used for other manufacturers tools is more configurable and makes sense from a technicians perspective. The testo hardware itself is great-- this app makes me regret ever buying it though! I wish I knew the Bluetooth protocols involved -- I bet I could vibe code a replacement that blows this app away in a weekend. ### 1/5 — Favorites 557s *2026-04-15, version 30.2.16* 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. ### 4/5 — Super outils *2026-03-24* 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. **Developer response:** 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 ## Frequently asked questions about testo Smart ### 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. ## Version history (last 5 releases) ### 31.31.31 — 2026-07-09 - testo Smart Connect Cloud – Connect your testo Smart App to the all-new testo Smart Connect Cloud for intuitive, central data management. ### 31.31.21 — 2026-05-06 - testo Smart Connect Cloud – Connect your testo Smart App to the all-new testo Smart Connect Cloud for intuitive, central data management. ### 31.31.20 — 2026-04-27 - testo Smart Connect Cloud – Connect your testo Smart App to the all-new testo Smart Connect Cloud for intuitive, central data management. - testo 565i ATEX – Support for the new testo 565i ATEX vacuum pump – simply connect via the App and get started. ### 31.31.15 — 2026-04-20 - testo Smart Connect Cloud – Connect your testo Smart App to the all-new testo Smart Connect Cloud for intuitive, central data management. - testo 565i ATEX – Support for the new testo 565i ATEX vacuum pump – simply connect via the App and get started. ### 30.2.16 — 2026-02-11 Optimizations for various measurement instruments (testo 860i, testo 558s, etc.) ## Apps similar to testo Smart | App | Rating | Price | Category | | --- | --- | --- | --- | | [CE HVAC Pro+](https://appshunter.io/ios/app/ce-hvac-pro-plus/id512637219) | 4.7 (1,561) | Free | Productivity | | [Fluke Connect](https://appshunter.io/ios/app/fluke-connect/id694449312) | 4.4 (230) | Free | Productivity | | [measureQuick HVAC](https://appshunter.io/ios/app/measurequick-hvac/id1273187731) | 5.0 (5) | Free | Productivity | | [CPS Link](https://appshunter.io/ios/app/cps-link/id1185092042) | 1.9 (154) | Free | Productivity | | [XOi Vision](https://appshunter.io/ios/app/xoi-vision/id1436638483) | 2.8 (110) | Free | Productivity | | [Climatix](https://appshunter.io/ios/app/climatix/id1527230319) | 3.0 (9) | Free | Productivity | ## More apps by Testo SE & Co. KGaA - [testo Combustion App](https://appshunter.io/ios/app/testo-combustion-app/id992414788) - [testo 330i App](https://appshunter.io/ios/app/testo-330i-app/id1007290554) - [testo 420](https://appshunter.io/ios/app/testo-420/id1011111546) - [testo Smart Probes](https://appshunter.io/ios/app/testo-smart-probes/id1026721981) - [testo Thermography](https://appshunter.io/ios/app/testo-thermography/id1123010537) - [testo Saveris Food Solution](https://appshunter.io/ios/app/testo-saveris-food-solution/id1436026886) All apps by Testo SE & Co. KGaA: https://appshunter.io/developer/966489178 ## Related topics [testo smart probes](https://appshunter.io/ios/topics/testo-smart-probes) · [testo](https://appshunter.io/ios/topics/testo) · [testo smart](https://appshunter.io/ios/topics/testo-smart) · [tosto](https://appshunter.io/ios/topics/tosto) · [testo smart app](https://appshunter.io/ios/topics/testo-smart-app) · [testo 549i](https://appshunter.io/ios/topics/testo-549i) · [broen t650](https://appshunter.io/ios/topics/broen-t650) · [aerox weps04](https://appshunter.io/ios/topics/aerox-weps04) · [lomanco vent selector](https://appshunter.io/ios/topics/lomanco-vent-selector) · [ambrasistemi](https://appshunter.io/ios/topics/ambrasistemi) · [bosch fluid energy monitoring](https://appshunter.io/ios/topics/bosch-fluid-energy-monitoring) · [gefarapp s](https://appshunter.io/ios/topics/gefarapp-s) · [smart imeters](https://appshunter.io/ios/topics/smart-imeters) · [julabo us](https://appshunter.io/ios/topics/julabo-us) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-25.*