OI Lead Adviser vs testo Smart
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OI Lead Adviser
This mobile tool assists leaders in preparing, conducting, recording, and reporting on leadership visits. It offers guidance on visit procedures, suggests relevant discussion topics based on site type, and allows for easy note-taking and rating. Completed visits are automatically saved and can be emailed for follow-up.
- Prepare and conduct leadership visits
- Record visit results and notes
- Suggests relevant discussion topics by site type
- Intuitive and user-friendly interface
- Automatic draft saving
- Email completed visit reports
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The OI Lead Adviser app is a mobile tool that allows the user to prepare, conduct, record and report leadership OI visits. The OI Lead Adviser app is for business managers, managing directors, and other leaders who are conducting leadership OI visits. It is both a tool to remind leaders of how to conduct a visit and a means of recording the results of the visit. The OI Lead Adviser App is also used by OI managers to track the KPI of mandatory leadership OI visits per leader per year. Key Features: - The app is intuitive and user-friendly - Featuring big ORANGE PLUS button to create a New Visit record, the app guides you from start to end of the Leadership OI Visit. - Featuring with various types of visited sites (office, field, etc.) the app suggests you typical Areas of Interest, the topics to discuss with personnel during the visit. Only Areas of Interest that are relevant to the Type of Site will be suggested to the leader. Other Areas of Interest can be added as well. - There are no long checklists. Instead there are Areas of Interest, Keywords and Keyphrases which allow easy usage on the go. - To each Area of Interest the app features the Notes and possibility to add rating “Good” or “Needs Work”. - The app automatically saves a draft of the record, which remains available until completion. The manager can concentrate on the visit and people around him not on the app Easy to create visit record: - Use big orange + button - Select site type to see suggested Areas of Interest. Areas of Interest are typical issues/risks of the selected site type. Expand/collapse Areas of Interest and add notes and ratings as applicable - All visit details, are saved automatically Use your records: - Scroll for all visits on the home page - Competed visits sent on your @sgs.com email - Follow up on your report with others (visited site manager, etc.) Security and access: - The record of the visit will be stored both within the app itself and on the app's server. - The complete record of each visit is sent to the user's @sgs.com email. - The OI team accesses the visits’ demographic metrics only (to evaluate KPI completion); they do not have access to the Visit Notes
testo Smart
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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- 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
Screenshots
Verdict
The clearest difference is rating: OI Lead Adviser at 3.8 against testo Smart's 2.7. OI Lead Adviser also leads on in-app purchases (none vs 5) and iOS requirement (13.0 vs 18.0). testo Smart's advantage is ratings volume (170 vs 4). On price, update cadence, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. testo Smart sells 5 in-app purchases, starting at $6.99 per month. OI Lead Adviser asks for nothing beyond the download.
OI Lead Adviser holds the better App Store score, 3.8 against 2.7. That said, the two scores are not equally well evidenced: testo Smart has 170 ratings behind it against 4, so its average is the more settled of the two.
OI Lead Adviser ships an update every 3 months, testo Smart every 2 months. The most recent releases landed on October 13, 2026 and October 29, 2026 respectively.
| Parameter | OI Lead Adviser | testo Smart |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (4 ratings) — better | 2.7 (170 ratings) |
| Positive reviews | — | 16.3% of reviews |
| Number of ratings | 4 | 170 — better |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 27 MB | 195 MB |
| Age rating | 17+ | 4+ |
| Developer | SGS Group Management SA | Testo SE & Co. KGaA |
Customer experience
OI Lead Adviser
testo Smart
Bugs and requests
OI Lead Adviser
Not enough reviews yet to summarise bugs or requests.
testo Smart
Reported bugs
5 issues- 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
Requested features
7 requests- 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
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- Improve multi-probe support
- Integrate more features from physical devices
In-app purchases
OI Lead Adviser
No in-app purchases
testo Smart
- Multi-site measurement7 Days trial$6.991 Month
- Air balancing7 Days trial$9.991 Month
- Multi-site measurement$69.901 Year
Show 1 moreShow fewer
- Air balancing$99.901 Year
- Logging digital manifold$44.99









