Optris calculator vs SmartCell Guide
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Optris calculator
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The Optris Calculator app combines the spot size calculator of the IR pyrometers and the optics calculator of the IR cameras from Optris. For each distance, the spot size of the respective device is calculated. For a correct temperature measurement with pyrometers, it is important that the spot size is not larger than the object to be measured. In the case of the cameras, the measuring area on the object surface to be analyzed is precisely determined. Based on lens information and the distance to the target, field of view dimensions, pixel size (IFOV), and MFOV (from 2x2 pixels to 4x4 pixels depending on product type) are precisely calculated. Thus, the thermal imaging camera can be optimally positioned, and measurement errors avoided. The Optris Calculator is a very helpful tool for selecting the appropriate optics fitting to the respective application. The right choice of optics is needed. App features: โข Calculates the spot size of each device for each distance โข Always up to date through regular updates
SmartCell Guide
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SmartCell Guide offers a host of practical features. Working out of hours or in a different time zone? SmartCell Guide has you covered. WORK OFFLINE - SmartCell Guide leads you through the setting up an entire system without a network connection. It can be viewed when you're out of phone signal and no WIFI is available, or if you're just trying to save battery life. Offline media includes full details on; SmartCell devices, system configuration, system maintenance, fault resolution, a resistor calculator and a handy scanner for device barcodes and QR codes. SmartCell Guide provides additional online links to; SmartCell YouTube channel, technical publications and EMS technical support - all in one place for the first time! There is also a feedback feature that allows the user to help shape the future development of the app. SmartCell Guide is multilingual, now supporting eleven languages. Download the EMS SmartCell Guide today.
Screenshots
Verdict
The clearest difference is iOS requirement: Optris calculator at 12.0 against SmartCell Guide's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Optris calculator ships an update every 2 months, SmartCell Guide monthly. The most recent releases landed on December 3, 2025 and May 19, 2026 respectively.
| Parameter | Optris calculator | SmartCell Guide |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Monthly โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 โ better | 15.0 |
| Further details โ not scored | ||
| Size | 31 MB | 489 MB |
| Age rating | 4+ | 17+ |
| Developer | Optris GmbH | Electronic Modular Services Ltd |
In-app purchases
Optris calculator
No in-app purchases
SmartCell Guide
No in-app purchases
Questions
Is Optris calculator free?
Is SmartCell Guide free?
Do Optris calculator or SmartCell Guide have ads?
Which is updated more often, Optris calculator or SmartCell Guide?
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