# OPTICHECK Temperature Mobile vs TC

The clearest difference is price: OPTICHECK Temperature Mobile at Free against TC's $1.99. OPTICHECK Temperature Mobile also leads on iOS requirement (9.0 vs 13.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

OPTICHECK Temperature Mobile is free to download; TC costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

OPTICHECK Temperature Mobile ships an update every 4 months, TC every 3 months. The most recent releases landed on September 23, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | OPTICHECK Temperature Mobile | TC |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tc-rtd-reference/id6504454500/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | — | Paid |
| Size | 59 MB | 12 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KROHNE Messtechnik GmbH](https://appshunter.io/developer/1445655816) | [立娜 王](https://appshunter.io/developer/1761096632) |

## What reviewers say

### OPTICHECK Temperature Mobile

[App page](https://appshunter.io/ios/app/opticheck-temperature-mobile/id1485401520)

**Features:** macOS Compatibility

**In-app purchases:** none


### TC

[App page](https://appshunter.io/ios/app/tc-rtd-reference/id6504454500)

This utility app provides quick and accurate conversions between resistance, potential, and temperature for various thermocouples and RTDs. It supports offline use, temperature recording with export, and offers an intuitive interface for field technicians and engineers.

**Highlights:** Thermocouple and RTD conversion, Supports multiple sensor types, Offline functionality, Temperature recording and charting, Export data to Excel, Intuitive user interface

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is OPTICHECK Temperature Mobile free?

OPTICHECK Temperature Mobile is free to download, with no in-app purchases.

### Is TC free?

TC costs $1.99, with no in-app purchases.

### Do OPTICHECK Temperature Mobile or TC have ads?

Neither OPTICHECK Temperature Mobile nor TC shows ads.

### Which is updated more often, OPTICHECK Temperature Mobile or TC?

OPTICHECK Temperature Mobile ships an update every 4 months, and TC every 3 months. Most recently, OPTICHECK Temperature Mobile was updated on September 23, 2026 and TC on October 2, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*