# TC vs Green Tools

The clearest difference is price: Green Tools at Free against TC's $1.99. Green Tools also leads on update cadence (every 10 days vs every 3 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

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

TC ships an update every 3 months, Green Tools every 10 days. The most recent releases landed on October 2, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | TC | Green Tools |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| 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 3 months | **Every 10 days** |
| Monetization | Paid | — |
| Size | 12 MB | 29 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [立娜 王](https://appshunter.io/developer/1761096632) | [SGM Lektra S.r.l.](https://appshunter.io/developer/1774457631) |

## What reviewers say

### 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


### Green Tools

[App page](https://appshunter.io/ios/app/green-tools/id6737041911)

**In-app purchases:** none


## Frequently asked questions

### Is TC free?

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

### Is Green Tools free?

Green Tools is free to download, with no in-app purchases.

### Do TC or Green Tools have ads?

Neither TC nor Green Tools shows ads.

### Which is updated more often, TC or Green Tools?

TC ships an update every 3 months, and Green Tools every 10 days. Most recently, TC was updated on October 2, 2026 and Green Tools on October 11, 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.*