# PT100 Calculator vs TC

The clearest difference is update cadence: PT100 Calculator at monthly against TC's every 3 months. TC's advantage is price ($1.99 vs $2.99) and iOS requirement (13.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

PT100 Calculator costs $2.99 and TC $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PT100 Calculator ships an update monthly, TC every 3 months. The most recent releases landed on September 18, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | PT100 Calculator | TC |
| --- | --- | --- |
| Price | $2.99 | **$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 | **Monthly** | Every 3 months |
| Monetization | — | Paid |
| Size | 3 MB | 12 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [William Newcombe](https://appshunter.io/developer/1215031696) | [立娜 王](https://appshunter.io/developer/1761096632) |

## What reviewers say

### PT100 Calculator

[App page](https://appshunter.io/ios/app/pt100-calculator/id1577277449)

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

**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 PT100 Calculator free?

PT100 Calculator costs $2.99, with no in-app purchases.

### Is TC free?

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

### Do PT100 Calculator or TC have ads?

Neither PT100 Calculator nor TC shows ads.

### Which is updated more often, PT100 Calculator or TC?

PT100 Calculator ships an update monthly, and TC every 3 months. Most recently, PT100 Calculator was updated on September 18, 2026 and TC on October 19, 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.*