# LTH Discover vs TC

The clearest difference is price: LTH Discover at Free against TC's $1.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

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

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on September 8, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | LTH Discover | 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 3 months | Every 3 months |
| Monetization | — | Paid |
| Size | 44 MB | 12 MB |
| Requires iOS | 13.2 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [L.T.H. Electronics Limited](https://appshunter.io/developer/1707298349) | [立娜 王](https://appshunter.io/developer/1761096632) |

## What reviewers say

### LTH Discover

[App page](https://appshunter.io/ios/app/lth-discover/id6476649403)

**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 LTH Discover free?

LTH Discover is free to download, with no in-app purchases.

### Is TC free?

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

### Do LTH Discover or TC have ads?

Neither LTH Discover nor TC shows ads.

### Which is updated more often, LTH Discover or TC?

LTH Discover ships an update every 3 months, and TC every 3 months. Most recently, LTH Discover was updated on September 8, 2026 and TC on September 15, 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.*