# PT100 Calculator vs LTH Discover

The clearest difference is price: LTH Discover at Free against PT100 Calculator's $2.99. LTH Discover also leads on iOS requirement (15.6 vs 17.0). PT100 Calculator's advantage is update cadence (monthly vs every 5 months). On ads, in-app purchases and device support there is nothing between them.

LTH Discover is free to download; PT100 Calculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PT100 Calculator ships an update monthly, LTH Discover every 5 months. The most recent releases landed on September 18, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | PT100 Calculator | LTH Discover |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 months |
| Size | 3 MB | 40 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [William Newcombe](https://appshunter.io/developer/1215031696) | [L.T.H. Electronics Limited](https://appshunter.io/developer/1707298349) |

## 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


### LTH Discover

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

**In-app purchases:** none


## Frequently asked questions

### Is PT100 Calculator free?

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

### Is LTH Discover free?

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

### Do PT100 Calculator or LTH Discover have ads?

Neither PT100 Calculator nor LTH Discover shows ads.

### Which is updated more often, PT100 Calculator or LTH Discover?

PT100 Calculator ships an update monthly, and LTH Discover every 5 months. Most recently, PT100 Calculator was updated on September 18, 2026 and LTH Discover on October 25, 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.*