# ThermVoltGe vs SL Knock

The clearest difference is price: ThermVoltGe at Free against SL Knock's $6.99. SL Knock's advantage is in-app purchases (none vs 1) and update cadence (weekly vs every 2 months). On ads, device support and iOS requirement there is nothing between them.

ThermVoltGe is free to download; SL Knock costs $6.99 up front. ThermVoltGe sells 1 one-off in-app purchase. SL Knock asks for nothing beyond the download.

ThermVoltGe ships an update every 2 months, SL Knock weekly. The most recent releases landed on October 12, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | ThermVoltGe | SL Knock |
| --- | --- | --- |
| Price | **Free** | $6.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Size | 28 MB | 28 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Shoma Kondo](https://appshunter.io/developer/1884832972) | [VIACHESLAV ZHILTSOV](https://appshunter.io/developer/1862005860) |

## What reviewers say

### ThermVoltGe

[App page](https://appshunter.io/ios/app/thermvoltge/id6774421537)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ThermVoltGe Full Version | $4.99 | one-time |


### SL Knock

[App page](https://appshunter.io/ios/app/sl-knock/id6797349065)

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

**In-app purchases:** none


## Frequently asked questions

### Is ThermVoltGe free?

ThermVoltGe is free to download, with in-app purchases available.

### Is SL Knock free?

SL Knock costs $6.99, with no in-app purchases.

### Do ThermVoltGe or SL Knock have ads?

Neither ThermVoltGe nor SL Knock shows ads.

### Which is updated more often, ThermVoltGe or SL Knock?

ThermVoltGe ships an update every 2 months, and SL Knock weekly. Most recently, ThermVoltGe was updated on October 12, 2026 and SL Knock on October 16, 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.*