# Tehama C2 vs GCTG

The clearest difference is update cadence: Tehama C2 at every 2 months against GCTG's every 20 months. GCTG's advantage is iOS requirement (14.0 vs 16.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Tehama C2 ships an update every 2 months, GCTG every 20 months. The most recent releases landed on August 16, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Tehama C2 | GCTG |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tehama-c2/id1572735567/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 20 months |
| Monetization | Free | — |
| Size | 12 MB | 147 MB |
| Requires iOS | 16.6 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Tehama Wireless](https://appshunter.io/developer/1250249836) | [GCTG Inc.](https://appshunter.io/developer/1649279784) |

## What reviewers say

### Tehama C2

[App page](https://appshunter.io/ios/app/tehama-c2/id1572735567)

This app allows users to configure and monitor wireless sensors. It provides a streamlined interface for managing connected devices and their performance.

**Highlights:** Sensor configuration, Device monitoring, Wireless sensor management, Performance tracking

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

**In-app purchases:** none


### GCTG

[App page](https://appshunter.io/ios/app/gctg/id6443789255)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Tehama C2 free?

Tehama C2 is free to download, with no in-app purchases.

### Is GCTG free?

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

### Do Tehama C2 or GCTG have ads?

Neither Tehama C2 nor GCTG shows ads.

### Which is updated more often, Tehama C2 or GCTG?

Tehama C2 ships an update every 2 months, and GCTG every 20 months. Most recently, Tehama C2 was updated on August 16, 2026 and GCTG 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.*