# Cleantech Forums vs STFC

The clearest difference is update cadence: Cleantech Forums at every 2 weeks against STFC's every 7 months. 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.

Cleantech Forums ships an update every 2 weeks, STFC every 7 months. The most recent releases landed on October 1, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Cleantech Forums | STFC |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 7 months |
| Size | 72 MB | 5 MB |
| Requires iOS | 17.0 | **16.6** |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [CTG:I LLC](https://appshunter.io/developer/1771675672) | [Mvine](https://appshunter.io/developer/967932728) |

## What reviewers say

### Cleantech Forums

[App page](https://appshunter.io/ios/app/cleantech-forums/id6736369386)

**Features:** macOS Compatibility

**In-app purchases:** none


### STFC

[App page](https://appshunter.io/ios/app/stfc/id6752931466)

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

**In-app purchases:** none


## Frequently asked questions

### Is Cleantech Forums free?

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

### Is STFC free?

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

### Do Cleantech Forums or STFC have ads?

Neither Cleantech Forums nor STFC shows ads.

### Which is updated more often, Cleantech Forums or STFC?

Cleantech Forums ships an update every 2 weeks, and STFC every 7 months. Most recently, Cleantech Forums was updated on October 1, 2026 and STFC on October 10, 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.*