# Sigma VPN vs Flatnetsite

The clearest difference is update cadence: Flatnetsite at every 5 weeks against Sigma VPN's every 3 months. Sigma VPN's advantage is iOS requirement (13.0 vs 15.6). 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.

Sigma VPN ships an update every 3 months, Flatnetsite every 5 weeks. The most recent releases landed on October 20, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Sigma VPN | Flatnetsite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (15 ratings)](https://appshunter.io/ios/app/sigma-vpn/id1524035161/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 37 MB | 7 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sigma Telecom LLC](https://appshunter.io/developer/1235040796) | [bora ates](https://appshunter.io/developer/1551641430) |

## What reviewers say

### Sigma VPN

[App page](https://appshunter.io/ios/app/sigma-vpn/id1524035161)

Browse the internet securely and privately with this application. It encrypts your internet traffic and routes it through a secure virtual network to protect your online data. The app features a user-friendly interface and supports multiple devices simultaneously.

**Highlights:** Secure internet browsing, Private online data protection, Encrypted internet traffic, User-friendly interface, Multi-device support

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

**In-app purchases:** none


### Flatnetsite

[App page](https://appshunter.io/ios/app/flatnetsite/id6752628895)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sigma VPN free?

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

### Is Flatnetsite free?

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

### Do Sigma VPN or Flatnetsite have ads?

Neither Sigma VPN nor Flatnetsite shows ads.

### Which is updated more often, Sigma VPN or Flatnetsite?

Sigma VPN ships an update every 3 months, and Flatnetsite every 5 weeks. Most recently, Sigma VPN was updated on October 20, 2026 and Flatnetsite on October 16, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*