# ThunderFlash Pro vs Symlex Layer

The clearest difference is ads: Symlex Layer at none against ThunderFlash Pro's shown. Symlex Layer also leads on monetization model (free vs ad-supported) and update cadence (every 6 weeks vs every 3 months). ThunderFlash Pro's advantage is ratings volume (4 vs 1). On price, rating, 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.

On the App Store both sit at effectively the same score — 5.0 for ThunderFlash Pro against 5.0 for Symlex Layer. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

ThunderFlash Pro ships an update every 3 months, Symlex Layer every 6 weeks. Both last shipped on September 24, 2026.

## The numbers

| Metric | ThunderFlash Pro | Symlex Layer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (4 ratings)](https://appshunter.io/ios/app/thunderflash-pro/id6466231857/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/symlex-layer/id6473826941/reviews) |
| Number of ratings | **4** | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | Ad-supported | **Free** |
| Size | 34 MB | 43 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Shenzhen Huanyang Technology Co., LTD](https://appshunter.io/developer/1706037188) | [Kolpolok Limited](https://appshunter.io/developer/1303070471) |

## What reviewers say

### ThunderFlash Pro

[App page](https://appshunter.io/ios/app/thunderflash-pro/id6466231857)

This application provides a secure and fast virtual private network. It allows users to connect to servers globally, enhance online privacy, block malicious attacks, and test network speeds. Get a safer and faster online experience.

**Highlights:** Global network connections, Multiple server choices, Enhanced online privacy, Malicious attack blocking, Detailed IP insights, Network speed testing

**In-app purchases:** none


### Symlex Layer

[App page](https://appshunter.io/ios/app/symlex-layer/id6473826941)

This corporate VPN tool provides secure remote access to your company network. It features two-factor authentication, AES-256 bit encryption, and user provisioning for tailored security.

**Highlights:** Smart Remote Access, Secure Network Access, Two-Factor Authentication, AES-256 Bit Encryption, Dedicated IP, User Provisioning

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

**In-app purchases:** none


## Frequently asked questions

### Is ThunderFlash Pro free?

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

### Is Symlex Layer free?

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

### Which has better reviews, ThunderFlash Pro or Symlex Layer?

ThunderFlash Pro and Symlex Layer are both rated 5.0 out of 5 on the App Store, from 4 and 1 ratings respectively.

### Do ThunderFlash Pro or Symlex Layer have ads?

ThunderFlash Pro shows ads; Symlex Layer does not.

### Which is updated more often, ThunderFlash Pro or Symlex Layer?

ThunderFlash Pro ships an update every 3 months, and Symlex Layer every 6 weeks. Most recently, ThunderFlash Pro was updated on September 24, 2026 and Symlex Layer on September 24, 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.*