STS vs VPN
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
STS
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It’s a data management platform to help with TBM tunneling. It provides TBM operation monitoring and allows users to have safe and reliable access to real-time monitoring. The platform would improve TBM tunneling efficiency and thus shorten construction duration. The platform is mainly designed to conduct distance monitoring, construction progress management and work report generation
VPN
This app provides intelligent network management for iOS devices. It allows users to easily import server nodes, switch proxy modes, and capture all network traffic. Advanced rule management enables precise control over connections and ad blocking.
- One-click server node import
- Multiple proxy modes
- HTTP, HTTPS, and TCP traffic capture
- Advanced rule configuration
- Traffic usage monitoring
- Ad blocking
- Local DNS mapping
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English (Polished Promotional Version) FlyShadow – Your Smart Rule-Based Proxy Solution FlyShadow is a powerful, rule-based proxy client for iPhone and iPad, designed for seamless and intelligent network management. One-click import of server nodes for instant setup. Switch effortlessly between different proxy modes. Start your proxy connection with a single tap. Simple, intuitive interface – easy for anyone to use. Advanced Traffic Control & Rule Management Capture all HTTP, HTTPS, and TCP traffic from any app on your device, and redirect it to your proxy server. Configure precise rules using domain matches, domain suffixes, keywords, CIDR IP ranges, or GeoIP lookup. Monitor traffic usage and network speed across WiFi, cellular, direct, and proxy connections. Import rule files from URLs or iCloud Drive. Block ads efficiently using domain and user-agent rules. Local DNS mapping for faster and more reliable connections.
Screenshots
Verdict
The clearest difference is in-app purchases: STS at none against VPN's 10. STS also leads on iOS requirement (13.2 vs 15.0). VPN's advantage is update cadence (weekly vs every 2 weeks). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. VPN sells 10 one-off in-app purchases. STS asks for nothing beyond the download.
STS ships an update every 2 weeks, VPN weekly. The most recent releases landed on October 2, 2026 and October 18, 2026 respectively.
| Parameter | STS | VPN |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.0 (2 ratings) — better |
| Number of ratings | — | 2 — better |
| Update frequency | Every 2 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Apple TV — better |
| Requires iOS | 13.2 — better | 15.0 |
| Further details — not scored | ||
| Size | 12 MB | 28 MB |
| Age rating | 4+ | 9+ |
| Developer | 中铁工程装备集团有限公司 | OrangePlusZero LLC |
In-app purchases
STS
No in-app purchases
VPN
- Monthly Light Plan$2.99
- Semi-Annual Light Plan$17.99
- Semi-Annual Standard Plan$23.49
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- Quarterly Premium Plan$24.99
- Annual Light Plan$35.49
- Lifetime Plan V2$42.49
- Annual Standard Plan$46.49
- Semi-Annual Premium Plan$48.49
- Lifetime Plan V3$94.99
- Annual Premium Plan$96.99









