Open SSTP Client
Open SSTP Client Summary
Open SSTP Client is a mobile Android app in Tools by KOBAYASHI Ittoku. Released in Jul 2021 (4 years ago). It has about 414.1K+ installs and 1.3K ratings with a 4.14★ (good) average. Based on AppGoblin estimates, it reaches roughly 5.8K monthly active users . Store metadata: updated Aug 21, 2025.
Recent activity: 608 installs this week (3.5K over 4 weeks) showing steady growth , and 1.00 new ratings this week View trends →
Store info: Last updated on Google Play on Aug 21, 2025 .
4.14★
Ratings: 1.3K
Screenshots
App Description
Simple and open-sourced SSTP VPN client
This is a VPN client app for Secure Socket Tunneling Protocol.
Features:
- Simple for maintainability
- No Ads
- Open source (https://github.com/kittoku/Open-SSTP-Client)
Tips:
With the app's notifications allowed, you can get error messages and disconnect easily. Also, you can connect/disconnect from Quick Settings panel.
License:
This app and its source code are under MIT License. I'll do my best, but be sure that you use this app at your own risk.
Notice:
- Only SoftEther server is officially supported.
- This app uses VpnService class to establish SSTP connections.
False positive detections:
I tested this app's apk on VirusTotal and confirmed nothing detected as of 2022-11-18. I think I made this app as secure as I can by publishing its source, but it seems that some anti-virus softwares are still warning about this app. I'm sorry to say I cannot handle all false positive detections alone. Your available options may be,
1. Ignore the alert.
2. Submit a false positive report to your anti-virus software's vendor.
3. Build this app from its source.
4. Try another SSTP client.
I hope you will achieve secure communication in some way.