ProtonMOD‑Next for Android

⚠️ EDUCATIONAL USE ONLY — This fork modifies client-side behavior and may unlock paid features. Not for commercial use or production. Based on ProtonVPN Android
© 2025 SMH01 — Community modification under GPLv3

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Overview

ProtonMOD‑Next is an actively developed experimental fork of the official ProtonVPN Android client.
It is aimed at users in heavily restricted networks and focuses on:

• Transparent VLESS proxy (Xray) integration
• Disabling GuestHole (pre‑login VPN tunnel)
• Disabling Auto‑connect on process restore
• Keeping TLS certificate pinning fully intact

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Legal / Ethical Notice

This project is provided for educational and research purposes only. ProtonMOD‑Next is an unofficial community fork of the Proton VPN Android client.
It modifies client‑side checks and may unlock paid or restricted features that are normally available only with a valid Proton VPN subscription.

Usage Terms

• Do not use this project for any kind of commercial activity or profit.
• Do not use this fork in production environments.
• Using this fork with your own Proton account is entirely at your own risk.
• You are solely responsible for ensuring that your usage complies with Proton VPN's Terms of Service and your local laws.
• The author is not affiliated with Proton AG and provides no warranties or support.

If You Like Proton VPN

Support the original project and purchase a legitimate plan.
Proton AG provides excellent privacy-focused services, and they deserve your support.

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Screenshots

(Screenshots from the official ProtonVPN Android app. ProtonMOD‑Next currently shares the same UI, with modified internals.)

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Features / Modifications

• VLESS proxy integration (Xray)
  Proton API traffic (login, IP checks, account metadata) can be routed through a local VLESS proxy.
  Implemented via a custom ProxySelector applied only to Proton API hosts.
• GuestHole disabled
  The pre‑login GuestHole tunnel is suppressed to avoid failed or suspicious VPN attempts
  in environments where Proton endpoints are blocked.
• Auto‑connect suppression
  Automatic VPN connection on process restore (ConnectTrigger.Auto) is disabled to prevent
  unwanted sessions before the user explicitly connects.
• Security preserved
  The original TLS certificate pinning is kept. Connections to Proton servers are still validated
  against their official pinned certificates.

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Build Instructions

Clone the repository and build with Gradle:

./gradlew assembleProductionVanillaOpenSourceDebug

Android Studio

1. Open Android Studio (latest stable recommended).
2. Select File → Open… and choose the root folder of this repository.
3. Wait for Gradle sync to finish (first sync may take several minutes).
4. In the toolbar, select the build variant:
   • productionVanillaOpenSourceDebug — development / testing
   • productionVanillaOpenSourceRelease — release build
5. Press Run ▶ to install on a connected device or emulator. You can also use Build → Build Bundle(s) / APK(s) to generate APKs directly from the IDE.

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Roadmap

• Integrate VLESS proxy into Proton API requests
• Suppress GuestHole (pre‑login VPN tunnel)
• Disable proxy when not required
• Suppress auto‑connect on process restore
• Add AMOLED‑optimized dark theme (true black + contrast tweaks)

(Roadmap is intentionally small and focused; more items will be added as the project stabilizes.)

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Contributions

Pull requests and issues to this fork's repository are allowed and very welcome. Bug fixes, refactoring, documentation improvements, and clean feature implementations are especially appreciated.

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Development Status

🚧 Active, experimental APIs and behavior may change between builds.
If you depend on a specific behavior, pin to a tag and follow release notes / changelog.

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License

This project is a community modification of ProtonVPN for Android and is distributed under the GPLv3.
See LICENSE for details.