FastMask – Fastmail Masks

FastMask is a fast, private, native Android client for managing your Fastmail masked email addresses.

Masked emails are disposable forwarding addresses that protect your real inbox. Use a different one for every website, track who leaked your data, and switch off any address that gets abused — without giving up your real email anywhere.

FastMask brings the masked-email features that already exist on Fastmail's web app to your phone, in a calm, distraction-free interface designed for one thing: getting in, copying or creating an address, and getting back to whatever you were doing.

FEATURES
• View all your masks in a clean list, sorted by latest activity (not creation date)
• Create new masks with custom descriptions and domain associations
• Enable, disable, or archive masks without losing the address
• Edit description, domain, and forwarding URL
• One-tap copy to clipboard with subtle haptic feedback
• Search and filter by Active / Off / Archived
• Quick stats: how many messages each mask has received, when the last one arrived
• Settings screen with language picker, contact link, and logout

DESIGN
• Warm-ink palette — parchment cream and ink navy, not the usual blue
• Instrument Serif headings, Inter Tight body, JetBrains Mono for addresses
• Light and dark mode, both following your system setting
• Smooth shared-element transitions between list and detail
• Subtle, restrained motion — never in the way

PRIVACY & SECURITY
• Zero tracking. Zero analytics. Zero third-party SDKs.
• Your Fastmail API token is encrypted on-device using EncryptedSharedPreferences
• The app talks directly to api.fastmail.com over HTTPS — no servers in the middle
• Network Security Config pins trust to the system CA store
• Release builds log nothing about your network traffic
• Screens are FLAG_SECURE — the token never leaks to screenshots or screen recording
• Open source under MIT license — verify everything for yourself

LANGUAGES

Full UI translations: English, Polish, Spanish, German, French, Italian, Portuguese, Dutch, Russian, Ukrainian, Turkish, Arabic, Hindi, Bengali, Chinese (Simplified), Japanese, Korean, Vietnamese, Thai, Indonesian.

REQUIREMENTS
• Android 8.0 (API 26) or higher
• A Fastmail account with API token access (any paid plan)

To get started, create an API token in Fastmail Settings → Privacy & Security → Integrations → API tokens (scope: Masked Email, read/write), paste it into FastMask once, and you're in.

NOT AFFILIATED WITH FASTMAIL

FastMask is an unofficial, community-built client. It is not affiliated with or endorsed by Fastmail Pty Ltd. "Fastmail" is a trademark of Fastmail Pty Ltd, used here only to describe the service this app integrates with.

OPEN SOURCE

Source code, issue tracker, and release history:
https://github.com/pawelorzech/FastMask

Released under the MIT License. Pull requests welcome.