Swipe left to skip.
Swipe right to keep.

Waifu Deck is an Android app for collecting anime art. Swipe through ten image boards, one picture at a time, and keep the ones you love in your own library. Free and open source, no sign-up, and everything stays on your phone.

  • No account · open it and swipe
  • No ads · and no tracking
  • Optional · sync to your own storage
waifu.im2659×2952
KEEPSKIP
danbooru2508×3800
KEEPSKIP
waifu.im2038×2894
KEEPSKIP

Everything you keep
is the original.

Not a screenshot, not a compressed copy. Each picture is saved at full size, and the same picture is never stored twice.

It sorts
itself out.

SFW and NSFW stay apart. Filter by source; sort by date saved, resolution or file size. You can import pictures from your own gallery too.

No signal?
Still there.

Your library lives on your phone. Browse it on a plane or in the subway without waiting for anything to load.

0kept in your library

Ten image boards,
dealing in turn.

Danbooru

Large tagged gallery with original sources

SFWNSFW
Skipped

yande.re

Tag-rich anime gallery with original sources

SFWNSFW
Skipped

Konachan

High-resolution anime wallpapers and illustrations

SFW
Skipped

Safebooru

SFW-focused tagged anime gallery

SFW
Skipped

waifu.im

Curated gallery with complete tags

SFWNSFW
Skipped

Nekos API

A larger anime image pool

SFWNSFW
Skipped

Gelbooru

Large tagged gallery, requires your free API key

SFWNSFWneeds API key
Skipped

Rule34

Large NSFW imageboard, requires your free API key

NSFWneeds API key
Skipped

e621

Large tagged imageboard with original sources

SFWNSFW
Skipped

e926

SFW-only mirror of e621

SFW
Skipped
Danbooru
e926Try the switches above to see which boards sit out

Sync to storage
that is yours.

New phone, or a tablet that should see the same library? Connect storage you own. We run no servers and sell no plans.

Locked before
it leaves.

Pictures are encrypted with your password (AES-256-GCM) before they leave your phone. Your storage only ever holds ciphertext.

One key,
only yours.

On another phone, enter the same password and your whole library comes back.

Only you have the password. Forget it and nobody can open the library, including us.

Get an API key →

What it looks like.

Discover
DiscoverOne picture at a time: heart to keep, X to skip, and undo when your thumb slips.
Library
LibrarySFW and NSFW apart; filter by source, sort by date, resolution or size.
Viewer
ViewerOriginal file, artist, tags and source; share or save to Photos in one tap.
Cloud library
Cloud librarySee how many pictures are synced, how much space they use, and what is still uploading.

Every line of it,
out in the open.

Waifu Deck is open source under AGPL-3.0. What the app does with your pictures, keys and passwords is all in the code, so you can check it instead of taking our word for it, or build the APK yourself.

Swipe through anime art from ten sources and keep the ones you love, on your phone and in your own cloud. Free, open source, no account.

  • stars
  • forks
  • License AGPL-3.0
  • Latest release
Build it yourself
git clone https://github.com/fancydirty/waifu-deck.git
cd waifu-deck && npm ci
npm run android

Needs Node.js 24, JDK 17 and the Android SDK.

Questions
you might have.

Not answered here? Email privacy@waifudeck.app.

Cost

Is it really free? Will that change?Free, and open source under AGPL-3.0. We run no servers that store your pictures, so there is no bill to pass on to you.
Are there ads?No ads, no analytics, no tracking.

Privacy

Do I need an account?No. Install it and start swiping; your library stays on your phone.
Will it touch my other cloud files?No. On Google Drive and OneDrive the app can only reach its own folder.

Sync

Can I use it without cloud storage?Yes. Sync is optional; the library on your phone is complete on its own.
Which of the six should I pick?For the least setup, pick Cloudflare R2, Bunny or Backblaze B2: paste one API key and the app creates the rest. Already have Google Drive, OneDrive or a NAS? Use that.
My phone is running out of space.Switch the library to “Cloud only”: the phone keeps thumbnails and fetches full pictures from your storage when you open them.

Install & updates

Why is it not on an app store?Download the signed APK here. When a new version is out the app tells you, and it installs over the old one with your library and storage connection intact.

Last card.
Swipe right to take it.

Waifu Deck Android app
Rather not swipe? Download directly

Also on GitHub Releases, or follow updates with Obtainium