Giant Mushroom Studio is a one-person workshop building self-hosted, privacy-first apps for tabletop role-playing games, world-builders, live streamers, and anyone who'd rather their data stay on their own device. Six apps in the wild.
Giant Mushroom Studio builds the tools I wanted when running my own campaigns, streaming, and recording podcasts — and that I couldn't find without paying a subscription, surrendering my data, or stitching ten things together with sticky tape.
Most of it runs on your own machine, talks only to your own people, and stays out of your data. Some is open source, some is a one-off purchase on the App Store, none is a subscription. Some of it is rough around the edges. Most of it is faster than you'd expect. All of it is built one feature at a time based on actual use.
— Jake, Giant Mushroom Studio
A self-hosted virtual tabletop for 5e tabletop RPGs. Per-player instanced fog of war, AI-powered token generation, full combat tracking, an extensible plugin system, and complete GM control — running entirely on your own machine.
forge.giantmushroom.studioThe fantasy calendar for dungeon masters. Design custom months, moon cycles, seasons, and weather — then track every arc of your campaign in one beautiful desktop app.
cronos.giantmushroom.studioTranslate between 31 fantasy languages — Dwarvish, Elvish, Draconic, Infernal and more. Perfect for handouts, in-world props, and immersive worldbuilding at your table.
rune.giantmushroom.studioStream any app's audio plus your voice into Discord, Zoom, or OBS. The macOS GUI front-end BlackHole 2ch never had — perfect for sharing battle music or ambient tracks during live-play streams.
whitehole.giantmushroom.studioA private, on-device journal for iPhone, iPad, and Mac. Apple Intelligence helps you reflect on what you've written without any of it leaving your device. Optional sync to iCloud, Nextcloud, Dropbox, or Google Drive — your account, your data, your choice.
giantmushroom.studio/inkusShared chores, the weekly schedule, and the shopping list for your whole household — in sync across every phone, tablet and watch. End-to-end encrypted and synced through a cloud account you already own, with no servers in the middle.
giantmushroom.studio/choremeA native Jellyfin music client for Mac and iOS. Daily mixes that fit, a real 10-band EQ, lossless offline playback, Last.fm-powered similar artists and bios, and a Now Playing screen worth opening.
giantmushroom.studio/boleraJust software that works on your own machine, runs at the speed of light, and stays out of your way.