Your photos. Your documents.Your collection.
Local management for photos, documents and 3D assets in existing folders — with a timeline and optional local AI. No mandatory cloud. No subscription.
Local on your Mac no mandatory cloud no subscription
TestFlight beta: Apple silicon (M1 or newer)
The familiar Picasa idea — existing folders, a quick overview and effortless rediscovery — rebuilt for today's large archives.
Profiles separate different collection worlds without moving files: travel, family, work or archive each get their own library folders, views and search context. The “Travel” profile shows the complete flow — from the gallery to ratings, local AI tags, descriptions and recognised text.
Gatterie does not begin with a new import, but with what is already there: your folders, your files and your memories.
Gatterie works with your existing collection — across multiple library folders, without moving or duplicating files.
Find memories through file names, tags, ratings and a timeline down to the exact day.
Gatterie works without AI. If you want more, connect your own local model.
From calm Mocca through terry cloth and rainforest to moss, wood and plush: switch the interface to suit your collection. The gallery stays intentionally neutral, so your photos always remain the focus.
PDF, Office, OpenDocument, iWork, Markdown, CSV and even HTML appear side by side with real previews. Even Canon RAW files in CR2 format get a thumbnail — and everything opens safely in the appropriate default app.
It is surprisingly liberating: no guessing from filenames, no switching between specialist views. Web pages, reports, spreadsheets and RAW captures become one coherent visual library you can understand at a glance.
Try Gatterie →Gatterie renders GLB and glTF right in the gallery — characters, terrains and entire scenes are recognizable at a glance. Blender files show their embedded preview, and FBX, OBJ, STL and friends open safely in the appropriate default app.
Everything runs locally on your Mac: no extra software, no converter, no cloud. Especially in large asset libraries this saves you from opening heavy scenes just to find out which file contains which model.
No mandatory cloud, no account and no telemetry in the core product. Metadata and ratings stay local; optional AI runs through local services on your computer.
The public TestFlight beta is now open. No application or personal invitation is required: open the link on your Mac, install Apple's TestFlight app and download Gatterie. Start with a copy of your collection and send feedback directly through TestFlight.
Gatterie is developed independently and with great care, born from first-hand experience with growing image and project collections. Your feedback directly helps make the app more useful in everyday life.
