Postra: Photo Sets
Curate, compose, export photos
Only for Mac
$24.99
Mac
Cull large photo sets fast. AI groups lookalikes; filter by camera, lens or color. From RAW to export-ready layouts — all on your Mac.
Postra is a Mac-only photo library that brings everything from choosing your shots, to building photo sets, to preparing posts for social media into a single workflow.
— Rediscover the joy of "finding" your photos.
No tagging required. Just open a folder, and Postra understands your photos automatically.
[ Similarity search + keyword search ]
- Search by meaning (CLIP) — AI surfaces photos that match a situation, like "sunset, sea" or "crosswalk, people."
- Search by appearance (DINOv2) — perfect for picking the best frame from a burst, or grouping shots with the same tone.
- Keyword search — type in natural language and search even without EXIF tags. "Backlight" or "red umbrella" just work.
[ AI that gauges your best shots ]
- Aesthetic score (NIMA)
On import, every photo is given an aesthetic score from 1.0 to 10.0, color-coded as a relative ranking within the folder, so your best shots stand out at a glance. Fast on-device inference via the Apple Neural Engine.
Note: This is a ranking within the folder, not an absolute rating.
- Color harmony
When a photo set has two or more slots, Postra evaluates tonal consistency in the Lab color space across three levels — in harmony / slightly off / not matching — so you can catch color clashes before export.
[ Dual A/B layout ]
1, 2, 3, 4 photos, or a free layout. Split the layout panel in two to work in parallel with the same or different material. Supports common social ratios such as 1:1, 4:5, 16:9, and 9:16.
[ Non-destructive retouch + color balance ]
Your originals are never altered — adjustments are stored per photo. You can also balance color across an entire photo set.
[ Blazing-fast scrolling ]
Even with folders of tens of thousands of photos, Postra keeps pace with your fingertips. Its JPEG-first pipeline offloads thumbnail generation and Bayer development to the background, so the UI always stays smooth.
[ Requirements ]
- Apple Silicon Mac only (M1 or later)
- macOS 12 Monterey or later
With Postra, turn the time you spend choosing photos into time spent creating.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Postra 1.2.0 — Easier to start, and easier to cull your way.
■ Getting-started guide
A first-run guide walks you through load → cull → arrange → export, with tutorial videos a click away.
■ "Your Taste" sorting (new)
Learns the look of the photos you pick or rate highly and reorders your set by visual similarity, floating the candidates that match your eye to the top. Learning and sorting happen entirely on your device.
■ Rate right on the thumbnails
Hover a thumbnail to set pick/reject and star ratings in place. Optionally auto-advance to the next photo after rating (on by default for new users). A selected-photo info panel was added to the sidebar.
■ Native menu bar
Reach key features from the macOS menu bar — easier to discover what Postra can do.
■ Before / after retouch compare
While you drag a retouch slider, see before and after side by side. Command + scroll works too.
■ "Current View" in the sidebar
See every active sort and filter at a glance, and clear them all in one click.
■ Refinements
Redesigned right-click menu, a collapsible sidebar, and readability tweaks (contrast and button labels).
The developer, Koji Chikazawa, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Koji Chikazawa
- Size
- 12.8 MB
- Category
- Photo & Video
- Compatibility
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
- Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
- Mac
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © Koji Chikazawa

