Philately collection manager
Every stamp you own, beautifully kept.
Post Data is where your whole stamp collection lives — every stamp photographed, every copy recorded in as much detail as you like, on every device you own. Adding one takes seconds.
The core of Post Data
Built around adding the stamps you own.
Everything else — catalogues, albums, sync — exists to serve one thing: turning the stamps in your hands into a collection you can see, search and carry. Add a stamp in seconds, record the exact copy you're holding, and come back for the detail whenever you like.
Add a stamp in seconds
Quick-add or scan a stamp and it lands in your collection straight away — drop it in your Shoebox now, identify and flesh it out whenever you like.
One record per copy
Every physical stamp is its own record — its condition, its photos, what you paid and where it came from. Duplicates and trade copies stay honest.
As much detail as you want
Start with a name; grow into country, year, perforation, watermark, colours and varieties. Organise into albums and your own catalogues only when you're ready.
A model that matches how collections really work
The listing, the entry, and the copy in your album.
Most apps blur "the stamp as catalogued" with "the stamp I'm holding." Post Data keeps them separate — so one physical copy is described once and counted faithfully, duplicates and all.
TIER 1
Catalogue
The listing authority a number belongs to — defined and named by you.
TIER 2
Catalogue entry
The definition of a stamp within a catalogue — as deep as you want it.
TIER 3
Holding
A specific copy you own — one record per physical stamp, with its own condition and photos.
Capture & detail
Photos lead. The detail is there when you want it.
Scan a stamp with edge detection, keystone correction and crop, or add a whole swipeable gallery — front, back, detail, however many you like. Images are optimised on import, so a large collection stays light: roughly 2.4× more stamps per gigabyte without visible quality loss.
Condition vocabulary
Controlled, not free text — MNH mint never hinged · MH mint hinged · MNG mint no gum.
Colours render as swatches
Philatelic colour names resolve to a hue.
Organise & find
Three places to work — and instant search.
Collection, Albums and Search. Group holdings into ordered albums to flip through like a real album, tag them across themes, and find anything in a keystroke.
Albums, your order
Many-to-many and explicitly ordered — a copy can sit in "Birds," "British Commonwealth" and "1950s" at once, ready for a full-screen flip-through.
Tags across themes
Cross-cut your collection with free-form tags that ignore the catalogue structure entirely.
Search & filter
Free-text across names, countries, numbers and notes; filter by country, year, condition, catalogue, album or tag; sort by value when you've recorded it.
Yours, everywhere — or nowhere but here
Local-first. Sync only when you want it.
Post Data works fully signed-out: a fast, offline collection that lives on your device, even with thousands of photographed stamps. Sign in with Google and your whole collection — records and photos — syncs across your own devices. Sign out and the device returns to clean local-only.
One collection, every device
A single, cohesive app — macOS to mobile to the web.
Not five reskins — one adaptive design that reflows from a phone to a desktop, in light and dark, following your system.
Start with a single stamp.
Open Post Data in your browser and add your first holding in seconds — no account needed. Sign in later to take the whole collection with you.