Mobile app
Známky.cz — now in your pocket
Manage your collection, scan whole pages and let our AI recognise and categorise every stamp — the Známky.cz app for collectors.
- Scan a whole page — AI categorises every stamp
- Stamp recognition with our own AI technology
- Manage your collection and track its value
- Your want list and a basic catalog, always with you
Scan with your phone — opens Google PlayDesigned for collectors
Easy collection management
Keep your whole collection organised and track its value in one place. Import straight from Excel, or add items by uploading a scan or just a phone photo. Optimised for banknote collectors and other collecting fields too. App is connected also to your account available on website, so you can manage the collection on your Desktop in the same time.
Scan a whole page
Photograph an entire sheet and AI sorts and catalogs every stamp at once.
AI stamp recognition
Our proprietary AI recognises a stamp and suggests the catalog number and variant.
Share your collection
Show your collection to other collectors and get inspired by theirs.
Catalogue on your phone
A basic stamp catalogue of Czechoslovakia I and II, the Czech Republic, Slovakia and the Protectorate, always at hand.
Digital loupe
Zoom into fine details — perforation, overprints and plate flaws.
Easiest want-list tracking
The simplest way to track the stamps still missing from your collection.
Basic version free
Znamky+ removes all limits — a monthly fee that pays for itself.
Scan or photo of a page → 20 stamps or more
You do not have to shoot stamp by stamp. Scan or photograph a whole album page or stockbook page — the AI finds the individual stamps in that image, crops them out and identifies them. From the page shown it pulled out 20 stamps.
- Scan or photo. A single image of an album page, a stockbook page or a selection card — from the camera, from a scanner or from your gallery. Nothing else needed.
- The AI splits the sheet for you. From the page above the app pulled out 20 separate stamps — each cropped on its own, with a quality estimate and a recognition confidence score (89–91%). Dozens of stamps recorded from one image.
- Check and confirm. Untick anything that did not come out, then save the rest to your collection in one tap. Catalogue numbers and details can be filled in in bulk.
Recognition works on a single stamp too — but scanning a whole page is what really saves time. A free account has a monthly cap on recognitions; Znamky+ members get more.
One scan / photo of an album page
Show your exhibit
Build a digital exhibit right on your phone — no scanner, no computer. Either photograph whole album pages, or compose each page in the editor from items already in your collection.
- Photograph a whole page. The quickest route — upload an album page from the camera or your gallery as a finished exhibit page, several at a time if you like.
- Or compose a page in the editor. Build a page from items already uploaded to your collection, from gallery photos and from new shots. Add headings and captions, and pick the typeface and text size.
- Edit any time. Reorder pages, rewrite text, move elements around and delete the ones that did not come out. Rename the exhibit or add more pages whenever you want.
- Share a link. One tap creates a link you can send to anyone — the recipient does not need the app.
- Enter the exhibition. Add your exhibit to the public Collection exhibition and tag it so other collectors can find it.
A free account creates a limited number of exhibits; Znamky+ members have no limit. Anyone can browse the exhibition without signing in.
Install in three steps
Download the APK file
Tap “Znamky.apk”. The file (approx. 300 MB) saves to your Downloads folder.
Allow installation
On first launch, allow “Install unknown apps” for your browser.
Install and sign in
Open the file, confirm the install and sign in with the same account as on the web.
