1. Take the photo
Photograph the fish. A phone camera is enough — no particular quality is required. The EXIF data in the image carries the time and often the position; we read that automatically so you do not have to type it in. It does not travel with the picture: public copies have all EXIF data stripped before they are shown, and the original with the coordinates stays private.
A tip: hold the fish horizontally with something of known size in the frame — a rod, the line, your hand — if you want the length to come out more accurately. The AI calibrates against a reference object when there is one.
2. The AI fills it in
The image goes to a vision AI, which sends back a complete draft in about five seconds:
- Species — identified from body shape, colour pattern and proportions.
- Length in cm — estimated, and calibrated against a visible reference object.
- Method — ice fishing, jigging, spinning, fly, float, lure trolling, trolling… inferred from the tackle and the surroundings in the image.
- A weather note — observable conditions from the light and the water in the image ("clear sky", "no wind", "snowfall").
- Time and position — read straight from the EXIF.
No fields to fill in from nothing. You have the final word — every field can be changed before you publish.
3. Confirm or adjust
A quick look at the draft. Is the species right? Is the length right? Then press publish.
Not quite right? Tap the field and adjust it. Changing anything by hand is always possible.
4. Choose who sees it
Private (only you), Friends (shown to confirmed friends, with the exact position), or Public (everyone sees the catch with its water — where in the water you fished is not published).
The default is Public. We recommend it — your catch contributes to the national picture of Swedish fishing, and the position stays with you.
5. The leaderboards count your catch
Verified public catches (automatic, community or admin) go into the leaderboards by themselves — by species, water, county and year. Is your fish longer than anything else reported that year? Then you are top of the list.
In a running challenge with friends, the standing updates straight away.
6. The catch keeps growing
Once the catch is published, the page fills with context on its own — all of it derived from the time and place the AI has already read:
- The moon phase, and the sun and twilight times for that day — computed locally from standard astronomical formulae.
- The air pressure at the spot and how it moved over that day — interpolated from SMHI's open weather data.
- The water temperature at the catch and over the surrounding days, set against the seasonal normal — from SMHI's S-HYPE model.
- Air temperature, wind, precipitation and solar radiation at the catch — added when they are notable (strong wind, rain, frost or a heatwave).
- A short account of the catch written by the AI — published with the catch, and editable.
- Cross-links to the lake or river page, the species page and the county page — your catch appears there too, and over time builds up that page's leaderboard.
All of it happens in the background. There is nothing more for you to fill in.