A foraging companion

Find.
Identify.
Save.

A pocket companion for mushroom foragers, powered by on-device AI that helps you spot fruiting bodies in the leaf litter, suggests a species from a photo, and keeps a private map of your finds. It all runs on your phone, fully offline, deep in the woods, with no signal.

Species atlas
Identification resultPhoto mode
edible
King BoleteBoletus edulis
82%
high confidenceCombined identification confidence based on morphological features.
July to October
pine forest
mixed forest
under oaks
Other possibilities
Pine BoleteBoletus pinophilus
9%
Bay BoleteImleria badia
4%
Birch BoleteLeccinum scabrum
3%
Toxic look-alikes in PolandCompare distinguishing features before picking.
Satan's BoleteRubroboletus satanas
toxic
Red pores, flesh blues intensely, stipe with a red reticulum.
Bitter BoleteTylopilus felleus
inedible
Very bitter taste, pores turn pinkish, dark reticulum on the stipe.
Lurid BoleteSuillellus luridus
conditional
Pores red to orange, flesh blues rapidly when cut.
Features to confirmCheck off what you see in the field.
confirm features
0 / 5
Species description
One of the most prized edible mushrooms. Grows singly or in groups, mostly from summer through late autumn. Recognised by a thick, barrel-shaped stipe with a white reticulum and a brown cap.
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Manifesto

The app is only a foraging assistant. What ends up in the basket and on the plate is a human call: made with judgement, with experience, and when something looks off, with a mycologist. We do not replace knowledge. We help you build it.

107species in the atlas
100%works offline
<100 mson-device detection
PL · CZ · SKmaps offline
Two models that run on your phone
What powers the app
Two models that run on your phone

Underneath sits AI trained on Polish species. One model spots fruiting bodies in the frame, the other recognises the species from a photo. Both run locally, with no network, and they report confidence honestly: when they do not know, they say so.

Eyes on the leaf litter

A segmentation model sweeps the camera feed 15 to 30 times a second and outlines fruiting bodies, even the ones tucked into the leaves.

Recognition with humility

The classifier returns the most likely species with calibrated confidence. When the image is ambiguous it would rather say "I am not sure" than guess.

Everything on device

The models ship with the app. No photo travels to a server, and recognition works even where there is no signal.

Built for every way you forage
Three pillars: finding fruiting bodies, identifying the species, leaving a trace of your trips. All on-device, no privacy trade-offs.
A phone above leaf litter outlining a hidden porcini with an AR contour
01
Mobile
AR detection in the leaf litter

The camera guides you across the leaf litter while the app scans the frame 15–30 times a second, traces a contour around any fruiting body, and buzzes when it spots something worth a closer look. The YOLO model and the species classifier both run on the phone, with no network and no cloud.

Specimen plate of a porcini with annotations and alternatives
02
Mobile + Web
Photo-based identification

Take a sharp photo of a single specimen. You get back the most likely species with honestly calibrated confidence, a checklist of features to work through, and a list of toxic look-alikes. You always see why the app is sure, or why it is not.

Porcini and devil's bolete shown side by side
03
Safety
Toxic look-alikes at a glance

Boletus edulis next to Rubroboletus satanas. Parasol next to death cap. Wood mushroom next to yellow-stainer. Side-by-side comparisons of the most often confused pairs sit right beside the recognition result, so you decide deliberately and with the full picture.

Topographic forest map with find pins
04
Offline
Private finds map

Every confirmed find lands on your private map. Poland, Czechia and Slovakia come as downloadable offline packages, so the vector basemaps load with no signal. GPX export, your copy, your trace. Nothing left behind on a server.

Foraging trail loop on a map with an elevation profile
05
Lifestyle
Foraging sessions

Start a session as you head in, let the GPS draw your trail in the background, and stop it back at the car. Distance, steps, elevation gain, pace, plus photos saved straight to your gallery. Strava for mushroom pickers, only quieter: no tracking pixels and no social drama.

Open botanical atlas with a porcini and a parasol on parchment pages
06
Knowledge
Species atlas

Over 100 Central European species with descriptions, seasons and habitat tags. The cards are written from mycological literature, including the Wojewoda atlas, rather than stitched together from Wikipedia. Season, habitat, diagnostic features, field photos and toxic pairs.

In the field
A map that leads you through the woods

Start a trip and your phone draws your track on an offline map. You see where you have already walked, where you tagged each mushroom and how far you have come. All with no signal, because the basemap lives on the phone.

Works with no bars

Download a region once and the map then loads straight from storage. Deep in a forest where nothing reaches you, you still know where you stand.

Your track, live

GPS draws a line behind every step. Distance, time and pace add up on their own, and you watch the route trace across the contours.

Pins where it grew

Every find lands on the map exactly where you picked it. A year later you walk back to the same spot instead of guessing from memory.

Recap and export

After the trip you get distance, elevation and the list of finds. Send the track as a GPX file or an image, to whoever you like.

Stylized map with contour lines, an amber trip track and find pins
PLCZSK
Offline maps
Three countries in your pocket

Vector maps of Poland, Czechia and Slovakia download once, each as its own package. From then on the basemap loads straight from your phone: deep in the woods, up in the Tatras, across the border, without a single bar of signal.

Polandoffline package ~1.3 GB
Czechiaoffline package ~500 MB
Slovakiaoffline package ~200 MB

Zoom 0-14, OpenMapTiles schema, quarterly updates. You only download the countries you actually walk.

No compromisesYour data stays with you
Works offline

No cloud, no tracking, no signal needed in the woods.

On-device models

Detection and classification on your phone. Photos never leave the device.

Local finds map

Your foraging history stays on your device. GPX export, your copy.

Every mushroom is a trace of the forest. Reading those traces is a discipline, not magic.
Grzybiarz · product manifesto
Pre-release testing
Be among the first foragers

The app is in testing on Android and iPhone before it reaches the stores. Sign up and we will email you an invite as soon as your test track opens.

AndroidGoogle Play test track
iPhonevia TestFlight

Invite-only access. The link arrives by email as soon as you confirm your signup.

Grzybiarz
A foraging assistant. The harvest decision belongs to you.
© 2026 GrzybiarzVersion 0.0.1 · a5fe6ad
Grzybiarz — interactive mushroom search and recognition