A foraging companion

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Grzybiarz is a mobile app for mushroom foragers. Its on-device AI helps you spot fruiting bodies in the leaf litter and suggests a species from a photo, and the app keeps a private map of your finds. Everything runs on your phone and works fully offline in the forest without signal.

Species atlas
Pine BoleteBoletus pinophilus
edible
Pine BoleteBoletus pinophilus
Photo: (c) Alan Rockefeller, some rights reserved (CC BY)
Habitat
pine forest
under spruce
mixed forest
Season
from May to November
Season
EndingPast the peak. The season usually lasts until early November.
Today · 22–28 Oct54% of peak
how often reportedpeak
Season
May–Nov
Peak
Aug–Oct
Reports
41from Poland, few
Curve from 41 observations (iNaturalist, Poland), smoothed week by week. It shows when foragers most often report the species, not how much of it grows.
Species description
Close relative of the King Bolete, ecologically tied to pines and spruces. Cap darker, chestnut-brown, sometimes with a violet tinge. Appears earlier in the season than the King Bolete.
Recognition features
confirm features
0 / 4
Toxic look-alikesSpecies most often confused with this one.
Satan's BoleteRubroboletus satanas
toxic
Red pores, flesh blues intensely, stipe with a red reticulum.
Lurid BoleteSuillellus luridus
conditional
Pores red to orange, flesh blues rapidly when cut.
King BoleteBoletus edulis
edible
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Grzybiarz
Grzybiarz is a foraging assistant; the decision to harvest is yours.
© 2026 GrzybiarzVersion 0.0.1 · f66d236
Pine Bolete (Boletus pinophilus) — Edible · Grzybiarz