Tattis is a forecast app made for mushroom foragers that shows where and when mushrooms are likely to grow. The app combines forest type, soil, terrain and up-to-date weather into a species-specific mushroom map covering all of Finland.
Map shows where they grow
- Species-specific heat map based on the combined effect of growing location and weather
- Daily updated forecast – the harvest follows the Finnish Meteorological Institute's weather data
- Forest type layers on top: grove, herb-rich heath, mesic heath, sub-xeric heath, xeric heath, barren heath
- Works offline in the forest – maps are stored on your phone, no signal required
Notifications when harvest time arrives
- Push notification when a species' harvest begins or improves
- Choose yourself which species you want to hear about
- You won't miss the best days when conditions align
Personal mushroom journal
- Save your own finding spots on the map as private
- If you wish, share your observation to the Finnish Biodiversity Information Facility (laji.fi) with one tap
- Browse your past trips and locations
Comprehensive species selection
- Tattis knows 32 species – all edible mushrooms recommended by the Finnish Food Authority plus other edible specialties
Reliable sources
- Species descriptions: Luontoportti and Arktiset Aromit
- Occurrence data: Finnish Biodiversity Information Facility's open data (laji.fi)
- Weather data: Finnish Meteorological Institute
- Terrain and soil data: National Land Survey of Finland, Geological Survey of Finland, Natural Resources Institute Finland
Privacy first
- Tattis doesn't track you. Your own mushroom spots are saved only on your phone, unless you decide to share them to laji.fi. Basic use of the app doesn't require signing in.
Remember: never eat a mushroom you're not sure about identifying. Tattis helps you find them, not identify them.
Terms of Use: https://tattis.life/en/terms/
Privacy Policy: https://tattis.life/en/privacy/
Ratings & Reviews
This app hasn’t received enough ratings or reviews to display an overview.
• New forest view (Pro) replaces the heatmap: woods coloured by today's forecast, each with a page of trees, rain and protected areas
• Redesigned diary: a basket that fills with this season's finds, and finds by day with your photos
• Redesigned species page: where the season stands, and the weather against the species' own good range
• All mushroom illustrations redrawn
• Seasons refined for seven species
• Smaller fixes
Version 2.3
The developer, Jarmo Seppala, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
Purchases
Location
Contact Info
User Content
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Diagnostics
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Lait On Oy
Size
101 MB
Category
Navigation
Compatibility
Requires iOS 15.0 or later.
iPhone Requires iOS 15.0 or later.
iPad Requires iPadOS 15.0 or later.
iPod touch Requires iOS 15.0 or later.
Mac Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
