Welcome to Eritech Studios. We design and build clean, purposeful utility apps for iPhone and Android — private logbooks that work offline, with no account to create.
Our Applications
- The Travel Binder — A fully offline binder for flights, hotels, bookings, documents, packing and checklists, with the whole trip on one map. No account, no cloud.
- The Bake Log — A specialised mobile companion for sourdough bakers, designed to track hydration, fermentation times, and bake logs to perfect every loaf.
- Kohii — A dedicated coffee and espresso companion designed to log brew recipes, track extraction parameters, and dial in the perfect cup.
- Cellar Book — A wine cellar companion that tracks drink windows on every bottle, with label photos, tasting notes on the 100-point scale, and an offline atlas of your collection's regions.
- Leaflet — A plant care tracker with watering and feeding schedules, care reminders, and a photo timeline that shows a year of growth in one scroll.
- Warranty Box — A warranty tracker app to store, track and manage product warranties, receipts and expiry reminders, all in one secure place.
Every app has its own page with full details: see all six. Or go straight to the stores:
Free Tools
We also publish free web calculators from our apps — travel packing and budget planners, baking hydration, pizza dough and baker's percentages, coffee and espresso ratios, wine drink windows, plant watering intervals, and a UK return rights checker. No signup, nothing gated.
Contact & Support
Have questions, feedback, or need technical support? Drop us a line at: