Fin Haven

FinHaven is a companion for freshwater aquarium keepers. It helps you pick species that live well together, keep their water within range and stay on top of the maintenance that keeps a tank clear. Describe your aquarium once and the app does the remembering. What you can do - Build your Lagoon: name your tank, set its volume, type and water values, then add dwellers with a tap - Read the tank's health: a bioload meter rates stocking as Light, Balanced or Overstocked, and a compatibility check explains specific risks such as fin-nipping or lonely schooling fish - Browse a species atlas of more than thirty freshwater fish, from tetras and livebearers to cichlids, catfish, labyrinth fish, barbs and loaches - Explore World Waters: filter fish by the Amazon, Southeast Asian streams, African lakes and Central American rivers - Open a full species profile: temperament, care level, water parameters, feeding, minimum tank size, school size, tank mates, origin and habitat - Run a care programme: New Tank Cycle over four weeks, a seven-day maintenance ritual, a two-week planted starter or a ten-day fish-in rescue, each laid out as a calendar you tick day by day - Learn from care guides on the nitrogen cycle, feeding without overfeeding, reading behaviour, algae control, quarantine and proper water changes - Ask the AquaSage: free-form questions, a symptom-based diagnosis with likely causes, treatment steps and urgency, or stocking suggestions built from your actual tank profile - Collect pearls: twelve milestones, a daily streak and a keeper rank that grows with completed tasks - Switch between litres and gallons, Celsius and Fahrenheit, and turn on gentle task reminders The AquaSage runs on OpenAI's gpt-4o-mini model and needs no account or key; nothing is sent until you ask. Every other part of the app works fully offline. Nothing you record is uploaded anywhere: your tank, progress and conversations live only on your device.