Synteel

Synteel is a phone app that helps small eel farmers in Indonesia keep glass eels and elvers alive through the first 12 weeks of the nursery stage. Glass eels are tiny and see-through, and pond water can turn bad within a few hours. Most deaths happen at night, when nobody is watching. Small farms have no oxygen meter. They measure temperature, pH and TDS once or twice a day and keep the numbers in a notebook or in their heads. Our partner farmer in Sleman, Yogyakarta, runs six ponds alone and says only about 20 to 40% of glass eels survive to the elver stage. Synteel turns what the farmer already does into records and warnings: - Talk at the pond. One voice note about several ponds, in Indonesian or Javanese, becomes per-pond readings the farmer confirms. - Photograph a meter display or a handwritten notebook page, and it becomes readings. - Every 30 minutes the server estimates each pond's water temperature and night oxygen risk from the weather and the latest readings, then builds a check schedule with night alarms. It also rates tonight's power-cut risk from Open-Meteo and the BMKG village forecast, because aerators stop when the power goes out. - An evening briefing agent reads the farm through tools and writes tonight's summary and extra checks. - When eels die, one photo goes to SAM 3.1 to count them, and a case agent follows the die-off across days, asks the farmer up to two questions and drafts a WhatsApp message for the owner. Synteel runs in production today at eel.synt.fun/app for real farm accounts, with automatic failover across three model providers, rule-based alarms that work without any model, daily database backups and 206 automated tests. Safety: Synteel gives decision support. It does not diagnose disease or dose medicine. Alarms come from fixed threshold rules that run without a model, and every AI reading is a draft the farmer confirms before it is saved. The app runs in Indonesian and English, in the browser and as an Android app. "Try the demo" gives each visitor their own demo farm with real Meta models: https://eel.synt.fun/preview/?lang=en