TailStory is a pet health record app that automatically logs veterinary information through photos and voice, prioritizing data privacy and honest AI assistance without diagnosis or prescriptions. The co-founders built the platform to simplify pet care record-keeping across clinics and borders while maintaining clear boundaries between app capabilities and veterinary expertise.
TailStory, a pet health record app built by two people, runs on €60–200/month. The author reveals that AI inference is cheap (a tenth of a cent per call), and the real costs come from storage, databases, and idle servers—not from AI itself. Four key decisions kept costs down: combining operations, filtering with code before models, caching non-real-time data, and per-user rate limits instead of global ones.