Dog breeders have been managing litters in spreadsheets or paying for clunky native apps that only work on iPhone. BreedTools is a PWA that works on every device — track weights, health records, and milestones, then share a live public puppy page with buyers. Built-in buyer pipeline, e-sign contracts, progesterone tracking, COI calculator, and 289 breed growth curves. Free tier, no credit card required.