Breed smarter,
track with confidence
Free, privacy-first tools for weight tracking, whelping dates, heat cycles, and gestation — built for real-world breeding workflows.
Litter A — Week 2
4 puppies · Last entry: 2h ago
🗓 Whelping window estimate
Animal Weight Tracker
Record and review animal weights with exact timestamps, milestone notes, and clear visual trends. Designed for breeders who need accuracy during the critical first weeks.
- Multiple animals and groups in one session
- Exact date & time entries with safe edit/delete
- Visual trend charts across the whole litter
- Locally stored — nothing leaves your browser
Free Breeder Tools
Everything you need, nothing you don't
Open instantly — no login, no subscription, no data leaving your browser.
Dog Whelping Date Calculator
Estimate due dates with realistic early and late whelping windows — not just a single date.
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Gestation Calculator
Calculate gestation and incubation timelines across 50+ species — dogs, cats, livestock, birds, reptiles and more.
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Heat Cycle Tracker
Estimate realistic heat cycle ranges from past cycles — supporting informed planning, not rigid predictions.
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Breeding Education
Learn before you track
Evidence-based guidance on canine pregnancy, whelping, growth, and reproductive cycles — written for breeders, not textbooks.
Pregnancy & Whelping
Normal gestation ranges, stages of labor, what's considered typical variation, and how to prepare.
7 articles
📈Growth & Development
How healthy puppy weight gain progresses, why trends matter more than single readings, and when to be concerned.
4 articles
🔄Heat Cycles & Fertility
Understanding cycle patterns, natural timing variation, and how long-term records improve breeding decisions.
3 articles
Our Philosophy
Built for responsible breeders
BreedTools does fewer things — and does them well. No subscriptions, no data collection, no complexity you don't need.
Your data stays yours
All tracking data is stored locally in your browser. Nothing is sent to any server.
Honest about uncertainty
Tools show ranges and windows, not false precision. Calculators support planning — not replace your vet.
Released when ready
No half-finished features. No misleading beta labels. Every tool ships complete and usable.
Free with optional support
All tools are free, always. Optional support helps fund future development — never required.
Start tracking your litter today
Open the Weight Tracker and log your first readings in under a minute. No setup, no account, no waiting.