Puppies & kittens
- Growth guided by the peer-reviewed Waltham research — puppies and kittens each have their own body of evidence.
- Flags faster- or slower-than-expected growth.
- Dog-specific reference curves for small, medium, large, and giant breeds.
Track your pet's weight on their own curve.
Most pet weight trackers compare your pet to a breed average. ChonkPal plots your pet's own trajectory against peer-reviewed growth data — so you can see what's actually happening, over time.
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App Store
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12-week trend
Mar Apr May
Trend view
The difference
Your pet's curve, not the average.
Breed averages are blunt. An ideal-weight Labrador can weigh anywhere from 25 to 36 kg; a healthy Maine Coon cat from 5 to 9 kg. Both hide enormous individual variation — and that's before you factor in age, sex, neuter status, or activity.
ChonkPal plots your pet's own longitudinal weight curve against peer-reviewed growth data. The question becomes whether they're holding their own trajectory — which is a much better signal than matching an average.
Weight (kg) 12 months
Illustrative. The amber line is your pet's own trend; the faint band is where the breed "average" sits.
What it does.
Step 1
Weigh-in
Ten seconds. Bathroom scales, pet scales, or hold-and-subtract — the app tells you which is most accurate for your pet's size and nudges you towards the least error-prone option.
Latest
8.4kg
3 days ago
Holding steady
Weigh-in
Step 2
Reminders & feeding times
Gentle, optional nudges: a weekly weigh-in reminder, feeding-time prompts, and vet-visit reminders if you want them. Each is configurable — turn any of them off. The app tracks trends, not streaks, so skipping a day doesn't punish you.
Today
Weigh-in
08:00 · before breakfast
Breakfast
07:30
Evening meal
18:00
Vet check-up
In 3 weeks
Today
Step 3
Trend view
The direction of travel, smoothed. Daily fluctuation (meals, hydration, full-vs-empty bladder) is stripped out so you see the real trajectory — not a jittery line that looks alarming.
12-week trend
Mar Apr May
Trend
Step 4
Growth charts
For puppies and kittens, growth is guided by the peer-reviewed Waltham research — one body of work per species, both open-access, both from the same Liverpool research team. Flags early if growth looks unusually fast or slow.
Growth · medium
Your puppy Centiles
Growth chart
Step 5
Take a summary to your vet
Export a clean, one-page history of weigh-ins and feeding as a PDF. Bring it to your appointment, or email it ahead. Saves your vet hunting through your camera roll for context.
For your vet
Summary PDF
The research behind it.
Developed by scientists, grounded in published veterinary research. Where the science is uncertain, we say so.
Full references →- Trend smoothing uses Exponentially Weighted Moving Average — the same approach as Libra and TrendWeight for human weight tracking.
- Puppy growth tracking is guided by the Waltham Puppy Growth Charts research ( Salt et al., 2017 ) — open access, based on 6 million+ measurements.
- Kitten growth tracking is guided by the Waltham Kitten Growth Charts research ( Salt et al., 2022 ) — open access, ~22,000 cats, same research team, same method.
- Alert thresholds follow WSAVA and AAHA guidance used by vets worldwide.
- We deliberately never use shame-based language — evidence shows labels like that make weight care worse, not better.
Built for every life stage.
Adult pets
- The real weight trend, not daily noise.
- Optional comparison against breed-typical ranges.
- No calorie counting, no meal plans.
Senior pets
- Catches unexplained weight loss — a recognised welfare marker.
- Tracks muscle-condition score alongside weight.
- Generates a clean weight history for your vet's visits.
Questions we get.
Will it judge me for feeding treats?
No. ChonkPal tracks trends. It doesn't prescribe meal plans or judge treats — those decisions are between you and your vet.
Do I have to weigh my pet every day?
No. Once a week is fine for maintenance. Daily gives slightly faster feedback if you're actively working on weight. The app doesn't reward streaks.
Is this a substitute for seeing my vet?
No. ChonkPal is a tracking tool, not a veterinary service. It does not diagnose or provide veterinary advice. If anything looks worth investigating, it'll say so and produce a summary you can bring to your appointment.
Does it work for puppies, kittens, senior pets, and giant breeds?
Puppies, kittens, and senior pets: yes. Puppy growth tracking is guided by the Waltham Puppy Growth Charts research (Salt et al., 2017; up to ~40 kg adult weight, across five size categories). Kittens are guided by the newer Waltham Kitten Growth Charts research (Salt et al., 2022; ~22,000 cats, same research team). Both bodies of work are peer-reviewed and open-access. Giant dog breeds above 40 kg, and pedigree cats with unusual weight ranges (Maine Coon, Ragdoll, Norwegian Forest): the app still tracks weight but tells you where reference data runs out.
Is my data safe? Where is it stored?
UK-based, UK GDPR compliant, stored in UK data centres. You can export or delete everything at any time. We do not sell your data.
How much does it cost?
The core app is free. If optional paid features are added later, anyone on the waitlist gets a heads-up first.
Ready when you are.
ChonkPal is free. Launching on iOS and Android. Drop your email and we'll send one message the day it's live — no gimmicks, no spam.
Coming soon to
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Coming soon to
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