More good days
with the cat you love.
A kidney diagnosis is frightening. Tendtail makes the daily care feel manageable — log weight, water, appetite and fluids in seconds, catch small changes early, and walk into every vet visit with a clear picture.
For the 2am “is he getting worse?” question — and the relief of actually knowing.
Built by a cat owner. No ads, we never sell your data. Free to download.
Chronic kidney disease is the most common illness in older cats. You can’t cure it — but spotting decline early lets your vet act sooner, and that buys real time. The numbers are stark:
Cats diagnosed at stage 2 live a median of 1,151 days from diagnosis. Stage 3 is 778 days. The earlier it’s found, the more good time you get.
Boyd et al., 2008 · J Vet Internal MedicineBy stage 4, median survival drops to about 103 days. The gap between early and late isn’t small — it’s years. Home monitoring is how families notice sooner.
Boyd et al., 2008 · J Vet Internal MedicineWeight loss begins before CKD is diagnosed, accelerates after, and predicts shorter survival. A kitchen scale and 10 seconds a day is a genuine early-warning system.
Hall et al., 2016 · J Vet Internal MedicineVets recommend serial home monitoring of weight, appetite and hydration alongside check-ups. Tendtail makes that habit effortless — and turns it into something your vet can read at a glance.
No spreadsheets, no guilt, no clutter. Just the few numbers that matter, captured in seconds, shown back to you gently.
One-tap daily check-ins
Weight, food, water, appetite, sub-Q fluids, meds — whatever your cat needs, logged in about twenty seconds. Skip a day and nothing breaks; Tendtail never shames you for a hard day.
- ✓ Pre-set your cat’s routine once, then just tap
- ✓ Track multiple cats from one home
- ✓ Gentle reminders you can turn off any time
See decline before it becomes a crisis
Day-to-day, weight and water barely seem to move. Over weeks, the trend tells the truth. Tendtail watches the line for you and gently flags when something’s drifting — so you can call the vet early, not after.
- ✓ Weight, water and appetite trends at a glance
- ✓ A kind nudge when a number starts drifting
- ✓ Reassurance on the good weeks, too
A report your vet will actually read
One tap turns weeks of check-ins into a clean, one-page summary — weight curve, hydration, appetite, meds given. No more “I think he’s been drinking more lately?” Bring the picture, get better care.
- ✓ Share as a PDF before every appointment
- ✓ The trends vets ask about, already plotted
- ✓ Your notes and questions in one place
| Date | Creat. | SDMA | Phos. |
| 1 Apr | 2.1 | 14 | 4.6 |
| 31 May | 2.4 | 17 | 5.1 |
Food & meals
Log each meal by amount, wet or dry, and the brand — as many as you feed in a day.
Meds on a schedule
Set the times once. Tendtail builds the reminders and ticks off each dose for you.
Bloodwork, kept together
Creatinine, SDMA, phosphorus and more in one place, ready to drop into the vet report.
More than one cat
Each cat keeps its own logs, routine and reminders. Switch between them in a tap.
A sitter care-sheet
Going away? Share a simple PDF of the routine, meds and your vet with whoever's helping.
A gentle goodbye
If a cat passes, a calm memorial keeps their record and saves a small keepsake to hold onto.
Scattered and easy to lose
- ○ Numbers in Notes, on paper, in your memory
- ○ No way to see the trend that actually matters
- ○ “Has he lost weight?” — you’re not sure
- ○ Scrambling to remember it all at the vet
Gentle, clear, and on your side
- ● One calm place for every check-in
- ● Trends that flag decline early
- ● A vet-ready report in one tap
- ● Built by a cat owner — free for founders
Add your cat
Name, weight, stage if you know it, and the care they’re on — fluids, meds, diet. Two minutes, once.
Log in seconds
Each day, tap what you did and how they seemed. Tendtail quietly builds the trend in the background.
Catch changes early
Get a gentle heads-up when a number drifts, and bring a clear report to every vet visit.
Tendtail is free on the App Store. A couple of taps a day, and a clearer picture for you and your vet.
Free · iPhone & iPad · we never sell your data