TendTail: Cat Health Tracker
Kidney, Weight, Meds & Vet Log
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
An easy way to track your cat's kidney care: weight, water, sub-Q fluids and meds. Bring your vet a clear, one-page picture at every visit.
If your cat has chronic kidney disease (CKD, what a lot of owners still call CRF), you already know the routine. The weigh-ins. The water bowl you keep half an eye on. The food dish. The sub-Q fluids. TendTail keeps all of it together, so the things that matter don't slip past you.
It does one thing: helps you give your cat more good days, and helps your vet see the whole picture.
WHAT YOU CAN TRACK
• Weight, water, appetite and sub-Q fluids, in a few taps a day
• Medications, and the days you actually gave them
• Vet visits and the renal bloodwork your vet watches: creatinine, SDMA, phosphorus, BUN and more
• A symptom or a quick note the moment something feels off
SEE THE TREND, NOT JUST TODAY
One weigh-in doesn't tell you much. Weeks of them tell a story. TendTail charts weight, appetite and water over time so you can see whether the numbers are trending up or holding steady, and catch a slow drop early, while there's still room to act with your vet.
A CLEAR RECORD FOR YOUR VET
When a check-up comes around, export a clean, readable PDF with the trends, bloodwork and notes together, and share it however you like. No more scribbled numbers, or trying to remember when the appetite changed.
BUILT FOR THE LONG HAUL
• Reminders you can miss without breaking anything. A skipped day is just a skipped day.
• More than one cat? Add as many as your household needs.
• Plain language, no jargon.
• Made for cats with CKD, and just as useful for any senior cat whose health you're watching closely.
YOUR DATA STAYS YOURS
TendTail keeps your cat's health records on your phone. No account, no sign-in, and your cat's data never leaves your device. The only thing we collect is anonymous usage stats — never your cat's health data — to help improve the app. No ads, and we'll never sell your data.
A NOTE FROM US
TendTail is a tracking and record-keeping tool to use alongside your vet. It doesn't diagnose or treat anything, and it isn't a substitute for professional veterinary care. Always talk to your vet about your cat's health.
Made by a cat person, for cat people.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• Introducing TendTail Plus — a once-off unlock for vet-visit PDF reports, sitter and memorial exports, and the 3-month and all-time trend views. Everything you already track stays free.
• You can now send feedback to us right from Settings.
• Reliability improvements and small fixes.
The developer, Ashley Weyers, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Ashley Weyers
- Size
- 35.7 MB
- Category
- Medical
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- TendTail Plus $4.99
- Copyright
- © 2026 Digital Brain