10,000+ cats have been assessed with Sylvester

Cat owners and veterinary professionals share how this simple tool has helped them spot discomfort early, improve quality of life, and strengthen the human-animal bond.

“Based on the app results, I took my cat to the vet and discovered he had water in his lungs and low hemoglobin. It saved my cat’s life.”
— Scott, Cat Owner

“…so beneficial for surgery patients because we can monitor pain at home, determine if a recheck is needed, and see if pain meds are working. It will become a key part of our post-op process.”

— Wild Rose Cat Clinic

“Kizmet was nuzzling and purring which made his human think he was happy, but Sylvester’s analysis said otherwise so she called Kizmet’s vet. He was in pain. He was miserable. I didn't know!”
— Linda Hall, 19 Cats and Counting, Pet Life Radio

“My cat Hadley has a severe skin allergy. The app has been an amazing tool to track her flare-ups and show our vet exactly how she is doing between visits.”
— Natasha, Cat Owner

“I didn’t expect it to be so accurate, but it picked up that my cat was in pain before I could tell. It made me get him checked right away.”
— Cat Owner

“I tested this app on 2 of my cats, Chunky, who has chronic kidney disease, and Stormy, who is healthy. It correctly identified that Chunky was in discomfort and Stormy was not. I was surprised at how accurate it was.”

— JL, Cat Owner

“This app really impressed me. My beloved 8-year-old cat was diagnosed with aggressive lymphoma and passed away two weeks later. I ran a photo of him through Sylvester shortly before his diagnosis and it said 100% unhappy. I wish I had used it sooner, it might have given me a clue to act faster.”
— Carolina, Cat Owner

I have enjoyed using your app with my cat my trix. He was a special needs cat. He crossed over the rainbow bridge on Monday. Over the past weekend before he passed I finally got a happy from the app. I was so excited because I have really been spending some good quality time with him. It brings me some comfort knowing this. I thought I’d let you know.
— Cat Owner

“She is having issues and on her way to the vet. This was very precise!”
— Jessica, Cat owner