Oddlo: Cat Behavior Checker
Cat symptom quick-check
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Is your cat acting strange? Oddlo turns your vague worry into specific observations you can discuss with your vet. Observation only — not a diagnosis.
Cats can't talk, so unusual behavior is often the only warning sign they can give — but it's hard to put "something feels off" into words.
Oddlo is a cat symptom quick-check and observation journal. Starting from "Does your cat do XXX?", it guides you through behavior categories to find likely causes, red flags that need urgent vet care, and simple at-home checks — all written in plain language, no medical background needed.
SYMPTOM CHECK
- 16 behavior categories covering diet, litter box habits, coat, and more
- Clear "see a vet soon" warnings for urgent situations
- Log symptoms, severity, and notes as you notice them
SENIOR CARE
- 26 questions across 8 areas to track subtle changes in vocalization, interaction, sleep cycles, and more
- Fill in one category or one question per page, and save drafts to finish later
- See how each answer changes over time — no scores, no automatic judgments
CAT HARMONY
- Record how many litter boxes, food bowls, water bowls, elevated beds, and scratchers you have, and where they are placed
- Step-by-step new-cat introduction plans with notes and observations
- Log interaction events between your cats to review later
VET SUMMARY
- Keep separate records for multiple cats
- Combine symptoms, senior observations, and interaction events into a 30, 90, or 180-day summary; copy the text or create a PDF to share with your vet
MORE
- Three interface styles: Lamplit Journal (deep green with amber light), A Room at Night (warm wood with orange light), and Bedside Index (ink blue with moonlight)
- Traditional Chinese / English / Japanese / Korean interface
- No account or login needed — everything stays on your device
IMPORTANT
Oddlo is an observation and note-taking tool for pet owners. It is not a substitute for professional veterinary diagnosis. If your cat shows unusual behavior, please consult a vet.
The app is free with a banner ad; a one-time in-app purchase removes ads permanently.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Oddlo now brings senior-cat observations and multi-cat care together. Track day-to-day changes with 26 questions, view trends, manage household resources, new-cat introductions and interaction events, and create a PDF summary for your veterinarian.
Each of the three interface styles has its own palette: deep green with amber light, warm wood with orange light, or ink blue with moonlight. The whole app changes color as soon as you apply a style.
For record-keeping only; not a diagnosis.
The developer, YICHIN TENG, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Location
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- YICHIN TENG
- Size
- 91.6 MB
- Category
- Lifestyle
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
13+
- 13+
- Infrequent
Medical Treatment information
Contains
Advertising
Health or Wellness Topics
- In-App Purchases
Yes
- Remove Ads $2.99
- Copyright
- © 2026 Yichin Teng