Chronlo: Pet Chronic Care
Kidney Diabetes Heart Tracker
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Track pet health and blood tests with photos, trends and care reminders
Chronlo is a health-tracking companion built for cats and dogs living with — or at risk of — chronic conditions. It helps you catch subtle changes day to day, gives you complete records to discuss with your vet when it matters, and puts trustworthy pet-safety knowledge one tap away.
DAILY LOG IN SECONDS
Track weight, appetite, water intake, and activity level. Trend charts make long-term changes obvious at a glance.
BLOOD TEST RECORDS
Choose a general checkup, kidney follow-up, diabetes follow-up, heart tests or another purpose. Manually enter the test date, results, units, report reference ranges, clinic and analyzer. Attach photos for checking, edit or delete records, and export blood test records as CSV.
Trends group results by test, unit, clinic and analyzer. Free users can view the last 30 days of blood test trends; Pro includes full history. All saved reports and blood test CSV exports remain accessible regardless of this chart limit.
Read 14 blood test guides and anonymized report examples offline, using the same blood test content as the updated Maozhidao website. Examples are educational and do not become your pet's records.
SMART RULE-BASED ALERTS
Not a black-box AI guess — clear, explainable logic modeled on real clinical patterns:
• Weight drop alert: flags a significant drop over 30 days
• Diabetes pattern: normal/increased appetite + weight loss + increased water intake
• Kidney disease pattern: reduced appetite + weight loss + increased water intake
Every alert comes with a suggested next step.
BUILT-IN PET SAFETY ENCYCLOPEDIA
13 articles, including preparing for a vet visit, covering chronic conditions (kidney disease, diabetes, heart disease, joint disease, tumors, heartworm, FeLV/FIV), vaccination guidance, and upper respiratory infections — plus the warnings owners most often miss: which foods and plants are toxic to cats and dogs, hidden risks from household products and human medications, and a home-safety checklist. Written for fast reading when every minute counts.
HEART HEALTH HOME MONITORING
Sleeping respiratory rate counter — the standard home-monitoring method veterinary cardiologists recommend for pets with diagnosed heart disease. Tap to count breaths for 30 seconds, get an instant breaths-per-minute reading, and track the trend over time.
MEDICATION / VET VISIT REMINDERS + VACCINATION LOG
Set reminders for medication times and vet appointments. Log every vaccination's date, injection site, and photo, with a nudge to rotate sites each year to lower the risk of feline injection-site sarcoma.
DAILY INTAKE CALCULATOR
Estimates daily calorie and water needs based on weight and life stage (adult, weight loss, growing kitten/puppy, etc.), and converts that into recommended food grams. Formulas sourced from the Merck Veterinary Manual and similar verified veterinary references.
MULTI-PET SUPPORT
Manage multiple cats and dogs in one app, each with its own logs, alerts, and trend charts.
YOUR RECORDS, ANYWHERE
Export your pet's history as a CSV file or PDF report to share with your vet or analyze yourself.
CHRONLO PRO (OPTIONAL)
Daily and blood test records, basic reminders, the encyclopedia and respiratory rate counter are free. Chronlo Pro unlocks full diabetes/kidney combo-pattern analysis, complete trend history, multi-pet management, and PDF report export.
IMPORTANT
Chronlo is not a diagnostic medical device. All alerts, thresholds, and encyclopedia content are for observation and education only, not a substitute for professional veterinary judgment. Please consult your vet if your pet shows any concerning symptoms.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
New blood test records: choose a general checkup or kidney, diabetes or heart follow-up. Enter results, units and report reference ranges manually, with photos for comparison.
View trends grouped by test, unit, clinic and analyzer, and export blood test records as CSV.
Explore 14 blood test guides and anonymized report examples to prepare questions for your vet.
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:
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
- Contact Info
- User Content
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- YICHIN TENG
- Size
- 91.2 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
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Chronlo Pro Yearly $14.99
- Chronlo Pro Monthly $1.99
- Copyright
- © 2026 MaxTeng