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Your Daily Companion for Stiffness Relief
Understand Your Body. Track Your Stiffness. Reclaim Control.
Download Unstiff app for iOS to track joint stiffness and health trends
Calendar view in Unstiff app showing daily stiffness scores and symptom logs
AS tracking app interface
Award winning app for back pain
Stiffness trend chart based on user input over time.

What does Unstiff App?

Unstiff is a health tracking app built specifically for people living with chronic conditions that cause joint stiffness and inflammation — such as Ankylosing Spondylitis (AS), Rheumatoid Arthritis (RA), and other autoimmune disorders. We help you understand your body, track your symptoms, and discover what works for you.

Track What Matters, Every Day

Unstiff makes it easy to log the most important factors that influence your stiffness

Stiffness Score

Rate your stiffness level daily on a simple 1–10 scale.

Diet

Record what you ate — gluten, dairy, fried food, clean meals, and more.

Medications

Log how many pills or vitamins you took.

Stress & Exercise

Did you move? Did you rest? Did stress take over?

Climate Conditions

See how humidity, temperature, and weather affect you.
AI-generated stiffness report

AI-Powered Insights Tailored to You

We go beyond charts and numbers. Unstiff uses AI to analyze your long-term patterns, helping you spot triggers and identify trends. Does your stiffness increase after a stressful day? Are flare-ups linked to certain foods? Is cold weather making things worse? Unstiff connects the dots — so you can take action.
Unstiff AI

Privacy First, Always

Unstiff does not provide medical advice or diagnosis. We believe in empowering you with your own data — stored securely and privately in our EU-based data centers.
You control what you share, and with whom.
Unstiff AI

Why Users Love Unstiff

A comment from a user of Unstiff
Before Unstiff, I felt like my symptoms were random. Now I understand the patterns. It gave me back a sense of control.
— James, 31
A comment from a user of Unstiff
It’s like a journal, but smarter. The stiffness reports made my last rheumatology appointment so much more useful.
— Eddy, 35, AS warrior

For People Living with Chronic Stiffness — By People Who Understand It

Unstiff isn’t just a health tracker. It’s a step toward clarity, confidence, and better living.