Understand long-term patterns that matter.
Track weeks/months, focus on the symptom that reflects how you feel, and view timeline overlays for meds, stress, sleep and activity.
Compare cause and effect instantly.
Superimpose two time periods to see how starting/stopping meds, sleep, exercise or stress changed your symptoms.
See your tremor at a glance.
Colour-coded daily diary (green → red) that shows tremor & movement plus your notes on meds, diet, exercise and stress.
Background
Why we created this app — a story familiar to many living with Parkinson’s
For many people with Parkinson’s Disease, daily life is filled with small but important questions:
Why am I shaking more today? Did I sleep poorly? Is my medication wearing off too soon? Why do some days feel easier — and others so much harder?
Symptoms like tremor, dyskinesia, and slowness aren’t constant. They rise and fall throughout the day, shaped by medication timing, stress, sleep, food, activity — and sometimes by the unpredictability of Parkinson’s itself. Yet most people are left guessing, trying to remember how they felt last week or whether a new treatment is truly helping.
Our mission is to change that.
We want to give people a clearer window into their own symptoms, to help them see patterns, understand their bodies, and feel more in control — with the support of our app.
What PD-Trends Does
PD-Trends helps people with Parkinson’s understand their symptom patterns by combining smartwatch measurements with daily-life information into clear, meaningful insights.
PD-Trends is a smartphone app that helps people with Parkinson’s understand how their symptoms fluctuate by combining high-resolution smartwatch data with daily-life information. Tremor signals are captured using the MM4PD API (Powers et al., 2021), while movement, activity, and other health metrics are retrieved from Apple Health. These data streams are merged on the device and converted into time-resolved graphs—at 10-minute, hourly, daily, or weekly resolution—allowing users to see how medication timing, sleep, stress, diet, or activities relate to changes in tremor, dyskinesia, and bradykinesia. Current versions export the data to a secure cloud for deeper correlation analysis, and upcoming versions will add on-phone graphic overlays, automatic summary report generation with AI-based insights, and support for Android-connected devices through custom-developed algorithms.
Testimonials
Hear directly from our users about how PD-Trends makes managing Parkinson’s easier and more insightful. From tracking daily symptoms to understanding the impact of lifestyle choices, our community shares real experiences and practical benefits. See how PD-Trends helps people take control of their health and make informed decisions alongside their healthcare providers.
“Now having used PD-Trends for six months, I found it easy to use, with many options to record medication moments, and other relevant information into the app. It further provides an hourly insight in tremor development during the day with scrollable weekly, monthly and three-month overviews. I found this extremely helpful to understand my own response to diet, sleep, exercise, and stress, but also in my visits to my neurologist.”
Anthonie Jongsma
Parkinson’s Advocate
Interested?
If you’re interested in supporting, partnering, or using PD-Trends, please contact us to get involved in advancing this innovative, user-friendly app for people with Parkinson’s.
Our team
A passionate family team dedicated to making daily life with Parkinson’s easier
Maarten Jongsma
researcher and a PwPD
Pieter Jongsma
data analist, app developer
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