From a personal record to Trendwell
Claes Parflo
The work began with notes and a timeline. It developed into a way of applying consistent definitions to available Apple Health data, then into a native app.
That app is Trendwell. Its purpose is to make recorded patterns easier to review, with the evidence and uncertainty still visible.
What the app produces
Trendwell generates Daily and Weekly reports on your device. The Daily report describes the current reporting window. The Weekly report brings together the available pattern across days and comparisons with recent periods.
The findings come from defined rules. The same inputs, settings and calculation version produce the same findings. This consistency helps with review, but it does not make every period comparable: new data, gaps in coverage and different recording conditions still matter.
The reports describe patterns without giving a health score or telling you what to do. A state label such as Stable refers to the recorded evidence under Trendwell’s rules. It is not a verdict on your health.
Read it, keep it, share it
The in-app graphics provide a visual overview, and the report text provides supporting detail. You can copy or share that text, or keep a PDF over an available selected range.
If you choose to give a report to an external AI service, that is a separate workflow. The service may help explain terms or compare supplied periods, but any added interpretation is its own output. It should not change what Trendwell originally reported.
What it does not establish
Trendwell is not a medical device. It does not diagnose, recommend treatment, prescribe activity or determine whether you are safe to exercise. It cannot recover events or measurements that were never recorded.
The intended result is modest and useful: a consistent description of the available data, a clearer view of change and a record you can inspect for yourself.
Trendwell reports and AI workflow