A notebook is a valid option.
An app is useful only when it makes a real task easier. A suitable program, a simple calendar, and a short log may already solve the main problem. You do not need a subscription or a connected watch to use our planning resources.
Define the full workflow before adding more services: where the schedule lives, how you record a change, and where completed sessions are stored. Keep a way to retain useful information when you stop using a product. A smaller system that you understand is often a better planning choice than a collection of features you rarely use.
Keep your judgment in the process.
Notifications and charts do not replace your experience or individualized advice. A scheduled run may still be inappropriate when you are unwell or the route is unsafe. Treat the tool as a way to organize information, not an authority that overrides a health concern.