Answer
What should I train today?
DecisionEngine is an iPhone app. Before you train, it tells you what is due today: sport, duration, intensity — with the reasoning.
Is there a weekly plan?
No. One decision for the moment you ask. No plan to work through.
What is the decision based on?
Six signals from Apple Health and your goal. The calculation runs on your iPhone.
Does the app also say no?
Yes. Little sleep or high load gives a recharge day. An infection or injury caps sport and intensity.
Which sports?
Running, cycling, swimming, strength, brick, cross-country skiing and rest.
Do I need an Apple Watch?
No. An iPhone with Apple Health is enough to start.