The direct answer
Is there an app or tool that builds a training plan for your dog's behaviour problems?
Yes. Several products — ours included — take a structured quiz or a video of your dog and generate a personalised, week-by-week training plan for problems like leash reactivity and separation anxiety. The honest version of that answer comes with two caveats, so here they are before the product list.
The severity gate. An app-built or AI-built plan is a reasonable tool for mild-to-moderate problems. It is the wrong tool for a dog with a bite history, sudden-onset behaviour change, self-injury, or severe separation anxiety — those need a qualified behaviour professional, and for the medical-adjacent cases a veterinary behaviourist. For us that is not small print: we refund and refer those cases rather than sell into them.
The two questions to ask before you pay. Is the pricing one-time or a subscription, and does a human being ever review what the tool produced for your dog? No tool in this category, ours aside, currently publishes a yes to both — most are subscriptions, and most deliver the generated plan exactly as generated. The table answers both questions for every named tool.