What I'm about to write is about the extent of my knowledge on the subject, so don't assume I know more that justifies my thinking: CBT (cognitive behavioral therapy) has has been shown it can be effective even if done with computer software, and in the UK is something the NHS either offers or pushes people towards (I think, if I remember correctly, using a private company who provides the service online but an NHS referall gives you a code to access it for free). Based on this, I would assume it's perfectly possible to offer a "treatment plan" for "ADHD, anxiety and depression", but I have no idea what regulatory hoops, if any, would need to be cleared. (I also don't know if your parent comment's company does offer CBT, or if not whether what they offer does work.)

The different computer guided CBT programmes are tested for efficacy before they get recommended for use.

Here's some (quite old now) guidance: http://www.nice.org.uk/guidance/ta97

I use that url to give some idea what process is used to assess and recommend computer based CBT.