I don't want you to think I'm knocking the idea of having an app, or searching for an app; I think it's laudable that you're doing something, because it can be so easy to do nothing but complain. My experience though, has been that the brain that I am training, be it using cognitive behaviorial therapy, or an app, is not the 'brain' that will be in control when the crisis that needs the training hits. (Ah, it might help to know I'm labelled bipo and I hold down a full time job in the IT world on a 457 visa). So in the remisssion period, I get CBT, and I find an app that looks like it could help, and I train away.
Then along comes a day when I start finding a hundred apps that look about right, and I register on all of them, and convince myself I can still do productive work whilst getting up to date with my training from a thousand different angles. Exit brain #1, the trained, but vastly over extended brain. Each new app doesn't learn from the last, it means starting from scratch on each, leaving a confused overload reinputting the myriad of different angles.
The apps are not inter-related and one app doesn't know that I'm doing the same on 99 other apps, and so none of the apps are alerting someone that something is going horribly wrong. Each app is just recording that i am not doing so well and so they rate me down for more training.
I do this frantically until one day my brain sort of pops, and I can think nothing, zilch, zippo. I'm spent. Enter brain #2, a brain in stupor. Not only does it not have the intense training of brain #1, it also doesn't have the personal relationship value that I would have attained had I spent the time I was training on a machine with genuine real humans. Now I'm exhausted, I have a million experiences, and I have no one to share them with. No one understands what I have been through, except some google experts someplace noting the frenetic behaviour somewhere on the planet.
Training is great. Apps are great. Doing something to help is great, but always remember that machines don't have empathy - only people do. I would even go so far as to suggest that if you use more that 2 you are investing too much time in technology, when technology won't invest a millisecond on you when you really really need it. People take investing too. It's so easy to end up with no people and no one to tell, and no-one to notice when things are going horribly wrong.