I might do it at some point in time, but not in the immediate future. I think that I might make a steam version of the game before the iOS version, though.
The thing with iOS is that you need to pay a hundred dollars a year just to develop on their platform, and then you'll need a MAC to export it, plus a few apple devices to test the game on, and I have none of those. That's a lot of expenses that I would only be willing to pay if my game ever gets profitable enough.
I'll wait and see what happens with the android version, first. I have every chapter of the first book except the last one uploaded on my website, though, so you can go read it there, if you want to give it a try. However, while I will probably upload the final chapter of the first book there at some point in the future, I don't think I'll go any further than that, since it would be too difficult for me to monetize this game on a website. Also, the website doesn't work on mobile, so you'll only be able to play the game on a PC if you want to use it. Here is the website.
Keep in mind that your saves from here won't carry over to other platforms, so you'll have to start from scratch when I upload it to steam.
Sorry for the inconvenience.
Mazarin Blues by Alia Hess features AI ‘navigators’ implemented directly into their host’s body. Turns out it’s not such a great idea to trap sentient beings in this manner.
John Wyndham’s Chocky is told from the perspective of a father whose little son comes up with a new and somewhat unsettling imaginary friend.
If you’re open to choose-your-own-adventure interactive stories, I’d also like to recommend Magium (freely available on Google Play) - while it’s not focused on symbiotic relationships, one of its characters hosts another being in her head.
That's serendipitous, I've never found anyone else who plays them!
I remember enjoying the one where you play a vampire in New Orleans (I think free to play?), and Choice of Broadsides- both shorter than Heroes Rise for sure!
There's also an app I downloaded a while back but never played that is supposed to be a giant long text based game called Magium. http://magium-game.com/ Looks like it's available on iOS and android!