Why I’m Building OS Health: An AI Health Coach for Personalized Daily Health Decisions

The Problem With Most Health Apps

Over the last ten years, I’ve become increasingly interested in health, fitness, recovery, and longevity. Like many people, I’ve tried different programs, apps, wearables, supplements, and coaching approaches. Some worked better than others, but I always found myself running into the same problem.

I had plenty of information, but I still wasn’t always sure what I should do.

Should I work out today or take a recovery day? Should I push harder or back off? Should I focus on strength, cardio, mobility, or sleep? Every app seemed to give me more data, but very few helped me make decisions.

How AI Changed My Health Routine

About a year ago, I started experimenting with AI in a way that was much more personal. I began feeding it workout history, health information, recovery metrics, DEXA scans, wearable data, and notes about my goals. Over time, it developed a surprisingly deep understanding of my situation.

What I discovered was that the value wasn’t in the analysis itself. The value was having a trusted answer to a simple question:

“What should I do today?”

The recommendations weren’t perfect, but they felt personal. The system knew what equipment I had available, what exercises I liked and disliked, where I had struggled in the past, and how I was recovering. Instead of following a generic program designed for millions of people, I was following something that felt like it was designed specifically for me.

The result was the most consistent period of training I’ve ever had.

What Is OS Health?

That experience eventually led me to start OS Health.

The vision is straightforward. Most health tools help people collect information. I want to explore whether AI can help people turn that information into better daily decisions.

The idea isn’t to replace doctors, trainers, or common sense. It’s to help answer the question many of us face every day:

“What should I do next?”

OS Health is being designed for people who use wearables such as Garmin and Apple Health and want personalized guidance based on recovery, workout history, and health goals. Instead of providing more dashboards and charts, the goal is to provide a clear daily recommendation that helps users decide what to do next.

I’m still very early in the process. The company has been formed, the website is live, and I’m currently interviewing people to understand how they make decisions about their health, fitness, recovery, and longevity.

I don’t know exactly where this will lead, and that’s part of the fun. Right now I’m focused on learning, talking to people, and figuring out whether the problem I’m trying to solve is something others experience too.

I’ll share what I learn along the way.

— Mark

If you’re interested in personalized health coaching, wearable technology, longevity, or AI-powered health tools, I’d love to hear from you. You can learn more at oshealth.coach.

How I Use AI to Run Enterprise Deal Reviews

I’ve sat through a lot of deal reviews over the years. Most of them follow the same pattern. Someone walks through a deal, gives their perspective on where things stand, and outlines what they think the next step is. On the surface, it sounds fine, but underneath it, you’re usually getting a filtered version of reality.

Not intentionally. It’s just human nature. We all tend to tell the story we want to believe about a deal, especially when we’ve invested time in it. What’s usually missing is a clean, objective look at what’s actually happening. That’s what pushed me to start experimenting with AI in my own deal reviews.

I didn’t go into this thinking I was going to reinvent anything. I just wanted a way to step outside the narrative and look at deals more clearly without spending a ton of extra time doing it. What I found pretty quickly is that AI is useful in a very specific way. It doesn’t replace judgment, and it doesn’t close deals, but it’s very good at forcing structure and asking better questions than most people naturally do in the moment. That alone changes the quality of the conversation.

The way I use it is pretty simple. I take whatever I have on a deal. Notes, emails, sometimes call transcripts, sometimes just a written summary. Nothing polished, just the raw material. From there, I’m not asking AI to tell me whether the deal is good or bad. I’m using it to break the deal down in a way that’s harder to do in your head when you’re moving fast.

The first thing I care about is who’s actually involved. In a lot of deals, especially enterprise, there’s a difference between who you’re talking to and who’s actually making the decision. That gap is where things fall apart. AI is surprisingly good at surfacing that. It forces you to look at whether you really have coverage or if you’re relying too heavily on one person.

From there, I’m looking at risk. Not in a vague way, but in a very direct way. What’s missing? What assumptions are being made? Where could this stall? When you run a deal through that lens, patterns start to show up. Weak access to decision makers. A business case that isn’t fully formed. Stakeholders that aren’t aligned. Things that are easy to gloss over when you’re just trying to keep momentum.

The part that’s been the most useful for me is using it to pressure test thinking. It’s easy to get locked into your own view of a deal, especially if it feels like it’s moving in the right direction. Having something push back on that, even imperfectly, is valuable. It’s not that AI is always right. It’s that it doesn’t get attached to the deal the way we do. It will call out things that a rep might not bring up or that a manager might miss if they’re trying to move quickly.

Where this really shows up is in the next step. A lot of deals don’t stall because of some major issue. They stall because the next step isn’t clear enough or strong enough to move the deal forward. “Follow up” isn’t a next step, and neither is “check in.” What I’m looking for is something specific. Who is doing what, with whom, and what needs to happen for that step to be considered successful. Running that through AI forces a level of clarity that’s easy to skip otherwise.

The net effect is pretty straightforward. The deals get cleaner. The conversations get more honest. And you spend less time circling around the same issues week after week.

I don’t think AI is going to replace salespeople. If anything, it’s going to make the gap between good and average a lot more obvious. The people who already think in a structured way will get faster and more effective. The ones who rely on instinct without structure will start to get exposed. For me, this is just a tool to make sure I’m staying on the right side of that.

If you’re experimenting with this kind of thing, I’d be interested to hear how you’re approaching it. Everyone seems to be figuring it out in their own way right now.