Imagine doing something every single day, multiple times a day, for the rest of your life. Now imagine that if you do it in the wrong place too many times, it stops working. Not dramatically. Not all at once. Just quietly, gradually, less effectively, until one day your blood sugar is harder to control and nobody can quite explain why.

That's the reality for millions of people who inject insulin or GLP-1 medication daily. Rotating injection sites isn't optional. It's clinical guidance that exists for a real reason: injecting repeatedly into the same spot causes the tissue to harden, and hardened tissue absorbs medication unpredictably. The condition even has a name, lipohypertrophy, and studies suggest it affects the majority of regular injectors to some degree.

The guidance is clear. The tracking, until recently, was a notebook. Or a mental note. Or nothing at all.

When I started researching this space, I kept coming back to the same question: why hadn't anyone built something that actually helped with this? Not a general health tracker with an injection field bolted on. Something designed from the ground up around the specific, physical, spatial problem of remembering where you injected last time, and making sure you don't go back there too soon.

The answer, I think, is that it's easy to underestimate how hard the problem is. Injection sites aren't just left or right. They're specific zones across the abdomen, thighs, upper arms, and glutes, each subdivided into smaller areas that need to be cycled through in sequence. Keeping track of that across weeks and months, while managing everything else that comes with a chronic condition, is genuinely difficult.

Drop started from that gap. Not from a product brief or a market opportunity, but from the recognition that something real and important was falling through the cracks of existing tools, and that the people it affected deserved something better.

Rotation isn't the most dramatic part of living with diabetes or a GLP-1 regimen. It rarely makes the headlines. But get it wrong consistently, and the medication you depend on becomes less reliable. Get it right, and everything else works better.