MochiQuick disclaimer up front: this is not medical advice. Your dose, your schedule, and any changes to them are between you and your prescriber. This post is about the logistics, because the logistics are where most people quietly fall apart.
Here's a scene anyone on a weekly peptide knows. It's Thursday. You're holding the vial, and you genuinely cannot remember if the last dose was Sunday or Monday. You scroll your camera roll for clues. You check your texts. You consider just... vibing it.
Weekly schedules are weirdly hard for human brains. Daily habits stick because they attach to something (coffee, toothbrush, alarm). A once-a-week event attaches to nothing. And if you're on something like tirzepatide where the day matters, "I think it was Sunday?" is not a great data point.
The four things actually worth tracking
1. The dose day, logged the moment you take it. Not in your head, not "I'll write it down later." The entire value of a dose log is that it's boring and complete. One tap, timestamped, done. This is the difference between knowing your next dose is Friday and reconstructing your week like a detective.
2. Your appetite through the cycle. If you're on a GLP-1, you already know the feeling: the days right after a dose where food is just... optional, and the tail end of the week where snacks start whispering again. That pattern is real, it's personal, and it's incredibly useful to see in your own data. Log your meals normally and the curve reveals itself: average intake on fresh-dose days vs wearing-off days.
3. Your weight trend, not your daily weight. Daily weigh-ins wobble with water and salt. What you want is the line over weeks, anchored to when you started. One weigh-in every few days is plenty.
4. How many doses are left in the vial. This is the one everyone skips and then regrets. Doses per vial divided by your schedule is a date on the calendar, and if reordering takes a week, you want to know that date well before you're holding an empty vial on dose day.
Snap a photo of your meal. We'll do the math.
The appetite curve is the underrated part
Most people track the dose and ignore the food side. But the food side is where the interesting information lives. When your intake data sits next to your dose data, you can see things like: you eat about 300 more calories a day in the last two days of your cycle, or your protein falls off a cliff on fresh-dose days because nothing sounds good.
None of that is a problem to fix by yourself. It's information to notice, and honestly, it's the kind of thing worth bringing to your provider, because "here's my logged intake across four dose cycles" is a much better conversation than "I feel like I eat more sometimes."
The system, in practice
You could do all of this with a spreadsheet, a wall calendar, and five phone alarms. People genuinely do. But it's four separate systems for one habit, and every separate system is another place to quietly stop.
This is exactly why we built peptide tracking into Calchi. You add what you're on (semaglutide, tirzepatide, BPC-157, and the familiar brand names all work), set your schedule once, and then: a reminder when a dose is due, one tap to log it, an adherence view so you can see your consistency, and a runout predictor that tells you when to reorder before the vial runs dry. Your meals and weight are already in the same app, so the dose-and-appetite picture builds itself while you live your life.
One habit, one place, no detective work on Thursday.