How PackByte Works
What happens between your trip details and your food bag.
A food bag is a logistics problem. How many calories a day, how much that weighs, what you can actually eat, and what you can actually buy. PackByte works that problem with fixed rules and a known list of food, in that order. Here is what runs.
Your calorie target is calculated, not guessed
Body weight, age, daily mileage, and elevation gain go into a fixed formula on the server. Same inputs, same number, every time. Climate adjusts it after that, because cold weather costs you more than most people expect.
Nothing in the system estimates this number or rounds it off by feel. The formula is the same one every plan uses, and the target it produces is a hard constraint on everything that follows.
Every item is a real product
The catalog holds 200+ verified items across dozens of brands. Each one is a product you can actually buy, with calories and weight recorded from manufacturer nutrition data, or a verified secondary source when a manufacturer panel is not available.
Your plan is assembled from that catalog and nothing else. Anything that is not on the list gets stripped out before the plan reaches you. That is the difference between a food bag you can walk into a store and buy, and a list of plausible-sounding meals.
Allergens are checked against the catalog
Your allergens constrain the list before anything is picked. Then every finished plan is scanned again, item by item, against verified allergen data covering both what an item contains and what it may contain. The second pass is the one that counts, because it checks the plan you are actually going to carry.
When something violates your rules, the planner looks for a safe replacement in the same meal slot, then a repeat, then a comparable item from another slot. A violating item is never left in a plan. If nothing safe exists, you get a gap card that names the shortfall and tells you to bring something you trust. An honest gap beats a confident guess.
The catalog gets re-checked on a schedule
Products get reformulated. Serving sizes change quietly. Every item carries the date its data was last verified against a primary source, and the catalog is re-audited in rolling batches each quarter so nothing sits unchecked for long.
Recent audits caught meals double-counting calories and a set of items understating both calories and weight against the brand's own panel. That is the point of checking. Data drifts whether or not anyone is watching.
What this is not
PackByte is food logistics planning for general wellness. It is not medical or dietetic advice. Confirm ingredient labels against your own allergies before you buy, because catalog data may not reflect a recent reformulation.