Adaptive nutrition
Nutrition Tracking Built for Training
Mass in Motion is a hybrid athlete training and nutrition app that brings strength training, running, recovery, and nutrition tracking into one system.
Log food whichever way is fastest
Four routes in, so a meal never goes unlogged
The worst logging outcome is a blank day. Packaged food, a label with no barcode, a restaurant plate, or the same lunch you have every week — each one has a route that takes seconds.
Barcode scan
Scan the package in seconds
Point your camera at any barcode to pull verified nutrition from a catalog built on USDA, Open Food Facts, and athlete-verified data.
Fast and reliable. If a product is not in the catalog yet, add it once and it is verified for the community.
Nutrition Facts scan
Scan the label straight off the packaging
No barcode, or a product the catalog has never seen? Frame the Nutrition Facts panel and serving size, calories, and macros are captured directly.
The numbers come directly from the packaging in front of you, not a generic online lookup that might be a different formulation.
Describe meal
Type what you ate in plain English
"Cheeseburger with onions, pickles, ketchup, wheat bun and kettle chips." Eating out means no barcode, so describe the plate in one line and let the parser split it into items.
Deterministic parsing, not an LLM hallucination. It matches your words against verified catalog servings without ever inventing numbers.
Search & recipes
Search the catalog, or tap something you already saved
Search foods directly, quick-add macros when you already know the totals, scan a barcode, or create a food. Saved recipes and custom foods sit right underneath.
A saved recipe or custom food logs in one tap the next time, so the meals you eat every week stop costing you anything to track.
Trust & verification
Nothing is logged until you say so
Every route through the logger ends on a transparent review screen. You see exactly what was found, what it was matched to, and the portion it assumed. You can adjust servings or swap items before it becomes part of your day.
That matters most when typing what you ate. Each detected item links back to the specific words you wrote, so an estimate is something you can inspect and verify — never a mysterious black-box number you have to take on blind faith.
Adaptive energy balance
Your targets should change when your body changes
Online TDEE calculators rely on static formulas that know nothing about your metabolism. Mass in Motion measures what actually happened: logged calories against your smoothed bodyweight trend.
Observed Burn Measured
Your smoothed weight curve and logged intake reveal your true daily energy expenditure, free from daily water weight spikes.
Weekly Target Check-in
Each week, targets step toward your chosen goal (cut, maintain, or surplus) in small, safe increments.
Physiological Guardrails
Rate-of-change caps prevent severe deficits, calorie floors preserve lean muscle mass, and missing days freeze targets instead of guessing.
Connected system
Nutrition connected to your training
Nutrition isn’t isolated from the rest of your training. Mass in Motion brings your food, lifting, running, recovery, and progress into one subscription.
Your targets move with your body, not with a formula
The engine computes your observed energy expenditure from what actually happened — logged intake against your smoothed bodyweight trend — and steps your calorie and macro targets toward your goal in small, capped weekly moves.
Training is in the same system
Your lifting, running, recovery, and food live in one app on one subscription. The plan does not have to guess what you ate, and your nutrition does not have to guess what you trained.
It is one of the five signals SOREN reads
Nutrition is the N in SOREN, so what and when you ate around training is part of what the research engine studies when it looks for patterns specific to you.
Missing data freezes the target instead of guessing
A few unlogged days will not walk your calories somewhere strange. Rate-of-change limits, calorie floors, and deficit caps follow established energy-balance science.
Early access
Carry the momentum
Join the list and we will email you the launch date and your founder pricing details. Founder pricing is $64.99/year for the first 50 eligible members, against $89.99 normally.
Want to train on it now? Beta testers get the build before launch. Four questions, about thirty seconds.
Apply for the beta →