Algorithm-driven · Beta
Hybrid training that connects lifting, running, recovery, and nutrition.
One system for lifters who run, under one subscription. No more stitching four apps together.
Want to beta test the app? The update list is for news. Beta access is a separate application.
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One system
Four apps' worth of tools. One subscription.
Lifting, running, recovery, and nutrition usually mean four single-purpose apps and four separate bills. Mass in Motion replaces all four with one app on one subscription, and because they finally live together they work off the same data: your training load sets your recovery score, and your weight trend moves your calorie target.
- LiftingStrength, hypertrophy, conjugate-style, or powerbuilding programs that auto-progress, track your estimated maxes, and balance volume across muscle groups.
- RunningEasy, threshold, and interval paces set from your recent performance, with weekly mileage that climbs at a rate your body can handle.
- RecoveryA daily readiness score from training load, HRV, resting heart rate, and sleep that names what is holding you back and adjusts the plan.
- NutritionA fast food logger plus an adaptive calorie engine that retunes your targets each week from what you log and how your weight is trending.
Integrations
Your wearable already knows. Now your training plan does too.
Recovery and run data flow in automatically from the sources below — or log everything by hand if you'd rather not connect anything.
- Apple HealthHRV · Sleep · RHR · StepsSyncing live
- WHOOPStrain · HRV · SleepSyncing live
- StravaRuns · Pace · RoutesSyncing live
- Health ConnectAndroid wearablesSyncing live
- OuraSleep · ReadinessPost-launch
Product tour
See how your training comes together
01
Your training day, decided
Today opens on the scheduled lift or run for that day, with estimated duration up front.
A recovery score and coach notes sit alongside the session so context is visible before starting.
02
Every workout, ready to run
Today's workout lists each exercise with prescribed sets, reps, and load.
Sessions are structured so lifting and running work are tracked in the same log.
03
Strength and running programs together
Programs shows your selected lifting style next to the running plan for the week.
Both disciplines are scheduled in the same system instead of two separate apps.
04
See the complete plan
Program Overview lays out the full multi-week schedule for lifting and running.
Every session ahead is visible, not just the current day.
05
Recovery trends in context
Recovery Trends charts the daily recovery score over time next to training load.
Inputs are drawn from documented recovery data, not a generic wellness score.
06
Strength progress without spreadsheets
Strength Records tracks estimated one-rep max history for tracked lifts automatically.
Progress is logged from completed working sets as they happen.
07
Running targets tied to performance
Race Predictor estimates race-pace targets from recent running performance.
Pace zones update as logged runs change the underlying performance index.
08
Every run in one history
Running History logs distance, pace, and duration for every completed run.
Runs and lifts are both visible from the same account history.
Programs
Lifting and running, programmed together
Traditional strength, hypertrophy, conjugate-style, and powerbuilding plans are scheduled alongside your running mileage in one system instead of two disconnected plans. The complete multi-week schedule is visible up front, so you can inspect what a training block looks like before you start it.
Programs does not promise a particular outcome; it shows the plan the algorithm generated and lets you see every session ahead of time.
Recovery-aware
Recovery guidance you can trace
Daily recovery scoring uses documented inputs such as HRV, resting heart rate, and recent training load to show a recovery window for the day, not a black-box number.
This is training-load guidance, not a medical assessment. See the full methodology for how the score is built.
Adaptive nutrition
The calorie engine that closes the loop
Training is only half the outcome: body composition is won or lost in the kitchen. Whether the goal is dropping fat without losing strength, building muscle without piling on fat, or fueling higher mileage, the adaptive calorie engine keeps your intake matched to what your body is actually doing, so the work you put in training isn't undone by guesswork about food. Same deterministic, transparent approach as the training algorithm, and part of the same subscription, not a separate macro app.
01
Log food and weigh-ins
Scan a barcode, search a database built on USDA and Open Food Facts data, quick-add macros, or reuse saved recipes and custom foods. The day view tracks calories, protein, carbs, fat, fiber, and micronutrients.
02
The engine measures your real energy needs
Instead of trusting a static formula forever, it computes your observed daily energy expenditure from what actually happened: logged intake against your smoothed bodyweight trend.
03
Your targets update weekly
Calorie and macro targets step toward your goal rate (cut, maintain, or gain) in small, capped weekly moves. Rate-of-change limits, calorie floors, and deficit caps follow established energy-balance science, and missing data freezes the target instead of guessing.
In the app
A closer look
Volume that hits every muscle
Weekly sets tracked against your targets, broken down by muscle group.
Goals the plan works toward
Set a target and the programming bends your training to chase it.
Trends, not daily noise
Bodyweight smoothed into a clear signal so you can read the real direction.
Pricing
One subscription covers all of it
Log your own lifts and runs for free, forever. Premium is a single subscription that covers adaptive programming, recovery scoring, pace targets, and nutrition tracking: what would otherwise be several separate apps and several separate bills. Every paid option starts with a 14-day free trial on every plan. Founder pricing is a limited annual offer for the first 50 eligible early members.
Free
$0/forever
Log lifts and runs, track sets with RIR, save routines, and use the exercise library with no subscription.
Monthly
$12.99/month
$12.99 per month after the 14-day free trial.
Annual
$89.99/year
$89.99 per year after the 14-day free trial.
Founder
$64.99/year
$64.99 per year for the first 50 eligible founder members.
FAQ
Common questions
When does Mass in Motion actually launch?
Mass in Motion is currently in beta. The core algorithm, wearable integrations, GPS run tracking, and active workout logger are live in the build. The current focus is real-device QA, App Store and Google Play validation, payment validation, and founder beta preparation before the public launch.
Do I need a Garmin or Apple Watch?
No. Everything works with manual entry - log runs and lifts by hand if you prefer. Apple Health, WHOOP, and Strava integrations are live so HRV, resting HR, sleep quality, and run data can flow into the recovery engine.
Is there a companion watch app?
Not at launch. The app reads from your wearable rather than writing to it. The lock screen Live Activity widget for rest timers and GPS runs works natively on iOS without a watch app.
What makes this different from a lifting app with cardio slapped on?
The algorithm enforces rules most coaches know but apps ignore: heavy lower body is never scheduled within 24 hours of a long run, easy runs default to most of weekly volume, and lower body gym load auto-reduces during peak mileage weeks.
Can I use my own program?
The 5-step custom program setup is live in the build now. Answer questions about your goals, weekly availability, experience level, injuries, and equipment, and the algorithm generates a full multi-week plan.
What happens if I get injured?
Flag the area in settings. The algorithm uses your flag to remove conflicting lifts, suggest lower-risk alternatives, and reduce running load until you clear the flag.
Do I still need separate apps for lifting, running, and macros?
No, that is the point. One subscription covers strength programming, running plans, recovery scoring, and nutrition tracking in one place. Beyond one bill instead of several, the pieces inform each other: training load feeds the recovery score, recovery shapes the next session, and your bodyweight trend tunes your calorie target.
Does it track nutrition too?
Yes. The food logger supports barcode scanning, search across a database built on USDA and Open Food Facts data, quick-add macros, custom foods, and saved recipes. Calorie and macro targets adapt weekly from your logged intake and bodyweight trend, with conservative caps and floors: same deterministic, transparent approach as the training engine.
Does it work offline?
Yes, by design. Every tap writes to local storage first and syncs when connection returns.
Does AI write the programs or pick exercises?
No. Programs are generated by a deterministic algorithm designed and tuned by a human. No language model invents exercises, substitutes lifts, or assembles plans on the fly.
Join the update list
Carry the momentum
Join the Mass in Motion update list for launch news, Founder pricing updates, and product announcements. Want to test the app? The beta is a separate application.
Want to beta test the app? The update list is for news. Beta access is a separate application.
Apply for the beta →