OPEN BETA · Free while we build it · Ends Oct 15 · Join the beta
NOW TRACKING GLP‑1 DOSES

Training that knows what week it is.

Bestie reads your cycle and your wearable, then builds the week’s sessions around where your body actually is.

75+
BETA TESTERS
3,000+
SESSIONS PLANNED
4.9
TESTER RATING
Join the beta
FREE IN BETA · NO CARD ·
LEAVE ANY TIME
TODAY
DAY 3 POST-DOSE
Lower body, heavy

Your energy usually returns around now. Bestie moved your heaviest lift here.

PHASE
Follicular
SETS
5×5
PROTEIN
112 g
Works with any wearable that writes to Apple Health
Apple Health ŌURA Garmin WHOOP Strava Polar Peloton Withings Suunto Apple Health ŌURA Garmin WHOOP Strava Polar Peloton Withings Suunto
Your data stays yours
You decide what’s shared
Never sold, ever
No brokers, no ad networks
Evidence-based method
Grounded in published research
Free while in beta
No card, leave any time
The muscle question

Losing weight fast is not the same as getting stronger.

THE EVIDENCE
About a quarter of the weight lost is muscle. Sometimes more.

Trials put it near 25% on a diet and near the same on incretin medication — closer to 35% on semaglutide. Adding resistance training is the one thing shown to move that number.

Medication alone
26% The rest is fat
Medication plus supervised training
12%
0All weight lost
EISA ET AL., LEAN MASS CHANGES WITH INCRETIN THERAPY VERSUS LIFESTYLE INTERVENTION
DIABETES, OBESITY AND METABOLISM, 2026 · 20 RCTs · 15,782 PARTICIPANTS
BAR FIGURES: S‑LiTE TRIAL, REPORTED IN THAT REVIEW
Weight coming off includes muscle
Resistance training is the standard way to protect it. Most training plans are not built around that.
Energy can dip after a dose
Then it comes back. A plan that ignores the pattern asks for a best effort on the worst day.
The cycle keeps running underneath
Two rhythms at once. Bestie plans around both.

Five signals in.
One session out.

You don’t read the chart. Bestie does, and hands you the workout.

CYCLE PHASE All four, tracked
DOSE DAY And days since
ENERGY CHECK-IN Ten seconds
RECENT LIFTS What you actually did
SLEEP & RECOVERY From your ring or watch

A week, planned around you

Shot on Sunday. Follicular phase.

S
Dose
M
Walk
T
Upper
W
Heavy
T
Mobility
F
Lower
S
Rest
Open beta

Get in now, and help decide what ships.

Three minutes to set up. Add your cycle and, if you use one, your dose schedule — then open it and train. It re-plans as you log, and what testers tell us changes what we build next.

Free while in beta
NO CARD · LEAVE ANY TIME
Cycle-synced plans, all four phases
Optional dose tracking, and sessions that follow it
Protein targets that move with your dose
A direct line to the two people building it

ONE EMAIL WITH THE INVITE. NOTHING ELSE, EVER.

From the beta

4.9 · 75+ TESTERS
PLACEHOLDER COPY — REAL BETA QUOTES DROP INTO THESE SLOTS
“I stopped skipping the day after my shot. It just gives me something easier instead of nothing.”
Maya R. · beta tester, June
“Third cycle in and it finally clicked — the heavy weeks land when I actually have the energy for them.”
Danielle K. · beta tester, July
“I was running the same program every week and wondering why some weeks felt impossible. Turns out it wasn’t me.”
Nour A. · beta tester, July
“The protein target moving with my dose is the bit I didn’t know I needed.”
Bex T. · beta tester, August
“It reads my ring and just plans. I don’t have to think about it on a bad day.”
Carly W. · beta tester, June
“I stopped skipping the day after my shot. It just gives me something easier instead of nothing.”
Maya R. · beta tester, June
“Third cycle in and it finally clicked — the heavy weeks land when I actually have the energy for them.”
Danielle K. · beta tester, July
“I was running the same program every week and wondering why some weeks felt impossible. Turns out it wasn’t me.”
Nour A. · beta tester, July
“The protein target moving with my dose is the bit I didn’t know I needed.”
Bex T. · beta tester, August
“It reads my ring and just plans. I don’t have to think about it on a bad day.”
Carly W. · beta tester, June
“Joined for the cycle tracking, stayed for what it does around the shot.”
Steph M. · beta tester, August
“First app that hasn’t made me feel like I’m failing on the low weeks.”
Alina D. · beta tester, September
“I like that it tells me why it moved something. Not just ‘do this’.”
Jenna B. · beta tester, July
“Two months in and I’m lifting heavier than when I started, which I did not expect.”
Rosa V. · beta tester, August
“Setup took about three minutes and it hasn’t asked me to log anything I wasn’t already logging.”
Kirsten H. · beta tester, September
“Joined for the cycle tracking, stayed for what it does around the shot.”
Steph M. · beta tester, August
“First app that hasn’t made me feel like I’m failing on the low weeks.”
Alina D. · beta tester, September
“I like that it tells me why it moved something. Not just ‘do this’.”
Jenna B. · beta tester, July
“Two months in and I’m lifting heavier than when I started, which I did not expect.”
Rosa V. · beta tester, August
“Setup took about three minutes and it hasn’t asked me to log anything I wasn’t already logging.”
Kirsten H. · beta tester, September

Programs inside Bestie

All included. Switch whenever your body asks you to.

A hand gripping a dumbbell, a smartwatch on the wrist High-energy weeks

Strength

Progressive lifting, built to hold on to lean mass while the weight comes off.
Someone resting on a mat with their legs up a wall The day after a dose

Low-energy days

Shorter and lighter, for the days a full session is not happening.
Hands reaching to bare feet in morning light Any day you ask

Mobility

Twenty minutes of range and control. No equipment, barely any floor space.

Questions worth asking

The ones people actually email us. If yours is not here, ask — you get the two of us, not a helpdesk.

Do I need to be on a GLP‑1?
No. Bestie was built for cycle-synced training first. Dose tracking is there when you need it and hidden when you don’t.
Do you promise I’ll lose weight?
No, and we won’t. Bestie is a training app — it plans your sessions around your cycle and your dose. What happens to your weight is between you and your prescriber. Anyone promising you a number is guessing.
My cycle is irregular. Does this still work?
Yes. Bestie plans from what you log rather than from a textbook 28 days.
Who can see my dose log?
Nobody but you. Your dose log is health data and we treat it that way: it is never sold, never passed to ad networks or data brokers, and never shared with an employer or insurer. You can export it or delete it whenever you like.
Is this medical advice?
No. Bestie is a fitness app. It does not prescribe, adjust or advise on medication. Talk to your prescriber about your dose.
What does “beta” actually mean here?
The app works and people are training on it every day. Some things are unfinished and some will change. It is free while that is true, and we tell you before anything about that changes.
Join the beta