Meet HoldStrong — Track strength and waist on GLP-1, offline

Health And Fitness

HoldStrong

Track strength and waist on GLP-1, offline

What HoldStrong does

Losing weight on Ozempic, Wegovy, Zepbound, or Mounjaro? The scale is lying to you about half the story. Studies of semaglutide and tirzepatide show that up to a quarter to a third of GLP-1 weight loss can come from lean mass, the muscle that keeps you strong, steady, and metabolically healthy. HoldStrong is the simple home tracker that screens for that hidden loss, so you can keep the muscle and lose the fat.

Unlike a gym PR app, HoldStrong is not about lifting heavier. It is a functional-strength battery you can run on your living-room floor in about five minutes, no equipment required. Each test is a clinically grounded measure of the strength and mobility that GLP-1 medications can quietly erode: a 30-second sit-to-stand count for lower-body power, a timed single-leg stand for balance and fall risk, a guided grip self-check, and a tape measurement for waist circumference. The phone counts your reps and times your holds with clear audio cues, so you can stay focused on the movement instead of watching a stopwatch. Run the battery every couple of weeks and HoldStrong plots each result against your personal baseline.

The app does the interpreting for you. Raw test numbers are meaningless without context, so HoldStrong never asks you to remember what 'good' looks like. When a test dips below your own starting point, it flags the drop in plain language and nudges you toward the two things the research says actually preserve lean mass during a calorie deficit: enough daily protein and regular resistance work. You set a protein target, log your tape measurements, and watch your waist shrink while your strength holds, which is the real definition of a successful cut. Hold a single-leg stance longer than last month and stand up more times in thirty seconds, and you know the weight you are losing is fat, not the muscle you worked to build.

HoldStrong is built for the millions of people now on GLP-1 therapy who want to do it right. It is offline-first and private by design. There is no sign-up, no email, no cloud sync, and nothing to cancel. Your medication and your body are nobody else's business, so every measurement stays on your device. Start completely free with the full test battery and trend charts; a one-time Pro unlock, never a subscription, adds protein goal tracking, a progress-photo timeline, and CSV export you can hand straight to your doctor or dietitian at your next visit.

Whether you are three weeks or three years into your medication, HoldStrong helps you answer the question the scale cannot: am I getting healthier, or just lighter? Track what matters, hold what you have built.

• Five-minute home strength battery: 30-second sit-to-stand, single-leg balance, grip self-check, and waist tape • Personal-baseline trend charts for every test, with early-decline flags • Plain-language guidance toward protein and resistance work when a score dips • Protein target and daily intake tracking (Pro) • Waist and progress-photo timeline so you can see fat loss without muscle loss • CSV export of your full history to share with your doctor (Pro) • 100% offline, no account, no subscription, your data never leaves your phone

A look inside

Tap any screenshot to open the full-resolution version.

What's inside

• Home strength battery — Guided five-minute run of four equipment-free tests: a 30-second sit-to-stand counter, a timed single-leg balance hold, a grip self-check, and a waist tape entry. The phone times and counts each test with audio cues.
• Baseline trend tracking — Every result is plotted against the user's first session, so progress and regression are obvious. Each chart shows the personal baseline line and current trajectory.
• Decline detection and coaching — When any test drops below baseline, HoldStrong flags it and surfaces plain-language guidance toward protein intake and resistance training, the two evidence-backed levers for lean-mass retention.
• Waist and protein companion — Log waist circumference and daily protein against a target, with a progress-photo timeline, so fat loss without muscle loss is visible at a glance. CSV export hands the full record to a clinician.

Why we built it

GLP-1 weight loss includes substantial lean-mass loss, but users only watch the scale and have no easy, private way to detect strength or functional decline until it becomes a fall, fatigue, or rebound-weight problem.

What makes it different

Most GLP-1 apps are dose reminders or weight loggers; HoldStrong is the only one built around a functional-strength screening battery. It is distinct from our own Ironlog, which tracks gym PRs going UP for lifters; HoldStrong instead screens for decline using validated home tests (sit-to-stand, single-leg balance, gri…

Who it's for

Anyone who wants honest tracking without a coach, a subscription, or a streak guilting them at 11pm.

In one line: Track strength and waist on GLP-1, offline

Try it

See the Track strength and waist on GLP-1, offline for the full feature list, the info table, and support links.

Use HoldStrong, found a bug, or have a feature request? Comments are open below — anonymous is fine.