Muscle-protection infrastructure for the weight-loss era

The world's first muscle-protection platform.

Lose fat and you burn muscle too. We're the platform that stops it — a consumer app and data lab, and the LeanShield™ API behind the clinics.

Download on theApp Store See the science →

4.7 App Store rating · 700,000+ users

Today

87 LeanShield™ Score

✓ Muscle protected

Calories1,640 / 1,800

Protein132g / 140g

Training84 / 100

🎙️ "I had salmon, rice and broccoli"

700,000+users

50,000+paying members

4.7★App Store rating

CambridgeClinical RCT pending

The GLP-1 paradox

The drug turns off hunger.
Something has to protect your muscle.

GLP-1 medications make it effortless to eat less — but eat too little, without enough protein and training, and your body burns muscle alongside fat. That's how people end up lighter, but weaker and metabolically worse off.

40%

Up to 40% of the weight lost on GLP-1 medications can be lean muscle — not fat.

It's not just GLP-1

Yo-yo dieting does the same damage.

Lose weight, regain it, go more extreme, regain it again. Every cycle you lose fat and muscle — but you mostly regain the fat, not the muscle. Over time you can weigh the same yet carry more fat and less muscle than when you started. Clinicians call it sarcopenic obesity — the "skinny-fat" trap.

80%

of people who lose weight regain it within 5 years — because they lost muscle along with the fat.

2.5×

higher disability risk for those who slide into sarcopenic obesity.

1.5kg

of muscle lost every diet — roughly what a decade of getting older does.

On a GLP-1 or not, the rule is the same: protect your muscle while you lose fat. It's the strongest predictor that the weight stays off — and that you stay strong, not frail, as you age. Muscle is the currency of health.

Why it works

This is The LeanShield™ Loop.

Knowing what to do was never the hard part — doing it, every day, is. So we built a loop that does the thinking and hands you one move at a time. Run it daily and protecting your muscle stops being a project. It becomes a habit.

Capture

You talk.

Tell ParrotPal what you ate and did — by voice, photo or text. No forms. Five seconds.

Score

It scores your muscle.

LeanShield™ turns it into a live 1–100 score — exactly how well you're protecting muscle right now.

Nudge

Your next move.

Not a data dump. One move: more protein, an 11-minute workout, ease the deficit. The 20% that matters.

Act

You do it.

You make the one move. The loop comes round again — and your score climbs.

↻ …and repeat

Every loop, your LeanShield Score climbs — out of the danger zone, into protected. That's muscle preserved, fat lost, and a result that finally sticks.

ParrotPal makes it effortless. LeanShield™ makes it safe. The Loop makes it stick.

The same Loop runs in your pocket — and behind your clinic's API.

See the science behind the Score ↓

The engine inside

Meet LeanShield™ — your metabolic safety net

ParrotPal doesn't just show you a calorie goal. It shows you your LeanShield Score — a proprietary 1–100 measure of how well you're protecting your muscle in real time. High score, you're preserving muscle while fat burns. Low score, you're in the catabolic danger zone. It's the clinical buffer between looking frail and looking fit.

™ Trademarked
⚙︎ Patent pending
🔬 Clinical trial · University of Cambridge

Protein, defended

LeanShield watches your protein against the threshold your muscle actually needs — and nudges you before you fall short.

Deficit, controlled

It catches deficits that are too aggressive — the ones that quietly strip lean mass — and tells you to eat.

Training, scored

Resistance training is the strongest muscle-protection signal there is. LeanShield rewards it and shows the payoff.

Why "ParrotPal"?

The name is the strategy.

Knowing what to do was never the problem — doing it is. So we made it simple enough to actually stick to. The name says it in three parts:

80/20

Pareto

Most apps bury you in data. We obsess over the 20% that drives 80% of your results — calories, protein, and the training that protects your muscle. Track those, ignore the noise.

🦜

Parrot

Parrots talk — so you just talk. Tell it what you ate like you'd text a mate, by voice, photo or a quick message, and it handles the maths, the targets and the coaching.

🤝

Pal

And a pal in your corner — the friendly coach and community that turns up every day and keeps you going.

How it works

Track three things. That's it.

Calories. Protein. Training. The golden trio.

🎯

Custom targets

Tailored to your metrics for safe weight loss & management. No quick fixes, no crash deficits.

💬

Log food with AI

Text it, voice-note it, snap a photo, scan a barcode. Logging is effortless — do it your way, in seconds.

🎙️ Voice📷 Photo⌨️ Text📦 Barcode

📈

Weekly coaching

An AI review algorithm steers you to results with automatic tweaks to your targets — every single week.

Train smarter

Workouts built around you — and your score.

Resistance training is the single biggest lever for protecting muscle. So ParrotPal hands you workouts tailored to you — at home or in the gym, around your equipment, your experience, and any injuries or limitations. Each session tells you exactly what to do, and exactly how much it'll raise your LeanShield Score.

🏠 Home🏋️ Gym🩹 Injury-aware⚙️ Any equipment

You're not doing this alone

Thousands of people, in it together — every day.

Behind the app is a community of thousands who show up daily — sharing wins, asking questions and keeping each other going. You get daily support, live expert talks, and coaching that actually replies. It's the difference between starting and sticking.

💬 Daily community chat 🎓 Live expert talks 🎧 The ParrotPal podcast 🤝 Coaching that replies

Loved by people, all over the world

4.7★ and counting

Real reviews from real members on the App Store.

★★★★★

An absolutely brilliant idea that I can't believe the market leaders haven't thought of already. The app makes a very mundane task take quite literally seconds — it's made calorie tracking enjoyable again.

Game changer! 5 Stars!Mikey673 · App Store

★★★★★

Finally solving the frustration of food-tracking apps with huge databases and endless scrolling. Being able to go out with friends and just voice-note what you ate, logged immediately — a game changer!

Revolutionary!Bellabella1747 · App Store

★★★★★

The best tracker ever, it's so easy to log that why wouldn't you. I've had it for 3 months and never failed to track. Best of all I'm getting results in a sustainable way.

The only calorie tracker you needSteppers · App Store

★★★★★

This is the app and the approach I needed for years. Gone are the judgemental comments about foods being bad or wrong. The ease with which you can track food is brilliant — type it like a message, voice-note it.

Amazing.3jce · App Store

★★★★★

ParrotPal has given me a sense of purpose — of being a scientist of my own body. I thought it would be just another weight-loss app… but it's so much more than that.

A sense of purpose 💪Sennen Prisk · Cornwall, UK

★★★★★

This has completely changed my approach to weight loss and a healthy lifestyle. Try it and I guarantee you'll never look back!

Just completed week 3 and love itKstie2782 · App Store

Vetted. Selected. Awarded.

Due-diligenced by some of the most demanding names in UK tech and healthcare.

🏆 Winner AI for Healthcare Resilience Award

🏆 Winner Women in AI

🏆 Winner NextWave

Top 20 Deep-tech Competition

Top 20 Future of Technology

UK Business
Tech Awards Finalist Healthtech Company of the Year

Selected Emerging Giants Programme

The science

Built with the University of Cambridge

LeanShield's science was developed with Professor Nick Wareham and his team at the University of Cambridge — and a clinical RCT, measured by DEXA scan, is pending to prove that LeanShield-guided members retain significantly more lean mass.

Prof Wareham is Director of the MRC Epidemiology Unit at the University of Cambridge and Co-Director of the Institute of Metabolic Science — among the world's foremost researchers into the prevention of obesity and type 2 diabetes.

We'd rather prove it than claim it. That's what the RCT is for.

For partners · B2B

Not just an app — a platform.

Behind the app sits ParrotPal Group: three consumer brands — ParrotPal, Turtle Method (our women's-health brand) and GLP Pal (our GLP-1 clinical companion) — all feeding LeanShield™, the patent-pending muscle-safety engine partners license by API: the 1–100 score, the coaching logic, and the behavioural data behind it.

🏥 Clinics & GLP-1 providers 💊 Pharmacies 🏋️ Gyms 🛡️ Insurers 🔌 API & licensing

Explore the partner platform →

The team