For Mounjaro users · Now on iOS & Android

The companion app for Mounjaro weight loss.

Mounjaro (tirzepatide) is a dual GIP/GLP-1 receptor agonist, and tracking your journey on it should be just as simple as the weekly injection. WeightLytic ties your doses, food, protein and weight together — so every clinic conversation is backed by real data, not memory.

  • Log every Mounjaro dose — with site rotation and reminders
  • Record side effects like nausea or fatigue against each dose
  • See your weight trend as a confidence-range forecast, not daily noise
  • Keep protein on target to help protect muscle during faster loss
  • Track supply, reorder timing and your cost per kg (and lb) lost
Download on the App Store Get it on Google Play

Free to download on iPhone and Android.

WeightLytic GLP-1 companion — injections, supply and cost
Built for Mounjaro

Everything a Mounjaro user actually needs.

One app for your medication, your meals and your trajectory — instead of three apps and a notebook.

Mounjaro dose log

Record every injection with date, time, strength and site. Build a complete medication history you can hand to your doctor.

Reminders & site rotation

Smart injection reminders that fit your weekly schedule, plus a site-rotation map to keep absorption consistent.

Side-effect tracking

Log nausea, fatigue, appetite and mood against each dose, so you and your clinician can spot patterns.

Supply & refill alerts

Know exactly how many days of medication you have left and get a heads-up before you run out.

AI food & protein tracking

Snap a photo to log meals, and keep protein on target to help protect muscle while you lose weight.

Weight forecasting

See a projected trajectory from your own data — shown as a confidence range, never a guaranteed outcome.

Medication + data

Mounjaro works best with clear data.

Mounjaro (tirzepatide) is most effective when paired with consistent food, protein and weight tracking. WeightLytic brings it together so your progress is something you can actually see — and show your prescriber.

See forecasting All GLP-1 features

Doses

Logged with date, time, strength & site

Protein

Daily targets to help protect muscle

Supply

Refill alerts before you run out

Symptoms

Side effects tracked against dose

From the blog

More on Mounjaro.

Mounjaro

Mounjaro Side Effects: An Honest, Practical Guide

What Mounjaro (tirzepatide) side effects really feel like — the common gut effects that ease with each dose step, the serious warnings to watch for, who shouldn't take it, and practical ways to cope.

Read article →
Mounjaro

Mounjaro Week by Week: A Realistic First-16-Week Guide

A realistic week-by-week guide to starting Mounjaro (tirzepatide): the official titration schedule, side effects and what weight loss to expect.

Read article →
Mounjaro

Mounjaro vs Ozempic: How They Really Compare

Mounjaro is tirzepatide, Ozempic is semaglutide, and Wegovy adds to the confusion. Here's how they really compare on mechanism, UK licensing, dosing and the head-to-head trial evidence.

Read article →
Mounjaro FAQ

Common Mounjaro questions.

Can I track my Mounjaro doses in WeightLytic?

Yes. Log each weekly injection with the date, time, dose strength and injection site, building a complete history you can share with your clinician.

Does WeightLytic recommend or change my Mounjaro dose?

No. WeightLytic never suggests or adjusts medication doses — that decision belongs to you and your prescriber. We help you record and visualise what is happening so those conversations are better informed.

Will it forecast my weight loss on Mounjaro?

It projects a trajectory from your own logged weight and intake, shown as a confidence range rather than a guaranteed outcome. Everyone responds to tirzepatide differently.

Can I track protein and side effects too?

Yes. You can log meals with AI food photos, keep protein on target to help protect muscle, and record side effects like nausea or fatigue against each dose.

Is WeightLytic available yet, and what will it cost?

WeightLytic is available now on iPhone and Android, with a free tier plus optional Premium (AI features) and Pro (GLP-1 companion) tiers.

Now on iOS & Android

Get WeightLytic for Mounjaro.

Free to download on iPhone and Android — every dose, food and weigh-in in one place.

Download on the App Store Get it on Google Play

Also for: Ozempic · Wegovy · Zepbound · Retatrutide · all GLP-1 medications

WeightLytic is an independent app and is not affiliated with, endorsed by, or sponsored by Eli Lilly. Mounjaro is a registered trademark of Eli Lilly and Company. WeightLytic does not provide medical advice — always follow your prescriber.