Log your shots, weight and side effects in one place. Then Tirzing does the maths most trackers skip: the day your supply really runs out, whether this flat week is a stall, how much medication is actually in you today, and the date you are on course to hit your goal.
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Anything can store a weight. These are the questions people are actually asking, and the ones Tirzing was built to answer properly.
Most calculators divide what is left by the dose you are on today. That answer is wrong the moment your titration schedule steps you up, and it is wrong in the direction that leaves you rationing.
In the chart alongside, the flat-dose guess is 32 days optimistic. That is the difference between reordering calmly and splitting doses to stretch a vial.
Three flat mornings is not a plateau, it is a Tuesday. Tirzing tests your trend against your own history, filters out the water-weight noise, and only raises a flag when the loss has genuinely stopped.
And when it is not a stall, it says so plainly. Being told you are still on pace is worth as much as being told you are not.
A one-compartment Bateman model runs over the shots you have actually logged to estimate what is in your system right now, where the trough falls, and how a late or early shot reshapes the week ahead.
The curve alongside is drawn by the very same model the app uses. It is an estimate for your own records, not medical advice. Always follow your prescriber and the product label.
We draw the line your weigh-ins are actually making and carry it forward as a widening cone, not as one confident guess. You get the likely date, and the range either side of it that nobody else will admit to.
Food and water against your targets, energy in against energy out, and a training log that progresses your lifts for you. All of it built around the thing that matters most on a GLP-1: keeping the muscle while the fat goes.
Vials, labs, consults and supplies in one ledger, divided by the results you are getting. The number is usually a surprise the first time, and a comfort by month six.
Everything above fills itself in from what you record. There is nothing to configure twice.
Sign up free and run through a short setup wizard: your profile, medication, schedule and first vial.
A shot takes two taps and a daily check-in takes a few more. Already tracking elsewhere? Import your old logs.
Runway, levels, stalls, projections and weekly reports fill themselves in and keep updating as you go.
Most trackers make moving in a chore and moving out impossible. Tirzing takes your old logs in whatever shape they turned up in, and hands the whole lot back as one file the moment you ask for it.
We would much rather you stayed because it is good than because your history is trapped in here. No export fee, no support ticket, no waiting.
Adopt a little creature that grows every time you look after yourself. Log your day, weigh in, take your shot on time, and watch them light up. No pressure, no guilt, and no streak you can ruin: miss a week and they will be right where you left them.
Tap a plan to see precisely what is included. This list is built from the live plans, so it can never drift.
Log every injection, with dose, site, date and linked vial, and no caps on any plan.
Track as many medications and dosing schedules as you need, with editable half-lives.
Record weight, hunger, mood, energy, sleep and side effects as often as you like.
A weight graph with your shots overlaid, plus blood pressure and an anonymous peer band.
Track vials and stock with overfill handling and a titration-aware supply runway.
See where your treatment is heading: estimated medication levels, supply runway and your shot-cycle phase.
A clear weekly summary of your progress, written in plain language.
Know whether a flat week is a real stall or just water, and what to do about it.
Log meals, macros and hydration against daily targets that scale themselves as you lose weight.
Follow guided, pre-programmed workouts with form images and step-by-step instructions, log your own, and track cardio & calories burned.
See exactly what your treatment costs, and what you’re getting for it.
A live ETA to your goal weight from your recent weigh-ins, with a likely-by range.
Hold your results with a target weight band and an early warning if you start to regain.
Private progress photos, with a branded before/after you can share.
Understand your side effects: when they peak in your shot cycle, which are easing, and what tends to set them off.
Snap a photo of your plate, scan a nutrition label, or just describe what you ate. AI works out the calories and macros, and you log it in one tap.
Protect lean muscle while you lose fat, with a daily protein target, a training check, and an early warning if you’re dropping weight too fast.
A clean, printable summary of your treatment to hand your prescriber at your next appointment.
When the scale stalls, get an evidence-based action plan built from your own data, not just a diagnosis.
Stay motivated through plateaus with non-scale victories and habit streaks. Progress the scale can’t show.
Track sleep and see how it ties to your hunger, mood and weight. It’s the lever most trackers miss.
Are you titrating faster or slower than the trial did, are you responding as well as the drug you’ve taken suggests, and how much headroom is left?
Adopt a companion that grows as you care for it, just by tracking your treatment. A gentle daily loop that makes showing up feel good.
A GLP-1 companion chat that actually knows your numbers, grounded in your own tracked data, not generic advice.
Tell the AI your preferences and get a full multi-day meal plan with recipes and a shopping list, built around your macro goals.
No features match that plan yet.
A few more things everyone gets, including on the free one.
A friendly global chat room to celebrate wins and swap tips.
Shot-due, weekly-report and check-in nudges by email and web push.
Light or dark themes, and lb or kg, your way. It remembers.
Bring your old logs in, and export everything anytime. Your data is yours.