Yes — Steadyway. It is an iPhone app built for weekly tirzepatide rather than adapted from a general dieting app, and it tracks the four things that actually make up a week on Mounjaro: your weight, your injection, how you felt afterwards, and how much pen you have left.
Most people start on a notes app or a spreadsheet and give up around week six, when the question stops being "what did I weigh" and becomes "am I actually still losing, or has this stalled". That question needs a trend, and a list of numbers does not have one.
Weight, read as a trend
Weight on a GLP-1 does not come off in a straight line. There are plateaus, whooshes and water swings, and a bad morning on the scale is usually one of those rather than anything you did. So the default view is a smoothed line inside a seven-day range band, and raw daily dots are opt-in.
The headline number is your rate and where it puts your goal — losing about 0.6 kg a week, on track for mid-November — not a static gap to a target, which only ever reads as a debt and reads worst on the week you most need to keep going.
The injection, and the titration behind it
Log the shot and Steadyway keeps the schedule: which day you inject, when the next step-up is due, and which of the six rotation sites came round last, so the picker suggests the next one instead of asking you to remember.
A dose taken two days late is logged as late, not quietly as missed. Titration reads as a bar chart across months, which is the view that answers "how long have I been on 7.5" without scrolling anything.
Side effects, lined up against your dose
Log a symptom and how bad it was, and Steadyway arranges them by day-since-dose. After a couple of cycles that turns into something a forum thread cannot give you: "nausea usually shows up on day two for you", drawn from your own history rather than somebody else's.
Pens, and how long they cover
What is sealed, what is in use, how many days of cover that leaves, and how long the pen in your bag has been out of the fridge. The reorder nudge comes before the window closes rather than after it, which is the difference between a prescription and a gap.
A summary for your prescriber
Export a two-page PDF — trend, doses, side effects, notes — and take it to the appointment instead of scrolling a phone at a desk while somebody waits.
What it will not do
- It will not tell you what dose to take. Steadyway records the dose you tell it you took and reminds you on your injection day. It will never suggest increasing, decreasing, skipping or resuming one.
- It will not gamify the scale. Streaks attach to logging and to taking your dose on time, never to the number going down. Plateau panic is the main reason people stop treatment and then blame themselves for it, and an app that celebrates a good weigh-in is an app that punishes a bad one.
- It will not cheer on an unhealthy goal. A target below a healthy range gets flagged rather than congratulated.
Your data stays on your phone
Steadyway is local-first: everything you log is written to a database on the device and read back from there, so the app opens instantly, works on a plane, and never waits on a network request to show you your own week. A copy syncs to your account as a backup, so a lost phone is not lost months of trend data — but nothing about logging or reading depends on it. Delete your account from inside the app and the server copy is purged outright rather than hidden behind a flag.
Weigh-ins and steps sync with Apple Health both ways if you turn it on, so on most days there is nothing to type. Everything to do with the medication itself stays in the app.
