GLP-1 & peptide tracker for iPhone

The smartest tracker for people who hate tracking.

And the deepest one for the people who love it.

The only GLP-1 tracker that turns whatever you give it, three taps a day or a full Apple Health pipeline, into actionable answers. No wearable required. Switch styles whenever tracking gets exhausting, because it does.

No wearable needed No food logging required Built by someone who lost 100 lbs on it
Download on the App Store See what it finds
WeightSnap Doses tab: verdict card reading Working, protocol with vial inventory, and the daily check-in chips
Differentiator no. 1 · the verdict

"Is this actually working?"

Every other tracker shows you charts and lets you guess. WeightSnap answers. The Doses tab opens with one word backed by your own numbers: Building, Working, Steady, or Worth watching, each with its receipts underneath.

"Down 4.1 lbs over the last 30 days. Dose held strong 3 of 4 cycles."

It works whether you track everything or almost nothing: full Apple Health data feeds it, and so do three honest taps a day.

WeightSnap verdict card reading Working: down 6.4 lbs over the last 28 days, dose held strong 4 of 4 cycles
WeightSnap founder before and after losing 100 pounds

From 290 lbs to 190 lbs. Then I built the app I wish I had.

WeightSnap isn't a startup's guess at what GLP-1 users need. It's one person's answer to a year of real injections, real stalls, and real spreadsheets that finally got replaced. Read the full journey, monthly photos included.

"A few short weeks of use and this has become one of my most frequently used apps. Thoughtfully designed. Highly recommended!"

DouglasJayK · App Store review

"This weight tracking app has thought of everything! If you are on a GLP-1, it tracks the dosing and titration. You can also add other peptides to it."

VRowan01 · App Store review

"Absolutely great app for tracking Reta dosage and progress."

Ajibek · App Store review
Stall Check card: weight held flat for 3 weeks and 3 other things changed, with movement, eating, Earn It, sleep, time on dose, and wear-off rows Stall Check detection sheet: your trend's been flat for 3 weeks, see what else changed
Differentiator no. 2 · Stall Check

When your weight stalls, it tells you why

Plateaus happen on every GLP-1. The painful part is not knowing why. When a real stall starts, Stall Check finds you and shows what changed during the flat stretch, and what held steady: movement, eating, sleep, dose feel.

Sometimes the answer is "you moved less, and you can see it." Sometimes it's the more valuable one: "nothing you did changed," which points at the dose instead of at you, and gives you something concrete to bring to your prescriber.

Differentiator no. 3 · Wear-Off Detection · Beta

Day-5 hunger: real pattern, or in your head?

It's the most-asked question in every GLP-1 community, and no chart answers it. WeightSnap does it with one daily tap: dose feels strong, fading, or not there. Across cycles, a pattern emerges and gets named, receipts included: what climbed, by how much, in how many cycles.

That's a sentence a prescriber can act on: timing, dose splitting, or reassurance.

Wear-Off Detection card: pattern found, food noise climbs from 2.2 to 5.3 in the last two days before your shot, rose in 11 of 11 cycles across 70 tagged days
Dose cycle summary card: Dose 13 at 6 mg with weight, protein, steps, and food noise tiles, each compared to the last cycle, with the previous cycle's stats beneath
Differentiator no. 4 · cycle patterns

Every dose cycle, compared

Each dose starts a cycle, and WeightSnap scores every one: weight change, activity, eating, mood, side effects. Swipe between cycles and the pattern shows itself: what a dose increase actually changed, which week the wheels came off, what your best cycle had in common with your second best.

This is the analysis people build spreadsheets for. It's automatic here.

Differentiator no. 5 · Earn It

One honest question a day, and a wall to show for it

Results on these medications are mostly about showing up. Earn It asks one question each evening, on a notification if you want it: did you earn it today? Honest yeses become bricks in a wall you can see, with mile markers on the road to your goal weight.

No streak-shaming. A missed day is a gap in the wall, and the wall keeps going.

Earn It goal card: Road to 185 progress meter with mile markers, a wall of earned days with gold locked runs, 58 earned and 9 locked with a 4 day streak You locked it in: 3 days earned clean, they're gold on your wall now
Differentiator no. 6 · photos tied to data

Before and after, linked to the numbers that made it

Progress photos attach to real weigh-ins, so every comparison carries its data: the dates, the weights, the delta. Side-by-side, slider, overlay, and auto-generated time-lapse videos that compress months into seconds.

The scale lies day to day. A photo with its receipts doesn't.

Built for both kinds of people

Tracking gets exhausting. So switch.

Most trackers are built for people who love logging, then lose everyone else by week three. WeightSnap asks how you like to track, and lets you change your answer whenever you want, without losing anything.

By feel

For non-trackers (yes, really)

No food logs, no macros, no wearable. Three taps a day: how you ate, how you moved, how the dose feels. The verdict, the stall detector, and the weekly report all run on it.

By-feel tracking in WeightSnap: check-in chips with a 36 day streak and the weekly feel report built from 23 taps, with an insight about fading days landing late in the cycle
By the numbers

For the power users

Apple Health sync, medication saturation curves, correlation charts, cycle analytics, vial inventory. Spreadsheet depth without maintaining the spreadsheet.

And the full kit, of course

Everything you'd expect is here too

Saturation curvesInteractive medication-level charts from published half-life data, with next-dose projections.
Compound library30+ peptides and blends like KLOW, custom schedules, injection-site rotation.
Reconstitution calculatorVial size, BAC water, exact draw for any dose, including inside blends.
Vial inventorySupply on hand and how long each vial lasts at your current dose.
Prescriber exportClean PDF or CSV of doses, weight, side effects, and check-ins.
Interactive chartsPinch, pan, and scrub everything. Zoom in and weigh-ins become labeled bars.
Common questions

Frequently asked

Do I need an Apple Watch?

No. A watch adds active calories, heart rate, and sleep to your charts, but WeightSnap works fully without one. Your iPhone supplies steps, a smart scale can supply weigh-ins, and by-feel tracking needs nothing but three taps a day.

Do I have to log food or count calories?

No. The by-feel check-in asks how you ate compared to your usual, one tap. If you do log food in another app, WeightSnap can import calories and macros from Apple Health, but it never requires them.

Does it work with compounded tirzepatide or semaglutide?

Yes. You set your own doses and schedule, so compounded medication, microdosing, and non-standard titration all work. Vial tracking and the reconstitution calculator exist for exactly this.

Can I track peptides that aren't GLP-1s?

Yes: 30+ compounds and blends like KLOW in the library, plus custom entries, each with its own schedule and vial inventory.

Do I need an account?

No account, no sign-up. Your data stays on your device and in your private iCloud, and it's never sold.

Can I show my results to my doctor?

Yes, that's a first-class feature: clean PDF and CSV exports of doses, weight, side effects, and check-ins.

More questions? The full guide walks through every screen, and support answers the rest.

Pricing

Every feature, free for a week

Download free and try the whole app for a week: the verdict, Stall Check, Wear-Off Detection, saturation curves, cycle analytics, all of it. No commitment, cancel anytime.

Then $4.99/week, $39.99/year (works out to $0.77 a week), or $79.99 lifetime, one time, forever. Current pricing always shown in the app.

See what's working.

Whether you track with three taps or a full Apple Health pipeline, the answer is the same app.

"A few short weeks of use and this has become one of my most frequently used apps."DouglasJayK · App Store review · 5.0 rating

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