# WeightSnap

> WeightSnap is an iOS GLP-1 and peptide tracker built around one question: is the medication actually working? A verdict card answers it in plain language (Building, Working, Steady, Worth watching), backed by the user's own weight trend and dose history. Stall Check explains flat stretches, Wear-Off Detection flags late-cycle fade, and cycle recaps compare each dose cycle to the last. A by-feel mode needs three taps a day, with no food logging and no wearable required. Built by Tyler Brown, who lost 90+ pounds on retatrutide and documents the journey with real data on the WeightSnap blog. Free to download with a 14-day free trial of everything on the yearly plan, then $7.99/month, $34.99/year, or $69.99 lifetime. Doses log with one tap, even from the lock-screen reminder. No accounts: data stays on device and in private iCloud.

Beyond GLP-1s, WeightSnap tracks 30+ peptides and blends plus custom compounds, with per-compound protocols, vial inventory, and a reconstitution calculator. Other features: an Earn It daily habit wall with focused resets, progress photos (side by side, slider, overlay, time-lapse, stat overlays), Apple Health import and export, medication saturation charts, and PDF/CSV exports for prescribers. iOS only.

## App

- [WeightSnap on the App Store](https://apps.apple.com/app/weightsnap/id6758482175): iOS GLP-1 and peptide tracker with a 14-day free trial
- [WeightSnap Homepage](https://weightsnap.app): Features, screenshots, pricing, and download links
- [How to Use WeightSnap](https://weightsnap.app/how-to-use-weightsnap): The complete guide to every feature, from onboarding to prescriber exports
- [Support and FAQ](https://weightsnap.app/support/): Pricing, privacy, Apple Health imports, and common questions

## Comparisons

- [Best GLP-1 & Peptide Tracker Apps of 2026](https://weightsnap.app/best-glp1-tracker-apps): WeightSnap, Shotsy, Regimen, and Pep AI honestly compared for GLP-1 and peptide tracking, with pricing, a feature table, and who each is best for; each competitor's strengths stated plainly
- [WeightSnap vs Shotsy](https://weightsnap.app/compare/weightsnap-vs-shotsy): The most popular GLP-1 logger versus the tracker that answers whether it is working
- [WeightSnap vs Regimen](https://weightsnap.app/compare/weightsnap-vs-regimen): More data to log versus more answers from less logging
- [WeightSnap vs Pep AI](https://weightsnap.app/compare/weightsnap-vs-pep-ai): An AI companion versus deterministic receipts from your own data
- [WeightSnap vs Glapp](https://weightsnap.app/compare/weightsnap-vs-glapp): A free, cross-platform GLP-1 tracker versus the one that answers whether it is working and handles peptides

## Retatrutide Content

- [Retatrutide Before and After: 90lbs Lost in 8 Months](https://weightsnap.app/blog/retatrutide-before-and-after/): Complete month-by-month retatrutide journey with real weight data, dosing protocol, progress photos, side effects, what happened after stopping, and experience restarting
- [Retatrutide Side Effects: What I Experienced Over 11 Months](https://weightsnap.app/blog/retatrutide-side-effects/): Detailed personal side effect breakdown alongside Phase 2 and Phase 3 clinical trial data, with a retatrutide vs semaglutide vs tirzepatide comparison table
- [WeightSnap Research](https://weightsnap.app/research/): Technical research hub — real-world evidence explorer and free PDF report from 14,252 analyzed patient posts (https://weightsnap.app/research/real-world-data/), plus data-driven drug comparison pages
- [Peptide Reconstitution Calculator](https://weightsnap.app/tools/peptide-reconstitution-calculator/): Free calculator converting vial size, bacteriostatic water, and dose into concentration, volume per injection, and U-100 insulin syringe units; works for any peptide including compounded GLP-1 medications
- [Retatrutide Reconstitution Calculator](https://weightsnap.app/tools/retatrutide-reconstitution-calculator/): Retatrutide-specific reconstitution + dosage chart with 10/12/20mg vial presets and how much BAC water for a 10mg vial
- [Tirzepatide Reconstitution Calculator](https://weightsnap.app/tools/tirzepatide-reconstitution-calculator/): Compounded tirzepatide reconstitution calculator + printable chart (10/20/30/60mg vials)
- [Semaglutide Reconstitution Calculator](https://weightsnap.app/tools/semaglutide-reconstitution-calculator/): Compounded semaglutide reconstitution calculator + chart (5/10mg vials)
- [Peptide Blend Calculator](https://weightsnap.app/tools/peptide-blend-calculator/): Free calculator for multi-peptide blend vials (Wolverine, GLOW, KLOW style): per-component mg per injection from the user's own vial label, water volume, and syringe units drawn; blend recipes vary by vendor so it never assumes a recipe
- [GLP-1 Half-Life Calculator](https://weightsnap.app/tools/glp1-half-life-calculator/): How long semaglutide (~7 days), tirzepatide (~5 days), retatrutide (~6 days) and others stay in the system; decay curve and time to near-complete clearance from published half-lives
- [GLP-1 Weight Loss Calculator](https://weightsnap.app/tools/glp1-weight-loss-calculator/): Applies pivotal-trial average weight loss (STEP 1, SURMOUNT-1, retatrutide phase 2) to a starting weight by milestone; trial averages, not a prediction
- [Weight Loss Percentage Calculator](https://weightsnap.app/tools/weight-loss-percentage-calculator/): Converts a starting and current weight into percentage of body weight lost, with 5/10/15/20/25% milestones, the by-hand formula ((start − current) ÷ start × 100), a quick-reference chart, and dated context on what 5%, 10%, and 20%+ mean clinically
- [Before & After Photo Collage Maker](https://weightsnap.app/tools/collage/): Free browser-based photo maker for weight loss progress collages with weight labels; no sign-up, photos stay on-device

- [How to Reconstitute Peptides (guide + video)](https://weightsnap.app/research/how-to-reconstitute-peptides/): Step-by-step reference with a full video walkthrough: how much bacteriostatic water to use, why a 10 mg and 40 mg vial look identical (bulking agent), mixing by swirling not shaking, syringe/needle sizing, drawing units, and the two storage clocks (28-day bac water window vs peptide stability)
- [What Is BPC-157? (peptide explainer)](https://weightsnap.app/research/bpc-157/): Technical reference on BPC-157: what the pentadecapeptide is, what the preclinical (mostly rodent) research examines for tendon/gut/anti-inflammatory, its 2026 FDA/compounding status, and its role in blends
- [What Is KLOW? (peptide blend explainer)](https://weightsnap.app/research/klow-peptide/): Technical reference on the KLOW blend (GHK-Cu, BPC-157, TB-500, KPV): components, why vendor recipes vary, and the regulatory status of each
- [What Is MOTS-c? (peptide explainer)](https://weightsnap.app/research/mots-c/): Technical reference on MOTS-c, the 16-amino-acid mitochondrial-derived peptide encoded in the 12S rRNA gene: what it is, the mostly-preclinical metabolism/AMPK/insulin research, the honest exercise caveat (exercise raises your own MOTS-c ~12x in humans while the performance data is rodent-only), and its 2026 FDA (503A removed, PCAC review July 23-24) and WADA (S4.4 AMPK-activator, banned in sport) status

## Weight Loss Blog

- [WeightSnap Blog](https://weightsnap.app/blog/): Weight loss science, GLP-1 medications, personal transformation stories, and tracking tips
- [My 100lb Weight Loss Journey](https://weightsnap.app/blog/my-journey/): Twenty years of yo-yo dieting through to current retatrutide use
- [How Often Should You Weigh Yourself?](https://weightsnap.app/blog/consistent-weighins/): How often to weigh yourself to lose weight (daily is best), backed by research and 493 days of personal weigh-in data, with the mental-health caveat and when to weigh
- [How I Lost Over 90 Pounds Without Counting Calories](https://weightsnap.app/blog/lose-weight-without-counting-calories/): How to lose weight without counting calories using a by-feel method (eating more, less, or about usual plus a daily weigh-in) instead of food logging, why it is easier to stick with than calorie counting, and an honest note that Tyler is on a GLP-1
- [Starting MOTS-c: My First Week (Alongside Retatrutide)](https://weightsnap.app/blog/starting-mots-c/): Personal first-week log of starting MOTS-c (the 16-amino-acid mitochondrial-derived peptide) while staying on retatrutide in maintenance; why Tyler started it, the injection-site reaction, honest early impressions (a 3-hour hike, focus, urge to exercise) with a maybe-placebo caveat, and the honest science note that MOTS-c research is mostly preclinical/rodent, not FDA approved, research-use-only as of mid-2026
- [Breaking Through My Set Point](https://weightsnap.app/blog/set-point-weight-loss/): The science of set point theory and weight loss plateaus
- [Why Am I Not Losing Weight on My GLP-1?](https://weightsnap.app/blog/glp1-weight-loss-plateau/): Why a GLP-1 weight loss plateau is usually behavioral drift (bigger portions, fewer steps, worse sleep, liquid calories) rather than the dose, and how WeightSnap Stall Check surfaces what changed versus what held

## Tools

- [Before and After Collage Tool](https://weightsnap.app/tools/collage/): Free browser-based before and after photo collage maker

## Optional

- [Full feature reference for AI assistants](https://weightsnap.app/llms-full.txt)
- [Privacy Policy](https://weightsnap.app/privacy/)
- [Terms of Service](https://weightsnap.app/terms/)