WeightSnapThe Best GLP-1 Tracker Apps in 2026, Honestly Compared
Last updated: July 2026
Full disclosure before anything else: we make WeightSnap, one of the four apps on this page. So instead of pretending to be neutral, we did the next best thing. Every competitor's strengths are stated plainly, every claim comes from public App Store listings and the apps' own websites, and each app wins the category it actually deserves. If we got something wrong, tell us and we will fix it.
Shotsy is the most popular, with a free logging tier. Regimen has the deepest compound database and bloodwork tracking. Pep AI has the AI companion and meal photo scanning. WeightSnap is the only one that answers whether the medication is actually working, and the only one you can run on three taps a day.
The four apps, one category each
WeightSnap
Every tracker on this page charts your weight and logs your doses. WeightSnap is the only one that reads the result back to you: a verdict card (Building, Working, Steady, or Worth watching) backed by your own numbers, Stall Check that shows what changed versus what held when your trend goes flat, Wear-Off Detection for repeating late-cycle fade, and a recap after every dose cycle. It is also the least demanding: by-feel mode is three one-tap questions a day, no food logging, no wearable, and no account, because signing up for yet another service to track your own body felt like exactly the kind of friction this app exists to remove. Data lives on your device and in your private iCloud. The trade-offs are real: iOS only, no bloodwork, and it is a paid app after the one week trial ($4.99/wk, $39.99/yr, or $79.99 lifetime). It holds 5.0 stars on the App Store, though across 70+ ratings rather than Shotsy's thousands.
Shotsy
The biggest community in the category, with about 25,000 App Store ratings, polished GLP-1 logging, and built-in food, protein, and water tracking. Core logging is free forever. The catches: it is built around GLP-1s (other medications are bare custom entries, with no reconstitution or vial tooling), and the analytical features (estimated medication-level curves, Apple Health sync) sit behind premium from $9.99/mo. On iOS and Android. Full WeightSnap vs Shotsy comparison.
Regimen
The deepest database: 150+ compounds, pharmacokinetic level curves with published methodology, 50+ daily check-in markers, and bloodwork tracking, on iOS, Android, and the web. Free with every feature for your first compound, then $4.99/mo or $39.99/yr. The trade-off is the logging burden: its depth comes from what you feed it, and there is no verdict, stall analysis, or wear-off detection. Full WeightSnap vs Regimen comparison.
Pep AI
An AI companion built into a GLP-1 and peptide tracker: snap a photo of your plate for calorie logging, chat with the assistant, track hydration and inventory. On iOS and Android, with about a 3 day trial, then around $3.99/wk, $9.99/mo, or $39.99/yr. The trade-off: its answers come from a model rather than deterministic analysis of your logs, and there is no stall or wear-off detection. Full WeightSnap vs Pep AI comparison.
Feature comparison
| Feature | WeightSnap | Shotsy | Regimen | Pep AI |
|---|---|---|---|---|
| Answers "is it working?" | Yes (verdict card) | No | No | AI chat |
| Stall analysis | Yes | No | No | No |
| Wear-off detection | Yes (Beta) | No | No | No |
| Cycle recaps | Yes | No | No | No |
| By-feel mode (three taps a day) | Yes | No | No | No |
| Habit layer | Yes (Earn It) | No | No | No |
| Medication-level chart | Included | Premium | Free for 1st compound | Varies |
| Peptides beyond GLP-1 | 30+ plus custom | Custom entries only | 150+ | Yes |
| Bloodwork | No | No | Yes | No |
| Food logging | Imports from Health | Built in | No | AI meal scanning |
| Progress photos | Slider, overlay, time-lapse | Yes | Yes | Yes |
| Accounts | None | None for core use | Yes | Yes |
| Platforms | iOS | iOS, Android | iOS, Android, Web | iOS, Android |
| Free option | 1 week trial | Free logging tier | Free for 1 compound | About 3 day trial |
| Price after | $4.99/wk, $39.99/yr, $79.99 lifetime | From $9.99/mo | $4.99/mo, $39.99/yr | $3.99/wk, $9.99/mo, $39.99/yr |
How to actually choose
Start with the question you most want answered. If it is "did I take my shot and what did I eat," Shotsy or Pep will serve you well, and Shotsy's free tier makes trying it effortless. If it is "what are my levels across a six-compound stack, and what do my labs say," that is Regimen's home turf. If it is "is this medication actually working for me, and what changed when it stopped," that question has exactly one app built around it.
The second filter is honesty about your own logging appetite. Apps that reward heavy logging punish the weeks you stop. WeightSnap's by-feel mode was built for those weeks: three taps a day still produces a verdict, recaps, and a Feel Report, and you can switch to full-detail tracking whenever the mood returns.
The last filter is sign-up tolerance. Regimen and Pep are account based, which is what powers their cross-platform sync and cloud features. Shotsy and WeightSnap work without an account, keeping your medication history on your device and in your private iCloud. If one more sign-up screen is one too many, that narrows the field to two.
Frequently asked questions
What is the best GLP-1 tracker app?
For popularity, Shotsy. For database depth and bloodwork, Regimen. For AI meal logging, Pep. For knowing whether the medication is working, and for the least logging effort, WeightSnap.
Which GLP-1 tracker tells you if the medication is working?
Only WeightSnap issues a verdict: Building, Working, Steady, or Worth watching, computed from your own trend and dose history, plus Stall Check and Wear-Off Detection. The others show charts and leave the reading to you.
Which GLP-1 tracker apps are free?
Shotsy's core logging is free forever; its curves and Health sync are premium. Regimen is fully free for one compound. Pep and WeightSnap are paid with trials: about 3 days and one full week respectively.
Which works without a wearable or food logging?
WeightSnap. Your iPhone supplies steps, weigh-ins take seconds to type or sync from a smart scale, and the daily check-in is three taps.
All claims are based on public App Store listings and each app's website as of July 2026. Shotsy, Regimen, and Pep AI are trademarks of their respective owners. Pricing changes; check each app for current numbers.
Head-to-heads: vs Shotsy · vs Regimen · vs Pep AI · or read the complete WeightSnap guide.
Everything free for a week: the verdict, Stall Check, Wear-Off Detection, and by-feel tracking.
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