WeightSnapWeightSnap vs Glapp: Which GLP-1 Tracker Is Right for You?
Last updated: July 2026
Glapp is one of the better GLP-1 trackers out there: free to start, on iOS, Android, and the web, with medication level curves, an Apple Watch app, comparisons against clinical trial data, and a built-in AI called Wisdom. It is a genuinely good pick, and this page says so plainly. WeightSnap logs the same daily things Glapp does, then goes a step further in two directions Glapp does not: it reads your data back as a verdict on whether the medication is working, and it treats peptides you reconstitute yourself, like retatrutide, as first-class citizens rather than leaving them out entirely.
Choose Glapp if you want a free, cross-platform GLP-1 tracker, you are on Android or want web and Apple Watch access, or you want a built-in AI assistant. Choose WeightSnap if you want to know whether the medication is actually working (a plain-language verdict, Stall Check, and Wear-Off Detection), if you track peptides and need reconstitution math and a vial library, if you would rather log in three taps a day, or if you want to pay once for lifetime access. Glapp is GLP-1 only; WeightSnap covers GLP-1s and 30+ peptides.
Both track your shots. WeightSnap also reads the result.
Glapp does a lot with your data. It charts weight against dose, models semaglutide and tirzepatide levels, runs a shot phase wheel that predicts where you are in the weekly cycle, and compares your results against clinical trial averages and other users on your medication. That is real insight, and more than most trackers offer.
WeightSnap adds one thing on top: a single answer. The verdict card at the top of the Doses tab reads Building, Working, Steady, or Worth watching, each backed by receipts from your own trend and dose history. When your trend goes genuinely flat for weeks, Stall Check shows what moved during the flat stretch and what held steady. When your check-ins show a repeating late-cycle fade, Wear-Off Detection surfaces the pattern. Glapp gives you excellent context; WeightSnap gives you a call.
The bigger gap: peptides and reconstitution
Glapp is built for GLP-1 pens. It tracks supply and deducts doses, but it has no reconstitution calculator and no research-peptide library, so a compound like retatrutide that arrives as a lyophilized powder is out of scope. WeightSnap was built the other way around: a 30+ peptide and blend library plus custom compounds, each with per-compound schedules, vial inventory, and a reconstitution calculator, backed by a full reconstitution guide. If your tracking is only ever going to be Ozempic or Zepbound, this gap will not matter to you. If it includes anything you mix yourself, it is the whole ballgame.
Feature comparison
| Feature | WeightSnap | Glapp |
|---|---|---|
| Answers "is it working?" (verdict card) | Yes | Trend reports and peer comparison, no single verdict |
| Stall analysis (what changed vs what held) | Yes | No |
| Wear-off pattern detection | Yes (Beta) | No |
| Cycle recaps | Yes | Shot phase wheel with predictions |
| Medication-level chart | Included in every plan | Yes (semaglutide, tirzepatide) |
| Comparison vs clinical trial data | Via research hub | Yes, in app |
| AI assistant | No (deterministic analysis) | Yes (Wisdom) |
| Peptides beyond GLP-1 | 30+ library plus custom, with protocols and vials | GLP-1 only |
| Reconstitution calculator | Yes | No (pen supply only) |
| By-feel mode (no numbers required) | Yes, three taps a day | No |
| Apple Watch app | No | Yes |
| Accounts | None; data on device and private iCloud | Account for cross-device sync |
| Platforms | iOS | iOS, Android, Web |
| Ratings | 5.0 stars (70+ ratings) | 4.7 stars (about 656 ratings) |
| Price | 1 week free trial, then $4.99/wk, $39.99/yr, or $79.99 lifetime | Free tier; Max from $4.99/wk, $9.99/mo, or $39.99/yr |
Why WeightSnap wins
It answers the only question that matters. The verdict, Stall Check, Wear-Off Detection, and cycle recaps interpret your data instead of only charting and comparing it. Glapp's peer and trial comparisons are strong context, but they stop short of a single working-or-not call.
It handles peptides and reconstitution. 30+ peptides and blends, custom compounds, vial inventory, and reconstitution math, including powders like retatrutide. Glapp is GLP-1 only.
Tracking without the homework. By-feel mode is three taps a day, with no food logging and no wearable required, and no account to create.
A lifetime exit. $79.99 once, an option Glapp does not offer, and WeightSnap's $39.99 yearly matches Glapp Max's annual price.
Where Glapp is strong
Free and cross-platform. Glapp runs on iOS, Android, and the web with cross-device sync, and has a usable free tier. WeightSnap is iOS only and paid after a one week trial. If you are on Android or want web access, Glapp wins outright.
An Apple Watch app. Glapp includes one; WeightSnap does not yet.
Built-in AI and peer context. The Wisdom assistant answers GLP-1 questions, and Glapp compares your results against clinical trial data and other users, in the app.
GLP-1-specific guidance. The shot phase wheel, titration guidance, and missed-dose help are polished touches for a GLP-1-only journey.
Which app should you use?
Choose WeightSnap if
You want a verdict on whether the medication is working, not just charts and comparisons. You track peptides or reconstitute your own vials. You hate logging, or you want no account. You would rather pay once for lifetime access.
Choose Glapp if
You are on Android or want web and Apple Watch access. You want a free tier to start. You only track GLP-1 medications and like the shot phase wheel, peer comparisons, and a built-in AI assistant.
Frequently asked questions
Which is better, WeightSnap or Glapp?
Glapp is a free, cross-platform GLP-1 tracker with level curves, an Apple Watch app, trial comparisons, and a Wisdom AI feature. WeightSnap is better if you want your data interpreted into a verdict with Stall Check and Wear-Off Detection, or if you track peptides you reconstitute yourself, which Glapp does not support.
Is Glapp free?
Glapp is free to download with a usable free tier, plus a paid Glapp Max upgrade at $4.99 a week, $9.99 a month, or $39.99 a year. WeightSnap is free to download with a one week trial, then $4.99 a week, $39.99 a year, or $79.99 once for lifetime access.
Does Glapp track peptides or reconstitution?
No. Glapp is built for GLP-1 medications and pen supply, with no reconstitution calculator or research-peptide library. WeightSnap has a 30+ peptide and blend library, custom compounds, vial inventory, and reconstitution math, including retatrutide.
Does WeightSnap work on Android or Apple Watch?
Not yet. WeightSnap is iOS only with no watch app. Glapp runs on iOS, Android, and the web and includes an Apple Watch app, so it is the stronger choice on that front.
Which app tells you if the medication is working?
WeightSnap issues a plain-language verdict plus Stall Check and Wear-Off Detection. Glapp shows progress reports and compares you against trial data and peers, which is useful context but not a single working-or-not call.
This comparison is based on each app's public App Store and Google Play listings and website as of July 2026. Glapp is a trademark of its owner. Spotted something out of date? Tell us and we will fix it.
More comparisons: WeightSnap vs Shotsy · WeightSnap vs Regimen · WeightSnap vs Pep AI · Best GLP-1 & peptide tracker apps in 2026
The verdict, Stall Check, Wear-Off Detection, and the full peptide kit. No account needed.
Download WeightSnapNew here? Read the full guide first.