SynergyA Peptide Tracker alternative that checks your whole stack
Synergy is a Peptide Tracker alternative that logs peptides, GLP-1 medications, and supplements in one place and checks them against each other. Below: what Peptide Tracker states it does, what Synergy adds, and what Peptide Tracker has that Synergy does not. Every fact is from the app's own App Store listing, verified on the date shown.
We make Synergy. "Not stated" means the Peptide Tracker listing does not mention the feature, not that the app cannot do it. Corrections: support@pepsupsynergy.com.
What Peptide Tracker does, in its own words
Peptide Tracker (Flat Six Labs) describes a free, paywall-free app for peptide protocols: multi-compound stacks with schedules, dose logging with injection sites, vial and supply inventory, reconstitution, syringe-unit, blend and half-life calculators, estimated plasma levels, weight tracking, progress photos with alignment tools, a consistency "night sky" you can share, educational content, a Peptide Assistant for general information, and a question-and-answer community with open threads and community notes. Compounds named include semaglutide, tirzepatide, retatrutide, BPC-157, TB-500, GHK-Cu, CJC-1295, ipamorelin, NAD+, TRT and HRT. "100% free. No subscription. No paywall." with optional founding-member purchases and tips.
What Synergy adds
Made for use, not for show
Log it. See where it went. See what it touches.
Supplements, peptides, and GLP-1s in one cabinet
Everything you take is logged in one place — the weekly shot, the peptides, and the supplements — instead of the shot in one app and the rest in a notes file.
Interaction checks across the whole stack
Synergy checks every item against every other and shows the pairs with documented interactions — synergies to lean into, cautions to watch — each with a plain-language, educational summary. Never a dose.
Scan a label to add it
Point the camera at a supplement label and the item is added, free on every plan.
Side effects, narrowed down
Reacting to something while taking four things? The side-effect analyzer works through the timeline and produces a record you can hand to a clinician.
What Peptide Tracker has that Synergy does not
A fully free model with no subscription, an estimated plasma-level curve and half-life calculator, progress photos, iPad/Mac/Vision builds and an Android version. Synergy has a free tier with a Pro subscription for unlimited cabinet items, cycles and per-day dosing, the AI coach, cloud backup, and trends; it does not draw plasma curves; and it is iPhone-only today.
Side by side
| What the app does | Synergy | Peptide Tracker |
|---|---|---|
| Logs peptides (BPC-157, TB-500, GHK-Cu, CJC-1295…) | Yes | Yes |
| Logs GLP-1 medications | Yes | Yes |
| Logs supplements as a category | Yes | Not stated (custom compounds only) |
| Checks interactions between every item in the stack | Yes | Not stated |
| Scans a supplement label to add it | Yes, free | Not stated |
| Reconstitution and syringe-unit math on numbers you enter | Yes | Yes |
| Vial inventory (mixed and unmixed, remaining volume) | Yes | Yes |
| Estimated plasma-level curve and half-life calculator | No | Yes |
| Side-effect log with a narrow-down-the-cause flow | Yes | Not stated |
| Community | Structured reviews and discussion | Q&A community: structured answers, open threads, usernames, community notes |
| AI assistant | Coach (Synergy Pro) | Peptide Assistant (general peptide information) |
| Progress photos with alignment tools | No | Yes |
| Apple Health connection | Yes | Not stated (weight log built in) |
| Price model | Free tier; Synergy Pro subscription | Fully free; optional founding-member purchase and tips |
| Platform | iPhone | iPhone, iPad, Mac (Apple silicon), Apple Vision; Android per peptidetracker.ai |
Verified 2026-09-24 against the US App Store listing for Peptide Tracker (Flat Six Labs LLC, v2.21.0) and Peptide GLP Supplement Synergy (PSSYN LLC, v1.0.2). Android availability per peptidetracker.ai. See the full comparison.
More head-to-head pages
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