SynergyA Pep AI alternative that checks your whole stack
Synergy is a Pep AI alternative that logs peptides, GLP-1 medications, and supplements in one place and checks them against each other. Below: what Pep AI states it does, what Synergy adds, and what Pep AI 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 Pep AI listing does not mention the feature, not that the app cannot do it. Corrections: [email protected].
What Pep AI does, in its own words
Peptide AI (Pep AI) describes a peptide and GLP-1 tracker with a reconstitution calculator, injection-site rotation, bloodwork trend tracking, lab and label scanning, wearable metrics (HRV, sleep, body composition) through Apple Health, a friends leaderboard, an AI assistant that answers with your logs and labs as context, and a partnered clinician network for prescription protocols.
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 Pep AI has that Synergy does not
Wearable metrics beyond Apple Health, bloodwork trends on every plan, a friends leaderboard, iPad and Mac versions, and a clinician network. Synergy keeps bloodwork trends in Pro, has no leaderboard, and never connects you to prescribers or sellers.
Side by side
| What the app does | Synergy | Pep AI |
|---|---|---|
| Logs GLP-1 medications | Yes | Yes |
| Logs peptides (BPC-157, TB-500, GHK-Cu…) | Yes | Yes, 50+ compounds |
| Logs supplements as a category | Yes | Not stated |
| Checks interactions between every item in the stack | Yes | Not stated |
| Scans a supplement label to add it | Yes, free | Lab and label scanning (scope not stated) |
| Reconstitution and syringe-unit math on numbers you enter | Yes | Yes |
| Side-effect log with a narrow-down-the-cause flow | Yes | Not stated |
| Community | Structured reviews and discussion | Friends and leaderboard |
| AI assistant | Coach (Synergy Pro) | AI assistant with logs and labs as context |
| Apple Health and wearables | Apple Health | Apple Health and wearables (HRV, sleep) |
| Data export | Yes, always, every plan | Not stated |
| Price | Free tier; Synergy Pro $9.99/mo or $79.99/yr | Free; in-app purchases $6.99–$59.99 |
| Platform | iPhone | iPhone, iPad, Mac |
Verified 2026-09-21 against the US App Store listing for Pep AI (Peptide AI LLC, v2.0.11) and Peptide GLP Supplement Synergy (PSSYN LLC, v1.0.2). See the full comparison.