If you run peptides, the annoying part isn't the protocol. It's keeping track of it. Here's a straight comparison of the trackers, including where each one falls short, ours included.
Which compound, what day, which injection site, did the bloodwork actually move, and is any of it doing what you hoped. Most people start in the Notes app or a spreadsheet, hit a wall, and go looking for a real tracker.
The problem: half the "best peptide tracker" lists you'll find are written by the apps themselves. So here's a comparison that names where each tool wins and where it doesn't. Use it to pick the one that fits how you actually track, then get on with it.
| App | Platforms | Free tier | Paid | Best for | Watch-out |
|---|---|---|---|---|---|
| StackSense | Web / PWA (any device) | Yes | $9.99/mo founding | Tracking your whole stack (supps + peptides) with a baseline and bloodwork in one place | Newer, founding early-access; peptide library smaller than Regimen's |
| Regimen | iOS, Android | Yes, 1 compound only | $4.99/mo or $39.99/yr | Polished peptide-only app, biggest compound library (600+) | Free tier can't track a stack; you pay to add a second compound |
| PeptIQ | iOS, Android, web | Yes, fairly generous | $19.99/mo (Pro) | iOS users who want an AI chatbot and a vial scanner | Priciest here; bloodwork sits behind the paywall |
| Smart Peptide Tracker | Android, iOS | Yes | varies | Simple Android-first logging | Reviewers keep asking for export-to-coach and AI insights |
| OptiPin | iOS | Yes | varies | Privacy-minded users who want data on-device | iOS only, narrower feature set |
| PepFlow | iOS | Yes | varies | Dosing + adherence reminders | iOS only, newer entrant |
Regimen is the strongest peptide-only option right now, and it's honest to say so. Polished app, the deepest compound library (600+), and the free tier unlocks every feature for a single compound. The catch is exactly that: the second you run a stack, you're paying $4.99/mo. If you only ever track one thing, it's hard to beat.
PeptIQ comes at tracking from the convenience angle. The vial scanner reads a label and pre-fills the compound, and there's an AI chatbot for quick questions. It's on iOS, Android, and web. Pro is $19.99/mo, the priciest here, and bloodwork overlays live up there. Great if you value speed of setup and you're fine paying for it.
Smart Peptide Tracker is a straightforward Android-first logger that recently added iOS. It does the basics. The recurring request in its reviews is the higher-end stuff (export to a coach, AI insights), so know what you're getting.
OptiPin and PepFlow are newer iOS entrants. OptiPin leans on on-device privacy, PepFlow on dosing and adherence reminders. Worth a look if you're on iOS and one of those is your priority, but both are narrower than the top three.
Quick disclosure: we make StackSense, so weigh this accordingly. We didn't build it to be another peptide-only app, because that lane is crowded and Regimen is good at it. We built it for the person whose tracking problem is bigger than peptides.
If you take supplements and run peptides and want your bloodwork sitting next to all of it, every peptide-only app forces you into two or three tools. StackSense is one place for the whole stack: 420+ compounds across supps and peptides, a bioavailability view, symptom and bloodwork logging so patterns actually surface, and a baseline so "better" means something measured. It runs as a web app, so you add it to your homescreen on any device, no app store gatekeeping.
What we won't pretend: we're newer, we're in founding early-access, and our raw peptide library is smaller than Regimen's 600+. If peptide-only depth is all you need, they're a fair pick. If you want your whole stack in one view, that's the gap we built for.
Want your whole stack in one place? StackSense is in founding early-access.
See StackSense and grab founding accessFor a single compound, Regimen's free tier is the most complete. If you run a stack, check each app's free cap first, because several limit free users to one compound. StackSense and PeptIQ have more usable free tiers for multi-compound tracking.
Yes. Regimen, PeptIQ, and Smart Peptide Tracker have Android apps. StackSense is a web app (PWA), so it runs on Android, iPhone, or desktop without the app store.
Some. PeptIQ puts bloodwork behind Pro. StackSense includes bloodwork and symptom logging so you can line lab markers up against your protocol. None of these are medical tools, and none replace your doctor.
A spreadsheet works until you're tracking timing, rotation, symptoms, and labs at once. That's the point where a purpose-built tracker saves you from yourself.
This is a tracking and organization tool comparison. None of these apps give medical or dosing advice, and neither do we. Always work with a qualified professional on anything you put in your body.