Best Peptide Tracker Apps in 2026: 8 Apps Compared (Free & Paid)

Tracking a peptide protocol in a notes app or a spreadsheet works for about two weeks. Then you add a second compound, forget which vial is almost empty, or can't remember if you logged Tuesday's dose or just meant to. That's the gap a peptide tracker app is supposed to close.

Most “best peptide tracker” lists online are thin — a few screenshots, no real testing, no mention of who owns your data once it's sitting in your peptide log. We looked at eight: StackLogR, Regimen, PepTracker, Smart Peptide Tracker, Shotlee, PeptIQ, PeptideKit, and Shotsy. One is ours (StackLogR), so read that section with that in mind — we've held it to the same bar as everyone else, including where it's behind.

All competitor pricing, platform, and privacy facts in this article were re-verified on August 9, 2026 against live App Store and Google Play listings and each app's own site. Store listings change — check current listings before you buy.

Quick answer

If you just want the short version: StackLogR is the pick if you want the simplest possible logger that's free, works on iOS and Android, and never asks for an account or sends your data anywhere — it's the only app here that's fully on-device on both platforms. Regimen is the pick if you want deep data — bloodwork logging, biomarker trends, and pattern detection across doses and metrics. PepTracker is a solid, no-frills choice for iOS beginners, and it has the largest review count of the peptide-specific apps here. Smart Peptide Tracker suits anyone who wants to pay once and be done with subscriptions — it runs on both platforms. Shotlee is a feature-heavy option with a free core tier and a serum-level predictor, synced across web and mobile. PeptIQ is worth a look if you want AI to help with data entry, like scanning a vial label instead of typing it in. PeptideKit is the other genuinely on-device app on this list, though it's iPhone only. Shotsy only tracks GLP-1 medications (Ozempic, Zepbound, and similar) — not peptides — so it's a different tool for a different job.

At-a-glance comparison

The privacy and inventory columns are where things split the most. Most of these apps assume you want an account and a cloud backup by default — reasonable for a lot of people, but it means your protocol history lives on someone else's server. Two apps here buck that: PeptideKit keeps data on-device, but it's iPhone only. StackLogR is the only app in this comparison that's fully on-device — no login screen, no server, local storage only — on both iOS and Android.

How we evaluated

We didn't score these apps on feature count. A tracker with forty features you never open is worse than one with ten you actually use. Here's what we weighted, in order:

1. Time to log a dose. Taps from opening the app to a saved entry — the biggest predictor of whether you're still using it in week six.
2. Reminder reliability. Does it nudge you at the right time without babysitting notification settings?
3. A free tier that's actually usable, not a trial that locks you out after three days.
4. Privacy stance. Account required? Where does data live? Can you delete everything in one step?
5. Inventory and vial awareness. Does it know what you have on hand, or just log what already happened?
6. Platform coverage. iOS, Android, or both, with an equal experience on each side.

Simplicity is the top criterion on purpose. A tracker only works if you open it every day, and every extra step between logging a dose and having it saved is a reason to skip logging it.

The apps, reviewed

1. StackLogR

We built StackLogR because we wanted a logger that didn't ask us to make an account just to write down that we took a dose. It's the newest app on this list — it doesn't have years of App Store reviews behind it the way some of these others do, and we're not going to pretend otherwise.

Pricing/platforms: iOS and Android. Free during early access — pricing may come later, and anything you log stays yours on your device either way.

Best for: People who want the fastest possible dose log and don't want their protocol history sitting on a server.

Strengths:

• Everything runs on-device — no account, no login, no cloud sync. Your data stays on your phone unless you choose to export it.
• A task-first “Today” dashboard that leads with what's due, plus dose logging tied to schedules, local reminders, and injection site tracking.
• Vial inventory tracking with beyond-use-date awareness, and a reconstitution/syringe math helper for mixing calculations — no dosing recommendations, just arithmetic.
• A built-in guide to 100+ compounds, written in plain language and deliberately non-prescriptive — no dose amounts, ever, by design. Useful both for looking up what you're already taking and for reading up on compounds you're curious about.
• A lab-tracking screen: log bloodwork values, get them flagged against reference ranges, and see the trend charted over time.
• Backups are local and encrypted: an export file protected by a passphrase you set, not an automatic cloud sync.

Trade-offs:

• It's brand new — no long review history, and features that are mature elsewhere (like lab tracking) are earlier-stage here.
• No Apple Health or Health Connect sync yet; wearable data has to be entered manually.
• No CSV or PDF export — the encrypted backup restores your own data, it doesn't produce a spreadsheet.

Verdict: If privacy and logging speed matter more than a mature feature set, StackLogR is worth trying — it's free and the only app here fully on-device on both iOS and Android. If you want years of reviews behind a tracker, it isn't that yet.

2. Regimen

Regimen leans hardest into data of anything on this list. It's built for people who want to see how their doses line up with bloodwork and other metrics over time, not just log that a dose happened.

Pricing/platforms: iOS and Android. Free tier covers one compound with full features; Premium is $4.99/month or $39.99/year with a 14-day trial.

Best for: Users running more than one compound who want lab and pattern data alongside their dose log.

Strengths:

• Reconstitution and dosing calculators built into the flow, plus Apple Health integration.
• Bloodwork logging with a “Signals” feature that connects doses to symptoms and health metrics over time.
• Half-life visualization for tracking how compounds are estimated to be moving through your system.
• Injection site rotation tracking and progress photos.
• Covers 200+ compounds across peptides, GLP-1s, and TRT.

Trade-offs:

• Free tier caps you at one compound with full features — anyone running a real stack hits the paywall fast.
• Requires an account and syncs to the cloud, the trade-off for that cross-device data intelligence.
• More of a learning curve than a bare-bones logger.

Verdict: If you're tracking labs and want an app that connects the dots, Regimen is the most data-forward option here — paid for with a subscription and an account. For a direct head-to-head, see StackLogR vs Regimen.

3. PepTracker

PepTracker keeps things closer to a straightforward dose log, and it shows in the App Store numbers — it has the largest rating count of the peptide-specific trackers we looked at.

Pricing/platforms: iOS only. Free with in-app purchases; Premium is $4.99/month or $47.99/year.

Best for: People new to tracking who want something simple and don't need an Android version.

Strengths:

• A built-in dose calculator for syringe volume math.
• Protocol creation and scheduling with calendar integration and reminders.
• Weight and progress metrics logged over time.
• Premium adds unlimited protocols, advanced scheduling, and CSV/PDF export.
• Active developer responses to reviews on the App Store listing.

Trade-offs:

• Free tier caps out at three protocols (recently raised from two), limiting if you're running more than a few compounds.
• iOS only — off the table if you're on Android.
• Requires an account — the App Store privacy label lists email, name, and user ID collected for app functionality.

Verdict: A dependable, well-reviewed choice on iPhone. Android users need to look elsewhere. For a direct head-to-head, see StackLogR vs PepTracker.

4. Smart Peptide Tracker

Smart Peptide Tracker's pitch is the opposite of a subscription: pay once, keep the features. It's built Android-first, syncing through Google's Health Connect, though it's also on iOS.

Pricing/platforms: iOS and Android. Core logging is free, ad-supported; premium features unlock with a one-time purchase rather than a subscription — the iOS listing publishes it at $34.99 for Premium Lifetime (with higher bundle tiers and add-ons also listed). The Android listing confirms the same one-time model but doesn't publish the price, so on that side you'll see the number in-app.

Best for: Anyone who doesn't want a recurring subscription for a tracking app.

Strengths:

• No account needed to start — the Play listing states sign-in is optional, only for sync and backup.
• Health Connect integration, so data from wearables and other Android health apps can feed in.
• A “Stack Analyzer” for looking at how compounds in a protocol relate to each other, plus a reconstitution calculator and injection site tracking.
• One-time purchase model — no recurring charge once you've paid for premium.
• Rated 4.6–4.8 stars across its store listings, among the higher ratings in this category.

Trade-offs:

• Core free tier is ad-supported; several premium features sit behind the one-time paywall.
• Some users report the app feels complex to configure at first.
• On Android, premium pricing isn't shown on the store listing — you only see the number in-app (the iOS listing does publish it).

Verdict: If subscription fatigue is real for you, this is the app built around that preference — on either platform.

5. Shotlee

Shotlee is a feature-dense tracker with a free core tier. It syncs across iOS, Android, and a web app, so your log looks the same wherever you open it.

Pricing/platforms: iOS, Android, and web, with real-time sync across all three. The core app is free; the store listings also show a Shotlee Pro subscription at $9.99/month or $49.99/year — despite the marketing site's “completely free” framing, so know a paid tier exists before you invest in it.

Best for: People who want a full-featured dashboard with a free core and don't mind their data syncing to the cloud.

Strengths:

• Dose logging and scheduling alongside medication/supply inventory with refill alerts and injection site rotation.
• A “Medication Level Predictor” that estimates serum levels and decay over time.
• Weight, BMI, blood pressure, mood, and energy tracking alongside doses.
• Handles both GLP-1 medications and research peptides, with support for running multiple protocols at once.

Trade-offs:

• Everything syncs to the cloud in real time — no on-device/no-account option. The App Store privacy label lists contact info and usage analytics as collected, which sits oddly next to the site's “privacy focused” language.
• The marketing site's numbers don't match the store: it cites 25,000+ users and 1,500+ reviews, while the current App Store listing shows only a handful of ratings. The site claims may span platforms or an earlier listing, but we can only verify what the stores show.
• The dashboard covers a lot of ground (health analytics, community features, AI insights) for someone who just wants a quick log.

Verdict: A capable, genuinely feature-rich tracker — but go in knowing the Pro tier exists and your data lives in their cloud. If privacy matters more to you than feature count, compare it against StackLogR or PeptideKit.

6. PeptIQ

PeptIQ's angle is letting AI handle the manual entry — scan a vial instead of typing it in, and ask a built-in research agent questions about your own logged history.

Pricing/platforms: iOS, Android, and a web app. Freemium — free tier includes basic logging, calculators, and a handful of protocol templates; premium adds the AI vial scanner and more. Store-listed subscription tiers run $9.99/week, $19.99/month, or $49.99–$99/year — the most expensive premium in this comparison.

Best for: People who'd rather scan or ask than type, and who want their data to sync across a phone and a browser.

Strengths:

• An AI vial scanner (premium) that reads a label instead of requiring manual entry.
• A research-agent chatbot that answers plain-language questions grounded in your own logged protocol and dose history, with source links on claims.
• Reconstitution, dosing, and unit-conversion calculators included free.
• Vial and inventory tracking with refill, low-stock, and expiration alerts.
• Wearable integrations across Apple Health, Google Fit, Whoop, and Oura, plus a real web app for reviewing data on a larger screen.

Trade-offs:

• Free tier's protocol templates are limited compared to premium.
• Premium is the priciest here — up to $99/year on the top tier, roughly 2.5× Regimen's annual price.
• Cloud-synced and account-based, like Regimen and Shotlee — the AI features need your data on their servers.

Verdict: The most technically ambitious app here, worth a look if AI-assisted entry appeals and cloud sync doesn't bother you.

7. PeptideKit

PeptideKit is the other app here making a genuine on-device privacy claim, not just a policy line about “we protect your data.” Their site is specific: health data stays on the device, stored locally, no online connection required.

Pricing/platforms: iOS only, requiring iOS 18.6 or later. The site doesn't discuss pricing, but the App Store listing shows subscription tiers at $3.99/week, $9.99/month, $39.99/year — and a $69.99 one-time lifetime option, one of two lifetime purchases in this comparison (Smart Peptide Tracker's is half the price).

Best for: iPhone users who want an on-device tracker with journaling built in and don't need Android or cross-device sync.

Strengths:

• Custom protocols with flexible scheduling — daily, weekly, bi-weekly, or monthly — plus smart reminders.
• An interactive, color-coded calendar showing completed, missed, and upcoming injections at a glance.
• Detailed journaling tied to specific doses, including side-effect and mood tracking.
• A built-in calculator for dosage math and unit conversions.
• A genuine on-device privacy claim: no online connection required, data stays local.

Trade-offs:

• iOS only — no Android version at all.
• Pricing only surfaces in the App Store listing, not on their site — and the weekly tier ($3.99/week ≈ $200/year if left running) is the kind of thing to notice before subscribing.
• Local-only means no cross-device sync — no way to check your log from a tablet or the web.

Verdict: If you're on iPhone and privacy is the top priority, PeptideKit is a legitimate on-device option. It just can't follow you to Android, and StackLogR is the only app here that matches its privacy stance on both mobile platforms.

8. Shotsy

Shotsy doesn't strictly belong on a “peptide tracker” list — it's built exclusively for GLP-1 medications like semaglutide and tirzepatide, not peptides such as BPC-157. We're including it because plenty of people searching “peptide tracker” are actually running a GLP-1 protocol.

Pricing/platforms: iOS and Android — nearly 29,000 App Store ratings plus a 100K-download Android app. Free download with a basic free tier; subscription tiers in the App Store run $9.99–$19.99/month and $39.99–$59.99/year depending on plan.

Best for: People tracking Ozempic, Wegovy, Mounjaro, Zepbound, or similar GLP-1 medications specifically — not general peptide protocols.

Strengths:

• Purpose-built for GLP-1 dosing schedules and injection tracking, with weight and side-effect tracking alongside doses.
• One of the highest review counts of any app in this space — nearly 29,000 ratings on the App Store.
• Polished, mature interface with a long track record.

Trade-offs:

• Doesn't track peptides at all — no BPC-157, no TB-500, no research compounds.
• The privacy story splits by platform: on iOS, data stays on-device and syncs through your own iCloud with no account, but the Android app uses Google Sign-In and Firebase, and its Play data-safety section discloses data sharing with third parties.
• Subscription-based, and not cheap relative to some alternatives here.

Verdict: The best app here for GLP-1 tracking specifically, and the wrong app entirely for a broader peptide stack. For a direct head-to-head, see StackLogR vs Shotsy.

How to pick

• You want the simplest, most private option and don't mind a newer app: StackLogR.
• You're running multiple compounds and want lab data tied to your doses: Regimen.
• You're on iPhone, new to tracking, and want something proven and simple: PepTracker.
• You don't want a subscription — pay once and be done: Smart Peptide Tracker.
• You want a free, full-featured dashboard and cloud sync doesn't bother you: Shotlee.
• You want AI to handle data entry and you're fine with cloud sync: PeptIQ.
• You're on iPhone, want on-device privacy, and also want journaling: PeptideKit.
• You're tracking GLP-1 medications, not peptides: Shotsy.

FAQ

What is the best peptide tracker app in 2026?

It depends what you value most. StackLogR is the best peptide tracker app for privacy and simplicity — no account, nothing leaves your phone, on both iOS and Android. Regimen wins on lab tracking and pattern detection; Shotlee is the pick for a free, feature-heavy dashboard.

Is there a free peptide tracker app?

Yes. StackLogR is free during early access with no paid tier at all. Shotlee, Regimen, PepTracker, Smart Peptide Tracker, and PeptIQ all offer free tiers too, though each caps something before you hit a paywall — Shotlee's store listing includes a Pro subscription despite the “completely free” framing on its site.

Which peptide tracker works on Android?

For a peptide tracker app Android users can actually rely on, StackLogR, Regimen, Smart Peptide Tracker, Shotlee, and PeptIQ all have native Android apps — and Shotsy does too, though it only tracks GLP-1s. PepTracker and PeptideKit are the iOS-only holdouts.

Can I track GLP-1s and peptides in the same app?

Most of these apps handle both — Regimen, PepTracker, Smart Peptide Tracker, Shotlee, and PeptIQ all support GLP-1 alongside peptide and TRT tracking. Shotsy is the exception: GLP-1 only, no peptides.

Is a peptide tracker app better than a spreadsheet?

For most people, yes, mainly because of reminders and speed — a spreadsheet doesn't nudge you when a dose is due. The real advantage shows up over months, when you need to answer “what did I actually take, and when” without scrolling through rows. If you want to start with a spreadsheet anyway, we made a free peptide tracker spreadsheet template.

Do peptide tracker apps need an account?

Most of the apps here do, since they sync to a server for cloud backup or cross-device access. PeptideKit is a genuine exception on iOS, storing data locally with no account, though it skips Android — and Smart Peptide Tracker starts without an account too, with sign-in optional for sync. StackLogR is the only app that's fully on-device with no account on both iOS and Android.

How do peptide tracker reminders work?

They run on your phone's notification system, triggered by the schedule you set up in the app, and fire even if you haven't opened the app in a while. In StackLogR's case, reminders are scheduled entirely on your device — no server involved, consistent with the rest of the app.

Do peptide tracker apps include information about the compounds themselves?

Some do. Regimen covers 200+ compounds in its library, and PeptIQ has an AI chatbot for quick reference questions. StackLogR ships a built-in guide to 100+ compounds written in plain language — what each one is, how it's typically categorized, and what people track it for — so you can look up your own compounds or read about ones you've only heard of. It's deliberately educational, not prescriptive: no dose amounts, no recommendations, just clear explanations.

What's the easiest peptide tracker for beginners?

PepTracker and StackLogR are both built around a minimal number of steps to log a dose. PepTracker has the longer track record on iOS; StackLogR is simpler still and also works on Android.

Disclaimer

This article is for informational purposes only and isn't medical advice. StackLogR and the other apps covered here are logging and organizational tools, not medical devices, and none of them replace guidance from a doctor or pharmacist. Always talk to a qualified healthcare provider about any protocol, medication, or supplement before starting it.