StackLogR vs PepTracker: Two Simple Trackers, One Big Fork

Most peptide trackers compete on how much data they can layer onto a dose log — bloodwork panels, pattern detection, provider reports. StackLogR and PepTracker both opted out of that race. Neither wants to be a dashboard. Both are built around the same idea: open the app, log the dose, get back to your day.

That's what makes this comparison different from the others in this series. It isn't simple versus complex. It's two apps that already agree on simple, forking hard on three things: which platforms they run on, whether they ask for an account, and what they charge. If you're searching “StackLogR vs PepTracker” or looking for a PepTracker alternative, that fork is almost certainly what you're trying to sort out.

StackLogR is our app, so read this knowing who wrote it — we've tried to keep every factual claim verifiable and to say plainly where PepTracker is the better pick.

Last verified August 9, 2026, against StackLogR's own product details and PepTracker's live App Store listing.

The short version

PepTracker is the established one: iOS only, a free tier that now covers up to three protocols, a Premium tier for unlimited protocols and export, and the largest App Store review count of any peptide-specific tracker. StackLogR is the newer one: iOS and Android, free with nothing paywalled, no account required, and fully on-device — but it's pre-launch, so it doesn't have PepTracker's review history to point to. If you want the fuller field, our comparison of eight peptide tracker apps puts both of these next to Regimen, Shotsy, and the rest.

At a glance

Where PepTracker wins

Credit where it's due — PepTracker has real things going for it, and they're not small:

• The track record. Roughly 432 App Store ratings is the largest review base of any peptide-specific tracker we've checked. That's years of people using it, complaining about it, and sticking around anyway — a kind of proof a brand-new app can't manufacture.
• A developer who ships. PepTracker raised its free-tier limit from two protocols to three in an October 2025 update. That's a small change, but it's evidence of an app that's actively maintained, not abandoned after launch.
• Three free protocols is genuinely plenty for a lot of people. If you're running one or two compounds, PepTracker's free tier isn't a stripped-down trial — it's a usable app you may never need to pay for.
• Calendar and export, if you need them. Premium adds calendar sync so your schedule shows up alongside the rest of your life, plus CSV/PDF export for handing a clinician or coach a clean record. StackLogR doesn't have an export-report feature at all — its backup is an encrypted file for restoring your own data, not for printing or sharing.
• A built-in dose calculator and progress tracking. PepTracker includes syringe-volume math and weight/progress metrics alongside the log itself.

If you're on iPhone only and want the app with the longer history behind it, that's a legitimate reason to pick PepTracker over something newer.

Where StackLogR wins

• It's on Android. This is the biggest structural gap between the two. PepTracker is iOS only — full stop, no Android version at any tier. StackLogR runs natively on both iOS and Android with the same feature set on each side. If you're not on an iPhone, or your household is split across platforms, PepTracker isn't in the running at all.
• No account, on either platform. PepTracker requires creating an account, and its App Store privacy label lists email, name, and user ID as data collected and linked to your identity. StackLogR doesn't ask for a login on either platform — there's no account to create in the first place.
• Everything is free, not just the entry tier. PepTracker's free tier covers up to three protocols; running more, or wanting advanced scheduling and export, means Premium. StackLogR has no paywall for logging, inventory, reminders, site rotation, or the compound guide — none of it sits behind a subscription.
• Fully on-device. Because there's no account, there's no cloud copy of your data on a server anywhere. Backups are local and encrypted, protected by a passphrase you set and hold yourself.
• Inventory, site rotation, and a compound guide. StackLogR tracks vial and sealed stock with beyond-use-date awareness, suggests your next injection site, and ships a 100+ entry compound guide written with zero dose amounts by policy. None of these are a stated focus of PepTracker.

Put simply: StackLogR is the only peptide tracker that's fully on-device on both iOS and Android — free, with no account. PepTracker's simplicity stops at the App Store border; StackLogR's doesn't.

The Android point is worth sitting with on its own, because it's not a minor feature gap — it's the whole category of person PepTracker structurally can't serve. If you're on Android, or you and a partner are split between an iPhone and an Android phone and want to compare notes, PepTracker was never going to be the answer. That's StackLogR's clearest lane in this comparison.

Pricing

PepTracker is freemium: free covers up to three protocols, and Premium is $4.99/month or $47.99/year for unlimited protocols, advanced scheduling, and CSV/PDF export. That's a normal, fair structure — you get a real app for free and pay only if you outgrow it.

StackLogR is free during early access, with nothing held back behind a paywall. We're not pretending that's a permanent promise — pricing may come later once the app is out of early access — but as of today, and for anything you log now, there's no premium tier to compare against PepTracker's.

Privacy and your data

PepTracker requires an account to use. Its App Store privacy label discloses that email, name, and user ID are collected and linked to your identity for app functionality. That's a normal setup for an account-based app — but it does mean there's an identity attached to your use of a peptide tracker, which is exactly the thing some people in this category want to avoid.

StackLogR is on-device on both platforms: no login screen, no account, no server your data passes through. What you log stays on your phone. If you want a backup, it's an encrypted export file protected by a passphrase only you hold — not an automatic cloud sync.

One honest caveat that cuts the other way: StackLogR is pre-launch, available through the waitlist at stacklogr.com rather than in the App Store or Play Store yet. There's no store listing, no public review history, and no way to verify our on-device claim the way you can verify PepTracker's privacy label — you're taking our word for it until the app ships. That's a real trade-off against PepTracker's track record, and it's fair to weigh it that way.

Which one should you pick?

• You're on iPhone only, three protocols covers your stack, and you want an app with years of reviews behind it: PepTracker.
• You want calendar sync or CSV/PDF export and don't mind paying for Premium: PepTracker.
• You're on Android, or your household spans both platforms: StackLogR — PepTracker isn't an option here at any price.
• You don't want to create an account, and you want everything free with nothing paywalled: StackLogR, keeping in mind it's pre-launch.
• You want inventory tracking, site-rotation suggestions, or a compound guide built in: StackLogR — none of these are a current focus of PepTracker.
• You want the safest, most proven pick today and don't mind a subscription later if you outgrow the free tier: PepTracker.

FAQ

Is PepTracker available on Android?

No. PepTracker is iOS only, at every tier. If you need an Android app, StackLogR is built for both iOS and Android with the same features on each.

Does PepTracker require an account?

Yes. Its App Store privacy label lists email, name, and user ID as data collected and linked to your identity. StackLogR doesn't require an account on either platform.

Is StackLogR really free?

Yes, during early access — logging, inventory, reminders, site rotation, and the compound guide are all included with nothing paywalled. We haven't announced pricing beyond early access.

Which app has more reviews?

PepTracker, by a wide margin — roughly 432 App Store ratings, the largest review count of any peptide-specific tracker we've checked. StackLogR is pre-launch and doesn't have a store listing or review history yet; that's the honest trade against PepTracker's track record.

Can I export my data from either app?

PepTracker's Premium tier adds CSV and PDF export. StackLogR doesn't currently have an export-report feature — its backup is an encrypted file meant to restore your own data, not to print or hand to someone else.

Is StackLogR available in the App Store or Play Store yet?

Not yet. StackLogR is pre-launch, accessible through the early access waitlist at stacklogr.com rather than a store listing. Both platforms are planned at launch.

What's a good PepTracker alternative for Android users?

StackLogR is the direct answer if platform is the reason you're looking — it's the free, on-device option built for both iOS and Android. A few other Android-capable trackers exist too, including Regimen and Smart Peptide Tracker — see the short version above for where to compare all of them at once.

Disclaimer

This article is for informational purposes only and isn't medical advice. StackLogR and PepTracker are logging and organizational tools, not medical devices, and neither replaces guidance from a doctor or pharmacist. Talk to a qualified healthcare provider about any protocol before starting it.