StackLogR vs Regimen: Simple & Private vs Deep & Data-Rich

If you're comparing StackLogR and Regimen, you're probably choosing between two different ideas of what a peptide tracker should do. Regimen is a data platform — bloodwork, pattern detection, cross-device sync, an account behind all of it. StackLogR is a calm logger — fewer features on purpose, everything on your phone, nothing behind a paywall. Neither is the “better” app in the abstract. They're built for different priorities, and this post tries to say plainly which one fits which reader.

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 Regimen is the better pick.

Last verified August 9, 2026, against Regimen's live App Store and Play Store listings.

The short version

Regimen is the right call if you're running a lab-driven protocol: you want bloodwork plotted against your dose timeline, pattern detection that connects the two, and an account that syncs your data across every device you own. Its free tier covers one compound; past that, it's a subscription.

StackLogR is the right call if you want the fastest possible daily logger, your full stack tracked with nothing paywalled, and a firm answer to “where does my data live” — your phone, and nowhere else. It's also worth saying plainly: StackLogR is pre-launch, live on an early-access waitlist rather than in the app stores yet, so it doesn't have the store history Regimen has built up.

At a glance

StackLogR is the only peptide tracker that's fully on-device on both iOS and Android — free, with no account.

Where Regimen wins

Credit where it's due. Regimen is the more capable app on several fronts, and if these are what you're looking for, it's the right pick:

• Bloodwork tied to your dose timeline. Regimen logs labs and, through its “Signals” feature, connects them to symptoms and other metrics over time — a real pattern-detection layer StackLogR doesn't have.
• Apple Health integration. Regimen pulls in data from Apple Health directly. StackLogR doesn't sync with Health yet, so anything you'd otherwise pull from a wearable has to be entered by hand.
• Reconstitution and dosing calculators, built in. Regimen's listings describe calculators for this math as part of the core flow.
• Progress photos. A feature StackLogR's fact sheet doesn't include at all.
• A larger compound library. Regimen covers 200+ compounds, roughly double StackLogR's 100+.
• Cross-device sync. An account and cloud backend mean your log follows you to a new phone or a second device without you managing an export file yourself.
• A longer track record. Regimen has around 302 App Store ratings behind it. It's also the most data-forward app in this niche — it's the one that publishes a “State of Peptide Tracking” report built from user analytics, which is a real signal of how seriously it treats data as a product feature. StackLogR structurally can't publish something like that: no telemetry means no aggregate data to report on, which is the flip side of being on-device.

If lab tracking and pattern detection are why you're looking at a tracker in the first place, Regimen is the more capable app. Full stop.

Where StackLogR wins

• Nothing is paywalled. Regimen's one-compound free tier is genuinely usable if you're only running a single compound, but a real multi-compound stack means Premium. StackLogR has no locked tier — the whole app, including inventory and reminders, is free.
• Fully on-device, no account, on both platforms. Regimen needs an account and a cloud connection to function. StackLogR runs entirely on-device — no login screen, no server round-trip — on both iOS and Android, which is a combination Regimen doesn't offer.
• Inventory with expiry awareness. StackLogR tracks vial and sealed-stock inventory with beyond-use-date tracking built in. Inventory isn't a stated focus of Regimen's listings.
• Reminders that go beyond the dose. StackLogR's local reminders cover dose, cycle, low stock, and vial expiry — Regimen's listings don't detail an equivalent reminder set.
• A day view built for speed. One-tap dose logging against a morning-to-night day view, so logging doesn't require navigating into a protocol screen first.
• Daily check-ins and a Monthly Story recap. A lighter-weight, habit-focused view of “how am I doing” rather than a clinical one.

If you're running a stack that doesn't need lab correlation and you want the least friction possible between “I took the dose” and “it's logged,” that's StackLogR's whole design brief.

For anyone managing several compounds at once and weighing whether they need Regimen's data depth or would be fine with a lighter system, our guide to organizing a peptide stack covers that exact fork — depth vs. simplicity — in more detail.

Pricing

Regimen's model is freemium: one compound, full-featured, free, no card needed to start. The moment you're running more than one compound, you're looking at Premium — $4.99/month or $39.99/year, with a 14-day trial to test it first. That's a reasonable price for what Signals and Apple Health integration add, if you're using them.

StackLogR's model is simpler because there's less of it: free during early access, with no compound cap and nothing behind a paywall today. That's not a promise about pricing forever — it's the pricing as of a pre-launch app — but as of right now, logging, inventory, reminders, and the compound guide all come at no cost.

Privacy and your data

This is the sharpest actual difference between the two apps, and it's worth being precise about why.

Regimen requires an account and syncs to the cloud — and that's not incidental, it's structural. Cross-device access and Signals pattern detection both depend on your doses and your bloodwork living on a server Regimen controls, because the app needs to see your data to connect the dots across time and devices. That's a real trade, and for someone who wants that analysis, it's a fair one to make.

StackLogR's answer is the opposite structure: everything stays on-device, on both iOS and Android, with no account and nothing to sync. There's no server involved because there's nothing for a server to do — logging, reminders, and inventory all run locally. That's also why StackLogR has no aggregate analytics to publish the way Regimen does with its “State of Peptide Tracking” report: no telemetry means no pooled data to report on in the first place. It's the same structural choice showing up as a trade-off in both directions — Regimen's cloud model enables the report; StackLogR's on-device model rules it out.

Neither model is a trick. Pick the one that matches what you actually want: analysis that requires your data to leave your phone, or a guarantee that it never does.

Which one should you pick?

• You're tracking bloodwork and want it connected to your doses: Regimen. Signals is a feature StackLogR doesn't have, and it's the reason to choose Regimen outright.
• You're only running one compound and don't mind an account: Regimen's free tier is a legitimate option, not a crippled trial.
• You want Apple Health synced automatically: Regimen, until StackLogR adds it.
• You're running multiple compounds and don't want a subscription: StackLogR — no paywall, whole app included.
• You want inventory and expiry tracking built in: StackLogR's vial and sealed-stock tracking is more developed than what Regimen's listings describe.
• You don't want an account or your data on a server, on either platform: StackLogR is the only one of the two that's on-device on both iOS and Android.
• You want a tracker with years of reviews behind it: Regimen, plainly — StackLogR is pre-launch and hasn't built that history yet.

For the full field, not just these two, see our comparison of 8 peptide tracker apps, which includes both of these along with the rest of the category.

FAQ

Is StackLogR really free?

Yes, during early access — logging, inventory, reminders, site rotation suggestions, the compound guide, and Monthly Story are all included with no paywalled tier. StackLogR is pre-launch right now, available through the waitlist at stacklogr.com rather than in the app stores.

Does Regimen have a free tier?

Yes, and it's a real one — Regimen's free tier covers one compound with full features, not a stripped-down trial. Premium ($4.99/mo or $39.99/yr, with a 14-day trial) is what you need once you're running more than one compound.

Which app is better for tracking labs?

Regimen, if labs are the point. It connects bloodwork to your dose timeline through Signals, its pattern-detection feature. StackLogR keeps labs simpler — you can log values, flag them against reference ranges, and watch trends, but there's no engine connecting them to your doses.

Which app is more private?

StackLogR. It runs fully on-device on both iOS and Android with no account and nothing synced to a server. Regimen requires an account and cloud sync to work — necessary for Signals and cross-device access, but a different privacy posture.

Does StackLogR work on Android?

Yes — StackLogR is built for iOS and Android at launch, both fully on-device. Regimen is also available on both platforms.

Is StackLogR available in the app stores yet?

Not yet. StackLogR is pre-launch — you can join the early-access waitlist, but it isn't a store download today the way Regimen is.

Does either app require a subscription?

Regimen does, once you're past one compound — $4.99/month or $39.99/year. StackLogR doesn't have a paid tier during early access; everything is free.

Can Regimen and StackLogR both track injection site rotation?

Yes, both offer it. Regimen's listings include site rotation tracking, and StackLogR builds in rotation suggestions as part of its inventory and logging flow.

Disclaimer

This article is for informational purposes only and isn't medical advice. StackLogR and Regimen 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.