The best peptide tracker apps in 2026

OptiPin – the deepest feature set, and the most private

OptiPin is built for the people running the most involved protocols – TRT plus an AI, a GLP-1, and a peptide stack all at once – who want everything in one place and want their health data to stay on their phone. There's no account and no OptiPin server; data lives on-device, with optional iCloud Sync across your own Apple devices.

It also goes deepest on the features that matter. Its testosterone and estradiol forecasting uses dedicated, ester-specific pharmacokinetic models that recalibrate to your bloodwork and show estimates against reference ranges – not a generic decay curve. OptiPin writes plain-language AI insight summaries that connect your dosing, Apple Health data, logged symptoms and mood and bloodwork. Regimen's Signals writes short observations about single trends; PepTracker has no equivalent. Titration schedules support automatic stepped dose changes. And it maps 115 injection sites (with left/right variants) for granular rotation, on top of a 200+ compound library, one-tap blend expansion (GLOW, KLOW, Wolverine and more), progress photos, and inventory tracking.

Where it falls short: iOS only – no Android or web app – so its iCloud Sync only reaches your other Apple devices.

Best for: anyone on a multi-compound protocol who wants the most capable, most private tracker. Get OptiPin on the App Store →

Since September 2026 it also reads your Apple Watch nights (or Whoop, Oura or Garmin data in Apple Health) into a nightly recovery score scored against your own last 60 nights. Health Trends then compares recovery on mornings after injection days with other mornings. It also compares HRV and sleeping heart rate in weeks on each compound against weeks off. PeptIQ is the other app here with a recovery score, taken from Oura or Apple Health.

Regimen – cross-platform, with a strong content library

Regimen's biggest genuine advantages are reach and content: it runs on iOS and Android with cloud sync, and it publishes an extensive library of free web calculators and articles. It also offers progress photos, daily check-in markers, and "Signals," an engine that correlates doses with symptoms and wearable data. Much of its feature breadth is well-presented on its marketing site – but on hormone modeling it doesn't lead OptiPin: its level curves are not re-fit to your bloodwork and it does not model estradiol or DHT. Its Signals flags single trends rather than writing a summary across your doses, labs and Health data. It does plan titration step-ups, track vials with low-stock alerts and scan lab reports.

Where it falls short: account-based and cloud-synced, so your data lives off-device – a trade-off if privacy is your priority – and the deeper hormone modeling and written insights aren't there.

Best for: Android users and people who want its content library and web tools, and are happy with a cloud account. See our detailed OptiPin vs Regimen comparison.

PepTracker – the simplest peptide log

PepTracker keeps things focused: build protocols, schedule injections, calculate syringe volumes with a clean visual, log doses, and watch weight trends. Its App Store reviews point to a smooth experience.

Where it falls short: it doesn't forecast blood levels pharmacokinetically, has lighter TRT/estradiol modeling, and no inventory tracking – it's a dose log first.

Best for: peptide and GLP-1 users who want a simple, polished log without the deeper hormone modeling. See our detailed OptiPin vs PepTracker comparison.

The rest of the field, by US ratings

The peptide tracker market moved fast in 2026. Several apps that launched this year now have more App Store ratings than the three above. Ratings are not quality, but they do show where people are. US App Store, checked 29 September 2026:

PeptidePal (Blank Labs) is the most-reviewed peptide tracker on the US store. It logs doses, tracks vial inventory, rotates sites on a heat-mapped body map and draws an estimated on-board level curve. It adds an AI Q&A advisor and a moderated community forum and runs on Android too. Protocol tracking needs a subscription ($9.99–14.99/mo or $19.99–59.99/yr in the US), and it does not model hormones. See OptiPin vs PeptidePal.

Peptide Tracker Log & Reminder (Flat Six Labs) has the highest star rating in the field at 4.9. It is free with no subscription or paywall (optional supporter purchases only) and runs on iOS and Android. It covers stacks, vials and supplies, estimated plasma levels, titration schedules, progress photos with side-by-side compare, an AI peptide assistant and a community of people on the same compounds. It uses an account.

Pep AI (Zode Development) layers an AI meal scanner and broad wellness tracking (nutrition, sleep, hydration, mood) on peptide logging, on iOS and Android. Peptide Tracker & Calculator is a no-account, on-device Apple tracker (optional iCloud sync) with inventory, concentration curves, bloodwork with lab-report scanning, progress photos and a compound builder for blends. See the Pep AI vs Peptide Tracker & Calculator comparison. PeptIQ runs on iOS, Android and the web, adds Oura and Health sync, an AI research chat, a community forum and streaks on top of logging and inventory, with a choice of on-device or cloud sync.

None of these apps models testosterone, estradiol or DHT against your bloodwork. That is still the thing only OptiPin does in this list.

How to choose

Pick on your top priority. The most capable, most private tracker (AI insight summaries, calibrated hormone modeling, no account) → OptiPin. You need Android, or want the content library → Regimen. A simple peptide log → PepTracker. The biggest community, or Android → PeptidePal. Free with no paywall → Peptide Tracker Log & Reminder. OptiPin, Regimen and PepTracker all have a free tier, so trying them costs nothing but a few minutes.