Protocol vs Stacker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Protocol
This app helps users meticulously track peptide cycles, logging each injection with customizable details. It provides comprehensive guides on reconstitution, injection techniques, and safety, alongside personalized reminders and progress tracking.
- Log peptide injections with customizable details
- Curated library of 25+ compounds
- Add custom compounds and edit entries
- Streak counter and dose history
- Per-peptide reminders with native iOS notifications
- Built-in safety and how-to guides
- Personalized onboarding based on goals and experience
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Protocol is the ultimate lab app for your peptide cycles — a premium iOS tracker for people who treat their stack seriously. Log every injection in micrograms, ride the streak, and keep your reconstitution, injection technique, and safety guides one tap away. WHAT YOU CAN DO Build your stack - Add from a curated library of 25+ compounds: BPC-157, TB-500, Tirzepatide, Cagrilintide, Retatrutide, Semaglutide, GHK-Cu, CJC-1295 (no DAC), Ipamorelin, Sermorelin, Tesamorelin, NAD+, MOTS-c, Humanin, SS-31, AOD-9604, Pinealon, Selank, Semax, DSIP, PT-141, KPV, Thymosin alpha-1, VIP, SLU-PP-332. - Configure each entry: dose amount in micrograms, milligrams, or IU; frequency (daily, every other day, twice daily, post-workout, weekly, custom); a color tag; private notes. - Add custom compounds outside the library. Edit or pause any entry at any time. Log doses in one tap - The Today screen shows your full stack. Tap "Log" — the dose is recorded with the right amount, unit, and timestamp. - Mistapped? Undo the last log instantly. - A day badge shows how many doses you've taken for each peptide today (×1, ×2, ×3). Streaks and history - Streak counter on Today and Profile counts consecutive days with at least one dose. - "This week" and "All time" totals sit next to the streak. - Pull to refresh; everything syncs to the cloud the moment you tap. Reminders that match real protocols - Per-peptide reminders: pick times of day, days of week, AM/PM windows, post-workout cues. - Native iOS notifications, respectful of Do Not Disturb and Focus modes. - The Notifications screen logs every reminder fire and streak milestone in one feed. Built-in safety and how-to guide - 10 in-app chapters written for the peptide-curious and the long-cycle stacker: • Important disclaimer — what this app is and isn't • Your first cycle — where to start • Reconstitution — mixing lyophilized peptides safely • Injection technique (subQ) in 6 steps • Storage & shelf life — lyophilized vs reconstituted • Side effects — common, rare, and red flags • Stacking & cycling — combinations that make sense • Bloodwork to monitor — what to test and when • Sourcing & purity — how to verify what you're injecting • Legal status — know what's allowed where you live Tailored from day one - Onboarding asks two questions: what are you here for (recovery, longevity, performance, GH, cognitive, metabolic, sleep, sexual, immune, skin, weight loss) and your experience level (new, some experience, advanced). - Library and protocol suggestions adjust accordingly. Edit goals & experience anytime from your profile. Profile and identity - Display name, handle, bio, avatar. - At-a-glance stats: total doses logged, current streak, active goals. - Sign in with Email or Google. Privacy-first — no social feed, no public timeline, no follower count. WHAT'S INTENTIONAL - No ads, no social feed, no in-app purchases inside the tracker. - Your data stays yours. WHO IT'S FOR - People running 1–5 compounds at a time who keep their dose log in Notes and forget which vial they're three days into. - First-cycle users who want a clean reference for reconstitution and injection technique before they self-experiment. - Long-cycle stackers who want streaks, weekly volume, and full historical doses on tap. DISCLAIMER Peptide is a tracking and reference tool, not a medical device. Nothing in the app is medical advice or a prescription. Consult a qualified physician before starting any protocol. TERMS OF USE https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Stacker
This app helps you discover peptide stacks tailored to your health goals, track your routine with smart reminders, and monitor your progress with photos and metrics. It also features a peptide library and an AI assistant for information.
- Personalized stack recommendations
- Curated peptide stack library
- Routine and progress tracking
- Smart scheduling and reminders
- Peptide information catalog
- AI peptide assistant (Pro)
- Partnered product purchasing (Pro)
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Stacker is the peptide stack tracker. It's built to help you find the right stack for your goals, stay consistent, and track whether it's actually working. Most peptide apps stop at "remind me." Stacker takes you from goal → stack → results. BUILD YOUR PERSONALIZED STACK Tell us your goals — fat loss, muscle, recovery, skin, longevity, sleep — and Stacker recommends a named stack (LEAN, GLOW, Wolverine, KLOW) or the individual peptides that fit. Every stack comes with a clear schedule you can adjust. CURATED STACKS Browse popular stacks with clear overviews, timelines, and difficulty levels — so you understand GLP-3, BPC-157, TB-500, retatrutide, tesamorelin and more, not just their names. TRACK YOUR ROUTINE & PROGRESS Log each dose you take in a tap, keep your streak, and watch your "Day X of N" protocol progress. Capture progress photos to see changes over time, and run check-ins on the metrics that matter for your goal. SCHEDULES & SMART REMINDERS Daily, weekly, or custom — Stacker builds your schedule, anchors it to your real start date, and sends reminders so you never miss a log. Evening catch-up nudges keep you honest. PEPTIDE LIBRARY A growing catalog with mechanisms, research status, cycle lengths, common stacks, storage tips, and what to watch for — so you go from research to a routine in one place. AI PEPTIDE ASSISTANT Ask anything and get instant, informational summaries of peptides, stacks, and your schedule. (Stacker Pro) BUY WITH MEMBER PRICING Order products through partner checkout, with member pricing on partnered products. (Stacker Pro) PRIVATE BY DEFAULT Your stacks, metrics, and photos are yours. We don't sell your data, and you can delete your account anytime. Stacker Pro Unlock progress photos, the AI peptide assistant, unlimited tracking, member pricing, and research & news. Stacker Pro is an auto-renewing annual subscription with a 3-day free trial. Payment is charged to your Apple Account after the trial; auto-renews until canceled. Manage or cancel anytime in Settings. Terms: https://usestacker.app/terms Privacy: https://usestacker.app/privacy Stacker is for educational and informational purposes only and is not medical advice. Stacker does not provide dosing advice — log the dose from your product directions or healthcare provider. Always consult a qualified healthcare provider before starting any peptide protocol.
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Verdict
The clearest difference is ads: Protocol at none against Stacker's shown. Protocol also leads on monetization model (free vs free with in-app purchases) and rating (5.0 vs 4.8). Stacker's advantage is ratings volume (26 vs 1). On price, update cadence, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Protocol sells 2 in-app purchases, starting at $1.99 per 7 days and Stacker sells 3 in-app purchases, starting at $49.99 per year. Whichever you choose, the download price is not the number that matters.
Protocol holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Stacker has 26 ratings behind it against 1, so its average is the more settled of the two.
Protocol ships an update every 2 days, Stacker every 4 days. The most recent releases landed on November 5, 2026 and November 13, 2026 respectively.
| Parameter | Protocol | Stacker |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.8 (26 ratings) |
| Positive reviews | — | 85.7% of reviews |
| Number of ratings | 1 | 26 — better |
| Update frequency | Every 2 days — better | Every 4 days |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone | iPhone |
| Requires iOS | 17.5 | 17.0 — better |
| Further details — not scored | ||
| Size | 47 MB | 52 MB |
| Age rating | 12+ | 17+ |
| Developer | Alexandre Masmejean | Above Capital LLC |
In-app purchases
Protocol
- Protocol Pro7 Days trial$1.997 Days
- Protocol Pro1 Year trial$39.991 Year
Stacker
- Stacker Pro$49.991 Year
- Stacker Pro3 Days trial$69.991 Year
- Stacker Pro3 Days trial$129.991 Year









