Stackr vs PepKit
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Stackr
Easily track supplements, peptides, and medications to ensure you never miss a dose or run out. Features include a compound library, reconstitution calculator, depletion tracking, and budget management.
- 200+ compound library
- Reconstitution calculator
- Depletion tracking
- Protocol grouping
- Budget tracking
- Dose logging
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Track your peptides, GLP-1s, and supplements without a spreadsheet. Start free — no account, no ads, no tracking. Stackr tells you exactly when to reorder, factoring in shipping time, so you never run out mid-protocol. FREE TO START Track up to 3 items free. No account required. Your data stays on your device. NEVER RUN OUT • Depletion tracking with color-coded urgency — see days remaining at a glance • Reorder alerts that factor in your vendor's shipping time • Restock history and reorder logging NEVER OVERPAY • Cost per dose, daily spend, and annual run-rate • Track what each vendor actually costs you RECONSTITUTION CALCULATOR • Vial size + BAC water + target dose → exact syringe markings • U100, U40, and standard mL syringes • Pre-mixed vials too (TRT, HCG) — enter mg/mL and go • Saves your calculations to the item PROTOCOLS THAT MATCH REAL LIFE • Injection-day scheduling and multi-compound protocols • Titration schedules — ramp your dose week by week • Cycling support with on/off day tracking • Injection site rotation LOG IT IN SECONDS • One-tap dose logging with automatic inventory decrement • 100+ compound library with autocomplete • Energy, mood, sleep, and recovery check-ins • Export everything to CSV PRIVATE BY DEFAULT Everything is stored on your device. No account needed. We don't sell your data, show ads, or track you across other apps. Optional cloud backup uses your email only — protected by row-level security so only you can read your own data. STACKR PRO Unlimited items, cloud sync across devices, titration schedules, cycling, custom alert thresholds, full restock history, vendor links, and CSV export. • Monthly: $4.99/month • Annual: $39.99/year (includes 3-day free trial) Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless canceled at least 24 hours before the end of the current period. Manage or cancel your subscription in your Apple ID account settings. Stackr is a personal tracking tool and does not provide medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional before starting, stopping, or changing any supplement, medication, or protocol. Terms of Use: https://www.mystackrapp.com/terms Privacy Policy: https://www.mystackrapp.com/privacy
PepKit
Precisely track your peptide protocols with a structured system. Log doses, calculate them accurately, and stay consistent with smart reminders and a clean interface. Designed for serious tracking.
- Precision dose logging
- Built-in dose calculator
- Structured scheduling
- Smart reminders
- Clean interface
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Track your peptide protocols with precision. Log every dose, stay consistent, and manage your protocol with a clean, structured system built for accuracy. PepKit is designed for users who take tracking seriously. Whether you're running a simple routine or a complex protocol, PepKit gives you the tools to stay organized and in control. Precision Tracking Log doses quickly and keep a clear record of your peptide protocols. No clutter. No confusion. Built-In Dose Calculator Calculate doses accurately without switching between apps. Stay precise every time. Structured Scheduling Set daily or weekly routines and stay consistent with your protocol. Smart Reminders Get notified when it’s time to log or follow your schedule. Clean, Minimal Interface Focused design built for speed, clarity, and usability. PepKit is built for consistency, structure, and precision. Everything is designed to help you track your protocol without friction. SUBSCRIPTION TERMS PepKit offers auto-renewing subscriptions for premium features. Payment will be charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. You can manage and cancel your subscriptions in your App Store account settings. Start with a 3-day free trial. A subscription is required for full access. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.pepkit.ai/privacy
Screenshots
Verdict
The clearest difference is update cadence: Stackr at every 4 days against PepKit's every 5 weeks. Stackr also leads on review sentiment (100% vs 86%) and device support (3 vs 1). PepKit's advantage is ratings volume (92 vs 8). On price, rating, ads and in-app purchases 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. Stackr sells 2 in-app purchases, starting at $4.99 per month and PepKit sells 2 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for Stackr against 4.9 for PepKit. That said, the two scores are not equally well evidenced: PepKit has 92 ratings behind it against 8, so its average is the more settled of the two. Written reviews are what separate them: 100% of Stackr's written reviews are positive against 86% of PepKit's.
Stackr ships an update every 4 days, PepKit every 5 weeks. The most recent releases landed on September 28, 2026 and October 1, 2026 respectively.
| Parameter | Stackr | PepKit |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (8 ratings) — better | 4.9 (92 ratings) |
| Positive reviews | 100.0% of reviews — better | 85.7% of reviews |
| Number of ratings | 8 | 92 — better |
| Update frequency | Every 4 days — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 26.0 |
| Further details — not scored | ||
| Size | 53 MB | 15 MB |
| Age rating | 12+ | 4+ |
| Developer | Alexander Hoogland | Loona LLC |
Customer experience
Stackr
PepKit
In-app purchases
Stackr
- Stackr Pro Monthly3 Days trial$4.991 Month
- Stackr Pro Annual3 Days trial$39.991 Year
PepKit
- Weekly7 Days trial$5.997 Days
- Annual7 Days trial$44.991 Year





