Peptide Calendar vs Stacksy
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Peptide Calendar
Manage personal peptide protocols with a clinician. Track progress, log daily check-ins, and monitor wellness trends. Includes a reference library and optional Apple Health integration.
- Personal protocol management
- Schedule and check-in logging
- In-app reminders
- Wellness trend tracking
- Apple Health integration
- Peptide reference library
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Peptide Calendar — Plan, Track & Reflect A private, organized place to manage the peptide protocols you choose with your clinician. Record the details you enter, follow your schedule, log completed check-ins, and review wellness trends in a calm, iPhone-first experience. FEATURES - Create and manage personal protocols using details you provide - View schedules and log completed check-ins - Set in-app reminders; external calendar sync unlocks after the first paid billing period - Track mood, energy, sleep, weight, and nutrition - Optionally connect Apple Health for permission-controlled wellness data - Browse an educational peptide reference library with general information only — no dosing or administration instructions - Sign in with Apple, Google, or email ACCESS Peptide Calendar is free to download. An active Peptide Calendar Pro subscription is required to create or import protocols, schedule injections, use in-app reminders and daily tracking, and view advanced wellness and adherence trends. If an eligible free trial is offered, those in-app features are available during the trial. External device-calendar connections and .ics export unlock after the first paid billing period begins. Subscriptions are purchased through your Apple Account and renew automatically unless canceled at least 24 hours before the end of the current period. Available plans, localized prices, and any eligible introductory offer are shown in the app before purchase. Manage or cancel subscriptions in your Apple Account settings. Restore Purchases and Redeem Offer Code are available directly from the paywall. Peptide Calendar is for educational and personal tracking purposes only. It does not provide medical advice, diagnosis, dosing, administration, or treatment recommendations. Consult a qualified healthcare professional before starting, stopping, or changing any protocol. Terms of Use: https://peptidecal.app/terms Privacy Policy: https://peptidecal.app/privacy You must be 17 or older to use Peptide Calendar.
Stacksy
Organize and track your personal peptide protocol with this private application. Manage your entire routine, including what peptides to take and when. Offers monthly and yearly subscription plans for full access.
- Organize peptide protocols
- Track peptide dosages
- Schedule peptide intake
- Private routine management
- GLP-1 tracking
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Stacksy is a simple, private way to organize and track your personal peptide protocol. Your whole routine in one place: what you're taking and when to take it. Stacksy requires a Premium auto-renewable subscription to use the app: - Stacksy Premium (Monthly): $9.99 / month - Stacksy Premium (Yearly): $39.99 / year Payment is charged to your Apple ID at purchase confirmation. Your subscription auto-renews unless cancelled at least 24 hours before the period ends. Manage or cancel anytime in your App Store account settings. Privacy Policy: https://stacksy.netlify.app/privacy Terms of Use (EULA): https://stacksy.netlify.app/terms
Screenshots
Verdict
The clearest difference is review sentiment: Stacksy at 100% against Peptide Calendar's 0%. Stacksy also leads on rating (5.0 vs 1.0) and ratings volume (16 vs 1). Peptide Calendar's advantage is monetization model (freemium vs subscription). On price, update cadence, 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. Peptide Calendar sells 2 in-app purchases, starting at $9.99 per month and Stacksy sells 5 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.
Stacksy holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: Stacksy has 16 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of Peptide Calendar's written reviews are positive against 100% of Stacksy's.
Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on October 18, 2026 and October 11, 2026 respectively.
| Parameter | Peptide Calendar | Stacksy |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) | 5.0 (16 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 16 — better |
| Update frequency | Every 2 days | Every 2 days |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium — better | Subscription |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.1 | 15.1 |
| Further details — not scored | ||
| Size | 45 MB | 65 MB |
| Age rating | 12+ | 17+ |
| Developer | KAYU Health, A Medical Corporation | Velor4 LLC |
Customer experience
Peptide Calendar
Stacksy
In-app purchases
Peptide Calendar
- Monthly Subscription7 Days trial$9.991 Month
- Yearly Subscription7 Days trial$79.991 Year
Stacksy
- Stacksy Pro (Monthly)$9.991 Month
- Stacksy Pro (Yearly)3 Days trial$24.991 Year
- Stacksy Pro (Yearly)7 Days trial$24.991 Year
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- Stacksy Pro (Yearly)$24.991 Year
- Stacksy Pro (Yearly)3 Days trial$39.991 Year
