Peptidia vs Loop
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Peptidia
This app allows users to privately track their peptide usage, including product details, amounts, and personal observations. It also provides a comprehensive, evidence-backed encyclopedia of peptide research with direct links to scientific sources.
- Private lab for recording peptide usage
- Personal journal for mood and notes
- Integration with Apple Health
- Visual vault for organizing vials
- Curated peptide profiles with evidence passports
- Direct links to research sources
- Research Watch with literature alerts
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Track your peptide journey and check the evidence behind the claims. Peptidia brings a private Lab together with a source-backed peptide encyclopedia. Keep personal records organized, follow your observations over time, and explore research with the Peptarch as your guide. YOUR PRIVATE LAB • Record products, amounts, routes, and subcutaneous sites. See your day's records beside an anatomy map. • Convert amounts using the concentration and syringe scale you enter. • Keep a journal of mood, energy, sleep, and personal notes. • Connect Apple Health, if you choose, to view weight, resting heart rate, sleep, and steps. Glucose and blood pressure are separately optional. • Explore dated observations and trends. Changes over time do not establish that a peptide caused them. • Organize vials in a visual Vault. Record fridge or freezer history, preparation details, and dates from your label or pharmacy instructions. • Set private check-in and vial-date reminders. New Lab records are encrypted on your iPhone, excluded from backups, and never sent to Peptidia's servers or the Peptarch. Apple Health access is read-only and optional. Earlier cloud journal entries are copied into the Lab once, automatically; their server copies remain until account deletion. RESEARCH YOU CAN CHECK • 80+ curated peptide profiles in English and French • Research Watch, with weekly literature checks and optional alerts when indexed evidence changes • Evidence Passports showing research maturity, source depth, strongest source tier, and review date • Direct links to PubMed, DOI sources, and clinical trials • A library ordered around your research interests • The Peptarch, a research assistant with citations you can inspect • No ads, vendors, or affiliate links LEARN WITH THE PEPTARCH Explore sourced anatomy and measurement references, or test your understanding in short quizzes with explanations and practice for missed questions. Educational math starts with empty fields and uses only the values you enter. A guided, animated welcome introduces Evidence, Peptarch, Learn, and the Lab. Your research interests still shape the library. Peptidia provides education and personal recordkeeping. It does not provide medical advice, diagnose or treat conditions, generate protocols, or recommend taking anything. Library content and AI responses do not provide specific peptide doses. Consult a licensed healthcare professional with health questions. Vial records and reminders do not establish product safety or shelf life. Peptidia is for adults 18+. It is not intended for use during pregnancy or breastfeeding, with active cancer, or by anyone under 18. SUBSCRIPTION Peptidia Pro Monthly: $9.99/month, no free trial. The subscription automatically renews unless canceled at least 24 hours before the end of the current period. A limited $59.99 lifetime option may be available. Manage subscriptions in iPhone Settings > Apple Account > Subscriptions. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://peptidia.app/legal/privacy
Loop
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Loop is a private, easy-to-use tracker for your peptide, GLP-1, or TRT injection routine. It keeps your schedule, dose history, reminders, supplies, and injection sites organized in one place - so you can stay consistent without spreadsheets or guesswork. Loop is a personal tracking tool. It does not provide medical advice, dosing recommendations, or any way to obtain medications. Always follow the guidance of a qualified healthcare professional. WHAT YOU CAN DO WITH LOOP • Build your schedule - set up recurring injections and see your whole routine at a glance • Log every dose - keep a clear, private history of what you recorded and when • Stay on time - reminders so you never miss a scheduled dose • Track your supply - know how much you have left and reorder in time • Rotate injection sites - log sites on a body map to keep your rotation organized PRIVATE BY DESIGN Your data is yours. Loop is built around privacy, with secure sign-in and full control over your information, including in-app account deletion. LOOP PRO Loop requires a subscription to use. Choose a monthly or yearly plan; the yearly plan may include an introductory free trial where offered. Payment is charged to your Apple ID at confirmation of purchase. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before the period ends. Manage or cancel anytime in your App Store account settings. HEALTH DISCLAIMER Loop is designed for personal tracking and educational purposes only. It is not intended to provide medical advice, diagnosis, treatment recommendations, or dosing instructions. Always consult a qualified healthcare provider for any medical decisions or health concerns. All features are for personal record-keeping and educational reference only. Privacy Policy: https://tryloop.health/privacy-policy Terms of Service: https://tryloop.health/terms-of-service Support: hello@tryloop.health
Screenshots
Verdict
The clearest difference is update cadence: Peptidia at every 11 days against Loop's every 2 months. Peptidia also leads on iOS requirement (15.1 vs 26.5). On price, ads, 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. Peptidia sells 3 in-app purchases, starting at $9.99 per month and Loop sells 3 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.
Peptidia ships an update every 11 days, Loop every 2 months. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.
| Parameter | Peptidia | Loop |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 11 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 26.5 |
| Further details — not scored | ||
| Size | 61 MB | 37 MB |
| Age rating | 17+ | 4+ |
| Developer | DR DAVE INC. | ROK POPOVIC |
In-app purchases
Peptidia
- Peptidia Pro1 Month trial$9.991 Month
- Peptidia Monthly$9.991 Month
- Peptidia Lifetime$59.99
Loop
- Loop Pro - Monthly$9.991 Month
- Loop Pro - Yearly Offer$29.991 Year
- Loop Pro - Yearly3 Days trial$39.991 Year









