Peptify vs ThinkLeft
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Peptify
This app provides comprehensive tools for tracking peptide protocols, including advanced pharmacokinetic modeling, bloodwork analysis, and educational resources. It helps users monitor their progress, understand compound interactions, and generate reports for healthcare providers.
- Pharmacokinetic modeling
- Bloodwork analysis and import
- Research-backed compound library
- Professional PDF report generation
- Body composition tracking
- Educational courses and quizzes
- Protocol and injection site management
Read full descriptionHide full description
Peptify is the most complete peptide protocol tracker on iPhone and Apple Watch: precise tracking, real AI insights, and a full education system. Track every peptide, GLP-1, and TRT shot. Scan your bloodwork. See what's working. WHAT MAKES PEPTIFY DIFFERENT: See exactly when your levels peak. A two-compartment pharmacokinetic engine models your active compound levels in real time from the doses you log, with timing scenarios for a missed dose or a schedule change. Real AI that knows your data. Ask Peptify gives streaming answers grounded in what you track. The Peptify Brain studies your peptides, supplements, blood work, and body scans. Link Apple Health and it sees your sleep, weight, and heart rate too. Every user gets one free AI analysis. Scan your bloodwork. See what changed. Import labs via camera, PDF, or manual entry. 80+ biomarkers, out-of-range flags, and results correlated with your protocol timeline. Every claim is backed by research. PubMed citations across 61 compounds, evidence strength ratings, and mechanisms of action explained. Generate a report your provider will respect. Multi-page PDF exports covering protocol, bloodwork trends, and adherence, plus 5 shareable cards. Track what's happening to your body. 30+ body composition metrics, DEXA and InBody OCR, and progress photos with a before/after slider. TRACK TOGETHER: Community: Share progress, post milestones and protocols, and follow others. Friends: Add friends and control exactly what you share. Invite a friend and you both get 1 week of Pro free. Benchmarks powered by real, anonymous community data. LEARN WHILE YOU TRACK: 4 courses, 32 lessons, and quizzes: fundamentals, research literacy, protocols, and compound deep dives. Daily Challenge, XP, 7 levels, earnable badges, and learning streaks. Two mini-games: Half-Life Rush and Stack Builder. 61-compound library with literature-reported ranges, stacking notes, and safety information. THE COMPLETE TOOLKIT: Supplement tracking with a 60+ entry library: doses, timing, synergies. Reconstitution guide: mixing steps, syringe types, and storage. Protocol builder that records your provider's titration, cycling, and washout schedule. Injection site rotation with a body diagram. Vial inventory with auto-depletion and low-stock alerts. Interaction checker for combination safety and timing conflicts. Smart notifications with snooze and quiet hours. Dynamic Island and Live Activities. Apple Watch app: log a dose in three taps from your wrist, synced to your iPhone instantly. Cost tracking, side effect logging, adherence streaks, and a rearrangeable dashboard. PEPTIFY PRO: Tracking, education, widgets, and the Watch app are free. Pro unlocks unlimited Ask Peptify, full blood work and body composition history, unlimited vials and scans, cost tracking, interaction checker, benchmarks, and provider PDF exports. Monthly, annual, and lifetime options are shown in the app. PRIVATE BY DESIGN: No account required. Everything works on-device from day one. Sign in with Apple or Google is optional; it unlocks Community, Friends, and backup. Optional Face ID or Touch ID app lock. Your health data is never sold. WHO IT'S FOR: Whether you run a single GLP-1 protocol or a multi-compound stack, Peptify helps you track precisely, learn the science, and talk clearly with your provider. DISCLAIMER: Peptify is a personal record-keeper for educational and tracking purposes only. It is not a medical device and does not provide medical advice, diagnosis, treatment recommendations, or dosage guidance. It never calculates, recommends, or adjusts a dose: every amount in the app is one you entered from your prescribing provider's instructions. Always consult a licensed physician before starting, stopping, or changing any medication, supplement, or treatment. Terms of Use: https://peptify.rork.app/terms Privacy Policy: https://peptify.rork.app/privacy
ThinkLeft
This app helps you make better decisions by capturing choices, protecting them from rushed moments, and learning which conditions support your best calls. It builds evidence from your own decisions without ads or trackers, offering insights into personal patterns.
- Private decision logging
- Decision Plans with deadlines
- Outcome rating and analysis
- Personal pattern discovery
- Readiness check-in
- Home Screen widget
- Face ID app lock
Read full descriptionHide full description
Your next important decision should not depend on whatever focus happens to be left. ThinkLeft is private decision support for real life. Capture a choice, protect it from rushed or depleted moments, and learn which conditions tend to support your best calls. Instead of giving you generic productivity advice, ThinkLeft helps you build evidence from your own decisions—without an account, ads, or advertising trackers. MAKE SPACE FOR THE DECISIONS THAT MATTER Log a choice in seconds, mark how important it is, and capture useful context such as feeling rushed, tired, stressed, calm, hungry, or caffeinated. When the timing is wrong, park the decision instead of forcing it. Create a Decision Plan with a deadline, a candidate window, and an optional if–then action. ThinkLeft can add a private Calendar block and remind you when it is time to return. LEARN FROM WHAT HAPPENS NEXT Close the loop by rating completed decisions as a good call, fine, or regretted. Over time, ThinkLeft surfaces associations in your own record with visible sample counts and clear limits. You can explore how sleep, mood, movement, timing, and decision context relate to your outcomes. These are personal patterns—not diagnoses, scores of your worth, or promises about the future. KNOW WHEN TO PAUSE Your daily signal combines decision load, time of day, and optional on-device context. A transparent breakdown shows what contributed to the estimate, helping you decide whether to act now, simplify the choice, or protect it for later. BUILT FOR REAL LIFE - Fast decision logging and outcome follow-ups - Decision queue and protected Decision Plans - Optional if–then actions, Calendar blocks, and reminders - Readiness check-in before starting a parked choice - Weekly decision review and personal experiments - Optional sleep, mood, movement, and calendar context - Recovery break timer - Home Screen widget - Siri and Shortcuts actions - Face ID app lock - Portable backup and restore PRIVATE BY DEFAULT ThinkLeft does not require an account. Your decision record and HealthKit data stay on your device. There are no ads, advertising analytics, or cross-app tracking. Optional data sources are permission-based, and you can delete your local record at any time. THINKLEFT PRO Start with the daily dashboard, decision logging, planning, weekly review, and backups. ThinkLeft Pro turns repeated patterns into a practical seven-day Decision Playbook and unlocks deeper sleep, mood, timing, and outcome correlations. ThinkLeft is an informational wellness tool, not a medical device. Its estimates and associations are not medical advice. Privacy Policy: https://chvnnel.github.io/thinkleft-legal/privacy/ Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: ThinkLeft at 5.0 against Peptify's 4.3. ThinkLeft also leads on ads (none vs shown) and update cadence (daily vs every 4 days). Peptify's advantage is ratings volume (23 vs 1). On price, in-app purchases, monetization model 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. Peptify sells 3 in-app purchases, starting at $4.99 per month and ThinkLeft sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
ThinkLeft holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Peptify has 23 ratings behind it against 1, so its average is the more settled of the two.
Peptify ships an update every 4 days, ThinkLeft daily. The most recent releases landed on October 9, 2026 and September 26, 2026 respectively.
| Parameter | Peptify | ThinkLeft |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (23 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 85.7% of reviews | — |
| Number of ratings | 23 — better | 1 |
| Update frequency | Every 4 days | Daily — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Freemium |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPad |
| Requires iOS | 18.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 84 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Peptify LLC | Jean Gonzalez |
Customer experience
Peptify
ThinkLeft
In-app purchases
Peptify
- Peptify Pro Monthly$4.991 Month
- Peptify Pro Annual3 Days trial$29.991 Year
- Lifetime Access$89.99
ThinkLeft
- Pro Monthly$1.991 Month
- Pro Yearly$14.991 Year
- Pro Lifetime$29.99









