PepStak vs NextDose.AI

PepStak is the all-in-one peptide tracker: plan your stacks, calculate exact doses, log every injection, and see your active levels in real time. SEE REAL-TIME PEPTIDE LEVELS Know what's actually in your system. PepStak models each peptide's active level from your logged doses and half-life, so you always know where you stand. CALCULATE EXACT DOSES The reconstitution calculator turns vial size, bacteriostatic water, and target dose into exact syringe units — no more napkin math before every injection. STACK MULTIPLE PEPTIDES Build goal-based stacks that group your peptides, schedules, and progress in one place. Track duration, weight intent, and completion as you go. LOG SMARTER INJECTIONS The interactive body map shows your recent injection sites with rotation guidance and best-site suggestions, so you never overuse a spot. STAY CONSISTENT Dose reminders keep you on schedule. Daily check-ins track energy, mood, sleep, appetite, and side effects so you can see how your protocol is really going. TRACK YOUR PROGRESS Progress photos and weight tracking put your results side by side with your protocol history. COMPREHENSIVE PEPTIDE LIBRARY Browse 100+ peptides with detailed profiles, or create custom peptides to match exactly what you're running. SYNC & BACKUP Secure cloud sync keeps your data safe and available across devices. — PepStak is a tracking and organization tool. It does not provide medical advice and does not sell or supply peptides. Always consult a licensed healthcare provider before starting any protocol. Some features require a PepStak Pro subscription. Payment is charged to your Apple ID account; subscriptions renew automatically unless canceled at least 24 hours before the end of the period. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Track your testosterone, weight loss, GLP-1s, peptides, and any compound, all in one simple app, with an AI that works from your real logged data. NextDose.AI is the all-in-one tracker for anyone running peptides, GLP-1s (semaglutide, tirzepatide), testosterone/ TRT therapy, or any research compound. Scan your vial, snap your bloodwork, and log every shot. Then watch your estimated pharmacokinetic curves update throughout the day. LOSING WEIGHT ON A GLP-1? Log your weekly shot, track your weight, and watch your progress week by week and month by month. Simple and clear, so you always know where you stand and where you're headed. TRACKING TESTOSTERONE OR TRT? Log your protocol and watch your total testosterone, free testosterone, estradiol, and full panel charted over time, right next to your doses. See how your levels move as your protocol changes. YOUR BLOODWORK, MADE CLEAR Snap any lab or blood test and NextDose transcribes your values, charts every marker over time, and flags what's above or below standard reference ranges with plain-language, research-cited context. It organizes and tracks your numbers. It does not diagnose. AN AI BUILT AROUND YOUR STACK This isn't a notes app with a calendar. NextDose's research assistant draws on your logged data plus a large library of peer-reviewed studies. Ask about dosing windows, half-lives, or how compounds interact, and it surfaces the relevant research next to your own numbers. It always cites the research, never prescribes a dose, and points you back to your physician. KEY FEATURES • Weight & GLP-1 Progress. Log your weekly shot, track your weight and body composition, and chart your progress over time. • Testosterone & TRT Tracking. Chart testosterone, estradiol, and your full hormone panel against your protocol. • Bloodwork Analysis & Charting. Snap any lab, auto-transcribe your values, and trend every marker with above and below range flags and research context. • Agentic AI Research Assistant. Grounded in your data and a large peer-reviewed research library. • Estimated Pharmacokinetic Curves. Modeled rise, peak, and clearance for every logged dose, hour by hour. • AI Vial Scanner. Point your camera and the strength and concentration auto-fill. • 100+ Compound Library. Peptides, GLP-1s, TRT, and popular performance compounds, with linked research. • Syringe & Reconstitution Calculator. Enter your concentration and target dose and it converts to syringe units. No math. • Interaction Notes. Surfaces documented interactions reported in the research for compounds you've logged. • Apple Health Sync. Weight, body fat, heart rate, HRV, and sleep. • Recovery Readiness. A daily score blending HRV, resting heart rate, and sleep trends. • Injection Site Rotation. A visual body map tracks your injection history and rotation points. • Morning Briefing. A daily AI summary of your logged doses, trends, and today's schedule. WHO IT'S FOR GLP-1 users tracking weight loss and metabolic progress. Peptide users tracking recovery and longevity. TRT patients tracking testosterone and ancillaries. Athletes and biohackers tracking performance and lab trends. YOUR DATA, YOUR CONTROL Encrypted and private. We never sell your data. Apple Health stays on-device unless you sync. Cancel and delete anytime. NEXTDOSE PREMIUM NextDose Premium unlocks every feature. The annual plan includes a 7-day free trial and is offered at a discount; a monthly option is also available. Subscriptions auto-renew unless canceled at least 24 hours before the current period ends, and you can manage or cancel anytime in your Apple ID settings. NextDose.AI is an educational compound tracker for adults 18+. It is not medical advice and not a substitute for a qualified healthcare professional. We do not sell, prescribe, recommend, or diagnose any compound or lab result. Always consult your physician. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/