Use the website to answer one combination at a time. Use the Synstax iPhone app to scan your bottles, check covered combinations across your list, build a daily schedule, and track what you take.
Every feature is designed to make your supplement routine clearer, easier to time, and easier to review.
Places each supplement into a time slot based on absorption needs, food effects, interaction gaps, and your daily routine.
The website helps with one pair at a time. The iPhone app checks covered combinations across the active supplements in your list and uses those findings when building your schedule.
Photograph the front and Supplement Facts panel. On-device OCR reads the label, and optional AI assistance can help identify ingredients, dosage, brand, and product name.
Log caffeine, alcohol, dairy, fiber, and grapefruit intake. See timing notes when food or drinks may affect your supplements.
Check in each supplement as you take it. Track streaks, completion rates, and build consistent habits.
1,185 ingredients with RDI, timing, food requirements, benefits, absorption tips, and recorded source references.
Practical guides based on public sources and research references. Tap to read.
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Read article →Many supplement stacks include combinations that compete for absorption. Here's how to check yours.
Read article →Timing can change absorption. A practical guide to supplement scheduling.
Read article →Yes. Core scheduling, conflict detection, diet tracking, and intake logging are free. Pro unlocks unlimited AI analysis, chat, and advanced dosage insights for $4.99/month or $29.99/year.
No. Synstax works immediately after download. No signup, email, or login is required. Your data stays on your device.
Yes. Scheduling, conflict detection, diet tracking, and intake logging all work without internet. Only AI-powered features (analysis, chat, enhanced OCR) require a connection.
34 languages: English, Chinese (Simplified & Traditional), German, French, Japanese, Korean, Spanish, Portuguese (Brazil & Portugal), Italian, Russian, Arabic, Turkish, Polish, Vietnamese, Thai, Indonesian, Malay, Hindi, Dutch, Catalan, Czech, Danish, Greek, Finnish, Hebrew, Croatian, Hungarian, Norwegian, Romanian, Slovak, Swedish, and Ukrainian.
The app database records source references including NIH, FDA, and research literature. Each web page shows the reference recorded for that combination, and reviewed guides link to the underlying sources.
Synstax focuses on supplement-supplement and diet-supplement interactions. It is not designed for drug interactions. Always consult your doctor or pharmacist about medication interactions.
All data is stored locally on your iPhone. We don't have servers that store your health data. AI features use an anonymous proxy; no personal information is sent or retained.
Unlimited AI product analysis, AI chat with your supplement stack, detailed dosage and intake insights (RDI/UL warnings), and diet interaction details. Free users get 30 AI queries per month.
Tap the "+" button, choose "Scan Label," and photograph the front and Supplement Facts panel. On-device OCR reads the label, and optional AI assistance can help identify ingredients, dosage, brand, and product name.
Currently iOS only (iPhone, iOS 17+). Android is not available at this time.