Synstax vs StackFlow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Synstax
This app helps you manage your supplement intake by checking for interactions between supplements and how your diet affects absorption. It features AI-powered label scanning, intake tracking, and personalized insights to optimize your routine.
- Supplement combination checker
- Diet-supplement absorption insights
- AI-powered label scanner
- Smart intake tracking
- AI analysis and chat
- Personalized scheduling
Read full descriptionHide full description
Synstax helps you organize supplement combinations, food effects, dosage, and timing in one place. SUPPLEMENT COMBINATION CHECKER Taking calcium with iron? Zinc with copper? Synstax reviews 5,142 curated combination records and explains timing considerations for each pair. • Insights appear as you add supplements • Clear importance levels and supporting context • Practical guidance on when to separate ingredients FOOD & SUPPLEMENT EFFECTS Recent coffee, tea, dairy, fiber, grapefruit, alcohol, soy, or spicy food can change the timing of a supplement routine. • 337 food-supplement rules across 8 food categories • Time-aware notes based on what you logged • Clear waiting guidance when a spacing interval is relevant INTAKE & DOSAGE TRACKING • Track recommended daily intake progress • Compare totals across products that share an ingredient • See upper-limit references and dosage notices AI LABEL SCANNER No barcode or product catalog required. • Photograph a Supplement Facts label • OCR + AI extracts ingredients and amounts • Matches 1,185 ingredient profiles and 12,000+ name variants • Recognizes brand and product names from the front label AI ANALYSIS & CHAT • Review product details, dosage context, and absorption notes • Ask questions about supplements, combinations, and timing • Receive context based on your products, schedule, and diet logs • Free tier: 30 AI queries per month. Pro: unlimited. SMART SCHEDULING • Organize supplements for morning, noon, evening, or bedtime • Build timing around combination and food-effect notes • Track daily intake and streaks BUILT FOR EVERYONE • 34 interface languages • Your records are stored on your device. AI features require internet access and send the relevant data for processing. • No account required Synstax Pro unlocks unlimited AI analysis and premium features. Synstax provides general wellness information and does not diagnose, treat, or replace professional advice. Consult a qualified professional before starting or changing a supplement routine. Terms of Use: https://synstax.uppervoid.app/terms Privacy Policy: https://synstax.uppervoid.app/privacy
StackFlow
This app helps you manage complex supplement routines by scanning labels, providing AI-driven timing suggestions based on ingredient interactions, and tracking your body's response. It visualizes synergy and spacing for optimal intake.
- AI-powered supplement timing
- Supplement label scanning
- Ingredient-level intelligence
- Synergy and spacing visualization
- Daily routine tracking
- Body response logging
- Daily insights feed
Read full descriptionHide full description
Taking multiple supplements every day? The hard part is not remembering them — it is knowing what goes together, what needs spacing, and when each one works best. StackFlow turns supplement chaos into a clear, executable daily system. BUILT ON 200K+ REAL SUPPLEMENT PRODUCTS Search or scan real products with real ingredients, real serving sizes, and real label facts — not a generic vitamin list. INGREDIENT-LEVEL INTELLIGENCE StackFlow maps each product to its actual ingredients, so you understand what you are really taking — not just the brand name on the bottle. SCAN A LABEL, ADD IN SECONDS Point your camera at any supplement label. StackFlow reads the product, maps the ingredients, and places it into your routine. AI TIMING PLANS THAT EXPLAIN WHY Get timing suggestions based on ingredient interactions, absorption rules, and your current stack. Every recommendation shows the reasoning behind it. SYNERGY AND SPACING, MADE VISIBLE See which supplements work better together, which ones need to be spaced apart, and why your routine is organized the way it is. YOUR DAILY COMMAND CENTER Open StackFlow each morning. See exactly what to take now, check off each time slot, and keep your routine moving without guesswork. TRACK HOW YOUR BODY RESPONDS Log energy, sleep, digestion, and other signals. Over time, connect your routine to what you actually notice. DAILY INSIGHTS FEED (PRO) Receive a curated daily digest based on your stack, check-ins, and patterns — not a generic health tip, but intelligence about your specific routine. StackFlow is built for people who take supplement routines seriously. It is not medical advice, diagnosis, or treatment. Privacy Policy: https://www.stackflow.life/privacy.html Terms of Use (EULA): https://www.stackflow.life/terms.html
Screenshots
Verdict
Synstax and StackFlow are too close to call on the numbers: across 10 compared parameters — price, rating, review sentiment and ratings volume among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Synstax sells 3 in-app purchases, starting at $4.99 per month and StackFlow sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for Synstax against 5.0 for StackFlow. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
Synstax ships an update every 3 weeks, StackFlow every 2 weeks. The most recent releases landed on October 11, 2026 and October 2, 2026 respectively.
| Parameter | Synstax | StackFlow |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 1 | 1 |
| Update frequency | Every 3 weeks | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 152 MB | 5 MB |
| Age rating | 12+ | 4+ |
| Developer | 宁 丁 | 航东 郭 |
Customer experience
Synstax
StackFlow
In-app purchases
Synstax
- Synstax Pro$4.991 Month
- Synstax Pro7 Days trial$29.991 Year
- Synstax Pro Lifetime$69.99
StackFlow
- StackFlow Pro Monthly1 Month trial$4.991 Month
- StackFlow Pro Annual$29.991 Year








