Supp Stack vs Synstax
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Supp Stack
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An organizer app for managing multiple supplements as stacks (groups). [Stack Management] Group supplements by purpose such as morning, workout, or night. Log all supplements in a stack with a single tap, or check off individual items when needed. [Calendar View] View your intake history on a monthly calendar with color-coded dots for each stack. Tap any date to see detailed records and spot missed days at a glance. [Streaks and Statistics] Stay motivated with a streak counter for consecutive logging days. View completion rates per stack and a GitHub-style activity heatmap for the past year. [Inventory Tracking] Register bottle quantities and the app auto-calculates remaining supply from your logs. Get notified when stock runs low so you never run out. [Cost Tracking] Enter prices per supplement and see total monthly and yearly costs. Break down costs by stack to understand your spending. [Flexible Scheduling] Set schedules for daily, specific weekdays, gym days, or ON/OFF cycles. Reminders notify you at the right time so you never miss a dose. [Data Management] Export and import your data in JSON format for easy backup and restore.
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
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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 supplement data stays on your device • 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
Screenshots
Verdict
The clearest difference is ads: Synstax at none against Supp Stack's shown. Supp Stack's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price, update cadence and in-app purchases 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. Supp Stack sells 2 in-app purchases, starting at $4.99 per month and Synstax sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 13, 2026 and August 11, 2026 respectively.
| Parameter | Supp Stack | Synstax |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 78 MB | 151 MB |
| Age rating | 4+ | 4+ |
| Developer | kota tada | 宁 丁 |
In-app purchases
Supp Stack
- Premium (1 month)7 Days trial$4.991 Month
- Premium (1 year)14 Days trial$49.991 Year
Synstax
- Synstax Pro$4.991 Month
- Synstax Pro7 Days trial$29.991 Year
- Synstax Pro Lifetime$69.99





