Boost vs Synstax
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Boost
Easily log your daily supplements and nutrition with gentle reminders and Apple Health sync. This app offers a clean, clutter-free interface for informed users who value privacy and simplicity in tracking their intake.
- Single-tap supplement check-off
- Log missed intakes from past days
- Apple Health sync
- Gentle reminders
- Planned daily intake overview
- Clean, clutter-free design
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Boost is a lightweight supplement and nutrition tracker built for people who already know what they take, and just want a clean way to track it. No pushy recommendations, no marketplace, no complicated dashboards. Just simple logging, Apple Health sync, and smart reminders that help your routine stick. What you get: • Check off supplements with a single tap, from notifications, widgets, or Apple Watch. • Quickly log missed intakes from past days. • Apple Health sync for your intakes • Gentle reminders at your chosen times. • See your planned daily intake across all supplements and nutritions. • Clean design, zero clutter • Available in English, German, Spanish, French, and Italian Privacy, by design: • No selling of your data. • No third‑party ads or embedded supplement shop. • No fishy AI advices. • No pushy upsells or “personalized” recommendations. Who it’s for: • Informed users who want a reliable, lightweight tracker. • People who value privacy and simplicity over noise and “growth hacks.” Disclaimer: Boost does not provide medical advice. Always consult a qualified professional for personal guidance. Apples standard Terms of Use apply: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://justasimple.app/privacy
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 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
Screenshots
Verdict
Boost and Synstax are too close to call on the numbers: across 8 compared parameters — price, review sentiment, update cadence and ads 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. Boost sells 4 in-app purchases, starting at $0.99 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.
Boost ships an update every 2 weeks, Synstax every 3 weeks. The most recent releases landed on September 28, 2026 and October 11, 2026 respectively.
| Parameter | Boost | Synstax |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 2 weeks — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone | iPhone |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 152 MB |
| Age rating | 4+ | 12+ |
| Developer | Rene Fischer | 宁 丁 |
Customer experience
Boost
Synstax
In-app purchases
Boost
- Monthly Support$0.991 Month
- 1 Cup of Coffee (Support)$1.99
- 1 Sandwich (Support)$4.99
- 1 Lunch (Support)$11.99
Synstax
- Synstax Pro$4.991 Month
- Synstax Pro7 Days trial$29.991 Year
- Synstax Pro Lifetime$69.99









