# StackGuard — Powered by NIH & MFDS Data

> Powered by NIH & MFDS Data (iPhone/iPad app by Changmin Kwak.)

- Source: https://appshunter.io/ios/app/stackguard/id6762318577 (this page in markdown: same URL + `.md`)
- Developer: [Changmin Kwak](https://appshunter.io/developer/1893802660)
- Category: Health & Fitness
- Price: Free
- Age rating: 4+
- Requires: iOS 15.1 · 30 MB
- Languages: English, Korean
- Released: 2026-04-21
- Data updated: 2026-10-03
- User reviews in markdown: https://appshunter.io/ios/app/stackguard/id6762318577/reviews.md

## What is StackGuard?

For people stacking 10+ supplements who worry about overlap and overdose risk.

It's 2am. You're Googling 'magnesium + zinc absorption' for the third time this week. You take 11 supplements daily and you're not entirely sure they aren't canceling each other out.

StackGuard is built for serious supplement users — biohackers, nootropic stackers, athletes managing recovery protocols. If you've ever opened a spreadsheet at midnight to figure out whether your B6 dose is too high, this app is for you.

WHAT IT DOES
- Track 10+ supplements with timing and dosage
- Spot overlap before it happens (magnesium + zinc absorption conflicts, etc.)
- Detect overdose risk against NIH DSLD upper limits
- See effects over weeks — what's actually working
- Color-coded daily schedule for morning/midday/evening stacks

WHY IT EXISTS
Built by a solo dev who stacks 11 supplements daily and got tired of opening 6 browser tabs every time he added a new one. Made with paranoia. For paranoid users.

DATA SOURCES
- US NIH Dietary Supplement Label Database (DSLD)
- Korean MFDS supplement registry
- Conflict detection based on published absorption interaction research

PRIVACY
Your supplement data stays on your device. No analytics tracking what you take. No selling data to vitamin companies.

WHO IT'S NOT FOR
If you take 1-3 supplements casually, you probably don't need this. StackGuard is for the person whose pill organizer has more than 7 compartments.


## Version history (last 5 releases)

### 1.4.0 — 2026-06-04

v1.4.0 — StackGuard rebrand
- New app name in English: StackGuard
- Built for people stacking 10+ supplements
- Sharper messaging for serious supplement users
- Same core features: track stack, spot overlap, detect overdose risk

### 1.3.2 — 2026-05-12

v1.3.2 Update
- Cleaner home screen for new users
- Two clear options on launch: Get my picks or Register my supplements
- Faster path from launch to your first action

### 1.3.1 — 2026-04-29

v1.3.1 Update

- "Nutrients You Need" — clearer screen copy
- Quick-start "Set Health Goals" button on home empty state
- NIH official source label on every recommendation card
- Improved 6-step onboarding for new users
- "What's New" intro modal explains the new features

### 1.3.0 — 2026-04-28

v1.3.0 — Major update: Find Nutrients Your Body Needs

NEW FEATURES
- Personalized Nutrient Insight Engine — answer 7 simple questions about your goals and lifestyle, get 5 personalized nutrient recommendations
- Matching Products — see real Korean MFDS / US NIH DSLD products that match your nutrient needs
- 3 dedicated views: Solo products per nutrient, Combo products, Multivitamins
- Direct add-to-stack from product cards
- Auto-search on Coupang / iHerb from any product

IMPROVEMENTS
- Excipient filter so cosmetic ingredients (magnesium stearate, etc.) no longer pollute matches
- Smart locale-based product sourcing
- Faster, more reliable product search with auto-retry

PRIVACY
- All data stays on your device
- No signup required

### 1.1.4 — 2026-04-23

What's new in 1.1.4:

- English app name now shows as "Supplement Crash" on US devices
- Improved privacy consent flow for EU and California users (GDPR, CCPA)
- Updated store description with clearer feature highlights
- Minor stability and performance improvements

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-03.*