# PeakD4Y

> Harm Reduction Reference

Canonical page: [https://chrome-stats.com/d/id6760320337](https://chrome-stats.com/d/id6760320337)

## Overview

- **ID:** `id6760320337`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Kevin Kulcsar
- **Category:** Health & Fitness
- **Version:** 1.0
- **Last updated:** 2026-03-13
- **First published:** 2026-03-13
- **Size:** 3.48 MB
- **Data as of:** 2026-09-21
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/peakd4y/id6760320337)
- **Privacy policy:** [https://keniprimo.github.io/PeakD4Y/privacy.html](https://keniprimo.github.io/PeakD4Y/privacy.html)

## Description

Educational harm reduction reference. Research-backed pharmacokinetic data, drug interaction warnings, and safety information. Not medical advice.

SUBST4NCE is an educational harm reduction reference app providing research-backed pharmacokinetic data and drug interaction warnings.

IMPORTANT DISCLAIMER
This app is NOT a medical device and does NOT provide medical advice. It is a visualization and reference tool for educational purposes only. Always consult healthcare professionals for medical decisions.

WHAT'S INSIDE

Comprehensive Substance Database
• 80+ substances across multiple categories
• Published pharmacokinetic data (half-lives, metabolism pathways)
• Mechanism of action explanations
• Data quality indicators showing research confidence levels

Interaction Checker
• Check combinations of multiple substances
• Understand potential interaction mechanisms
• Color-coded risk levels based on published research
• Plain-language explanations of why interactions matter

Visual Timeline
• See pharmacokinetic curves for substances
• Understand onset, peak, and duration patterns
• Multi-substance overlay visualization
• Body load indicators

Personal Context (Optional)
• Add your biological factors for educational context
• Weight, metabolism, and health considerations
• Tolerance tracking
• Current medications reference

Research Citations
• Every data point linked to published sources
• PubMed IDs and DOIs for verification
• FDA and WHO reference data
• "Limited data" warnings for research chemicals

CATEGORIES COVERED
• Alcohol & Cannabinoids
• Stimulants & Depressants
• Psychedelics & Dissociatives
• Prescription medications
• Research chemicals (with appropriate warnings)
• And more...

SAFETY FEATURES
• Emergency resources always accessible
• SAMHSA helpline integration
• Non-judgmental, educational framing
• Privacy-first: all data stored locally on your device

DESIGNED FOR
• Harm reduction education
• Healthcare students and professionals
• Researchers and educators
• Anyone seeking evidence-based substance information

This app does NOT:
• Provide dosing recommendations
• Calculate "safe" times to drive
• Facilitate procurement
• Replace professional medical advice

All information is compiled from peer-reviewed research and official sources. Users accept full responsibility for how they use this educational reference.

18+ only. By using this app, you acknowledge the terms and conditions presented at first launch.

Questions or feedback? Contact us through the support link.

## Rankings

- #2,246,556 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6760320337)