user guide

level ll is a real-time harm reduction app for iPhone. It uses pharmacokinetic modeling to track your intoxication on a 0–11 scale, warns you about dangerous substance interactions, gives personalized dose recommendations, and provides emergency tools — all on-device, all private.

The two bars in the logo hold three meanings: ll is 11 — the scale at the core of the app. They represent two lines — a nod to substance culture. And they form a pause button — a reminder to stop, breathe, and take a conscious break.

The app flows through three phases: Idle (your home screen when sober), Consume (active session with real-time tracking), and Recover (aftercare and wellbeing check-ins). The app transitions automatically between phases based on your state.

22 Substances across 8 Categories + Medication Flags

Each with full dosing ranges, timing data, routes, risks, safer-use tips, and drug checking links. Browse the library →

When you first open level ll, the app guides you through a 10-step onboarding:

You can skip the walkthrough and jump straight to profile setup. All data stays on your device. Nothing is uploaded.

When you’re sober, the app shows the Idle screen — your home dashboard:

• Hero Greeting — Personalized welcome with your name and time-of-day greeting.
• Quick Log — Large “Log a Dose” button front and center.
• Favorites — Quick-access chips for your favorite substances.
• Prepare Card — Pre-session planning: combination checker and safer use review.
• Learn Card — Access the substance education hub with pharmacology, risks, and harm reduction tips.
• Personal Insights — Smart observations from your usage history.
• Last Session — Quick summary of your most recent session with feedback rating.
• Session Counter — Total sessions tracked over your profile’s lifetime.

The app automatically transitions to the Consume screen when you log a dose, and to Recover when your session ends.

Tap “Log Dose” on the home screen to open the dose logger.

Safety Checks

Before logging, the app automatically checks for:

• Interaction Warning — If the new substance creates a dangerous combination with what’s already active, you’ll see a warning. You can still proceed, but you’ll be informed of the risk.
• Redose Warning — If you’re dosing again within the onset window of the same substance, you’ll be warned that the first dose may not have fully kicked in yet.
• Nasal Guide — For nasal doses, a visual guide shows proportional line widths for each person’s dose, so you can divide accurately.

After logging, a confirmation banner appears with an undo button (available for 3.5 seconds).

Once you log a dose, the app switches to the Consume view — your real-time session dashboard:

• Level Display — A large animated number (0–11) with a breathing glow effect colored by intensity. Tap it to open the Session Timeline.
• Active Substance Chips — Category-colored chips showing what’s active.
• Warning Banner — Color-coded interaction warnings with expandable details.
• GHB Timer — 2-hour locked redose countdown when G is active.
• Active Doses List — Each dose with route, amount, time logged, and decay progress.
• Baseline Estimate — Countdown showing exactly when you’ll return to sober.
• In-Session Tips — Substance-specific care advice (hydration, temperature, jaw tension, etc.).
• Log More / End Session — Action buttons at the bottom.

Tap the level display during an active session to open the timeline chart:

• Level-over-time chart — Color-coded area chart showing your intoxication curve from session start to projected baseline.
• Dose markers — Dashed vertical lines marking when each dose was logged, with substance labels.
• Current level dot — Pulsing indicator showing where you are right now on the curve.
• Peak & current stats — Cards showing your peak level and current level at a glance.
• Full dose log — Scrollable list of every dose in the session with substance, route, amount, and time.

The chart updates every 30 seconds and uses adaptive sampling for smooth curves.

level ll automatically monitors your active substances and profile for risky situations. Warnings are color-coded by severity:

• Info — Good to know. Example: “Wait 6–8 weeks between MDMA uses.”
• Caution — Be careful. Example: stimulants masking alcohol intoxication.
• Warning — Significant risk. Example: serotonin syndrome from mixing serotonergics, cardiovascular strain from stacking stimulants.
• Danger — Life-threatening. Example: respiratory depression (opioids + depressants), GHB/GBL + alcohol, SSRIs + MDMA.

Key Dangers the App Detects

• Respiratory Depression — Opioids combined with depressants. “Have naloxone ready.”
• GHB/GBL + Alcohol — Lethal combination. “This kills.”
• GHB/GBL Redosing — Within 90 minutes: “DO NOT REDOSE G” — the most common cause of G-lock. Also warns during the 4-hour rebound period.
• GHB + GBL Stacking — Taking both together is flagged as a danger-level interaction.
• Serotonin Syndrome — SSRIs or multiple serotonergic substances active together.
• Cardiovascular Strain — Multiple stimulants stacked, cocaine + MDMA within 1 hour (cardiac risk), stimulants while alcohol is wearing off (seizure risk).

Warnings appear on the home screen (top 3 shown) and can be snoozed for 30 minutes. Calm Mode in settings softens the visual intensity of non-danger warnings if you find them distracting.

When your session ends and substances decay to baseline, the app transitions to the Recover view:

• Normalization Card — Reassuring message with a progress indicator showing how far along recovery you are.
• Substance-Specific Tips — Timed aftercare hints organized by category: Nutrition, Sleep, Mental Health, Physical, and Social. Content adapts to which substances were used (e.g., serotonin recovery after MDMA).
• Wellbeing Check-ins — Daily prompts for 7 days: rate your mood (1–5), energy (1–5), sleep quality (1–5), and optional notes. Tracked as a visual timeline showing your recovery trend.
• Check-in History — See all previous check-ins with day-after-session labels.

Access from the Idle screen via the Learn card. A comprehensive substance education hub:

• Harm Reduction Essentials — Horizontally scrollable cards covering Always Weigh, Test Your Stuff, Hydrate Smart, Buddy System, Know Your Limits, and Start Low Go Slow.
• Substance Browser — All 22 substances filterable by category with search. Each substance card shows category, routes, and a short description.
• Substance Detail Pages — Tap any substance to see:
  • Route-specific timing (onset, peak, duration, half-life)
  • Dosing tiers (light, common, strong) per route
  • Risks and safer use tips
  • Drug checking resources
  • Pharmacology (primary mechanism, receptors, neurotransmitters, body effects, metabolism) when available
  • Link to Nasal Line Guide for substances with nasal route

A visual reference for nasal substances, accessible from the Learn section’s substance detail pages:

• Visual line bars — Proportional colored bars showing the physical length of light, common, and strong lines based on the substance’s bulk density.
• Dose & dimensions — Each tier shows the dose in mg and approximate line length in centimeters.
• Substance-specific — Line sizes differ because each powder has a different density (e.g., cocaine vs. ketamine vs. amphetamine).
• Safer Snorting Tips — Included below the line guide: use your own clean straw, alternate nostrils, saline rinse before and after, crush to fine powder, avoid sharing tools.

An interactive, scrollable matrix showing the safety profile of every possible substance pair:

• 24 entries — All 22 tracked substances plus SSRIs and MAOIs as medication interaction flags.
• 7 risk levels — Low Risk & Synergy (green), Low Risk & No Synergy (blue), Low Risk & Decrease (yellow), Caution (orange), Unsafe (red), Dangerous (dark red), Same Substance (grey).
• Tap any cell — Opens a detail view explaining the specific risks, mechanisms, and harm reduction advice for that combination.
• Based on TripSit data — Sourced from established harm reduction databases and clinical literature.

The app uses this data automatically when you log doses — checking the matrix and triggering interaction warnings in real time.

Appears on the Consume screen when GHB or GBL is active. The most common cause of GHB/GBL overdose is redosing too early — this timer prevents that.

• 2-hour countdown — A locked timer starts after you log GHB or GBL. It counts down 2 hours before allowing redose.
• Visual lock — The button stays locked and clearly shows the remaining time.
• Warning reminder — When the timer expires, the app shows a safety reminder before you can log another dose.

This feature exists because even experienced users misjudge GHB/GBL timing. The app enforces the minimum safe interval.

“I Need Help”

If you’re in distress, this mode provides immediate calming tools:

• Reassurance — “You are safe. What you’re feeling is temporary.”
• 4-7-8 Breathing — Guided breathing exercise: inhale 4 seconds, hold 7 seconds, exhale 8 seconds. Repeat 3–4 times.
• 5-4-3-2-1 Grounding — Engage your senses: 5 things you see, 4 you touch, 3 you hear, 2 you smell, 1 you taste.
• Call for help — Quick buttons to call a trusted person or emergency services (localized to your country: 112, 911, 999, 000).

“Help Someone”

If someone near you needs help:

• Glasgow Coma Scale (GCS) — A clinical assessment tool. Rate the person’s eye opening (1–4), verbal response (1–5), and motor response (1–6). The app calculates a total score and tells you the severity: green (13–15, mild), orange (9–12, moderate), red (≤8, severe — call emergency).
• Overdose Checklist — Step-by-step: check responsiveness, call emergency, recovery position, stay with them, inform paramedics of substances taken.
• Harm Reduction Tips — Stay hydrated (not too much), don’t mix depressants, take breaks in cool areas, never use alone.

A trip-safe UI toggle designed for when you’re in an altered state and aggressive visuals could increase anxiety:

• Softened colors — Reds become ambers, oranges become warm taupes. The overall palette shifts to calming, grounded tones.
• Reduced animations — Pulsing glows and breathing effects are muted.
• Supportive language — Warning messages use gentler phrasing.
• Danger stays visible — Life-threatening warnings (respiratory depression, lethal combos) remain at full intensity regardless of Calm Mode.

Toggle Calm Mode in Settings, or it can be suggested automatically by the SOS flow.

Your data is sensitive. level ll provides multiple layers of protection:

• Biometric Lock — Enable App Lock in Settings to require Face ID, Touch ID, or Optic ID every time you open the app. Authentication resets when the app goes to background.
• On-Device Only — All data (doses, sessions, profiles, check-ins) stays on your iPhone. Nothing is transmitted to any server.
• AES-256 Encryption — Optional encryption for all stored data. Keys are stored securely in the device keychain.
• No Tracking — No analytics on what you log. The website uses anonymous page-view analytics only.

Profiles

You can create multiple profiles — useful for tracking different people or situations. Each profile stores:

• Basics — Name, emoji avatar.
• Physiology — Age, weight, sex. Used to calculate metabolism speed and personalize dose recommendations.
• Health — Neurodivergent status, medications (SSRIs, MAOIs, heart meds, etc.), personal intoxication limit.
• Pro-Level — 1 (Beginner) to 5 (Very Experienced). Adjusts communication style and dose suggestions.
• Favorites — Quick-access substance shortcuts on the dose logging screen and Idle screen.
• Tolerances — Advanced two-layer system: Subjective (manually set 0–11) and Computed (auto-adjusted from use). Effective tolerance = 60% subjective + 40% computed.

Settings

Found via the profile/settings icon on the Idle screen:

• Calm Mode — Trip-safe UI toggle (see above).
• Live Activity — Show session info on Lock Screen and Dynamic Island.
• App Lock — Require Face ID / Touch ID to open the app.
• Data Encryption — Optional AES-256 encryption for all stored data.
• Session Feedback — Post-session form with 1–5 star rating, mood emoji, side effects checklist, and automatic tolerance adjustment suggestions.

• Log before you take — Log the dose right before you take it for the most accurate timeline. The app starts the pharmacokinetic clock at the moment you log.
• Set your personal limit — In your profile, set the level where you want to stop. The app warns you as you approach it.
• Use presets — The Light/Common/Strong presets are personalized to your profile. They account for your weight, tolerance, and health factors.
• Tap your level — During a session, tap the level display to see the full timeline chart. Check where your level is headed before redosing.
• Don’t ignore danger warnings — Caution and info warnings can be snoozed. Danger warnings exist because the combination can kill.
• Know SOS before you need it — Explore the Emergency SOS features while sober so you know where everything is.
• Use the Learn section — Read up on substances before using them. The pharmacology, risks, and safer use tips can prevent harm.
• Keep your profile accurate — Update your weight, tolerance levels, and medication status. Accurate data means better dose recommendations and warnings.
• Check before you mix — Use the Combination Checker or the Drug Combo Matrix before mixing substances.
• Use the GHB/GBL timer — If you use GHB or GBL, never skip the 2-hour redose timer. Redosing too early is the most common cause of G overdose.
• Don’t skip recovery — The aftercare tips and wellbeing check-ins help you recover better. The 7-day check-ins track patterns over time.
• Enable App Lock — If privacy is a concern, turn on biometric app lock in Settings.

Questions?

Email us at support@level11.app or visit Support.