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See it in the app
Lethal Dose is an offline Android app built for candidates preparing for the DABT (American Board of Toxicology) certification — flash cards, quiz banks, adaptive review, a dedicated Hard Questions category, and a full-length Practice Exam with selectable pacing, all on your device.
Coverage across core toxicology, organ systems, ICH/OECD guidances, and the DABT top-300 pharmacology list — with the engine paying closest attention to what you keep missing.
Flip-animated cards with text-to-speech on either side, a starred-cards shelf pulled from every category, and Auto-Play for hands-free review.
Multiple-choice quizzes per category with immediate color-coded feedback, plus quiz resume so you can pick up any quiz, Pop Quiz, or Practice Exam exactly where you left off.
Pulls your weakest questions across every category — accuracy under 70% — worst first, with a direct link back to the study section that fixes it. Optionally blends in Hard Questions at 25/50/75%.
A dedicated category written to match DABT-style format and difficulty. Blend it into Pop Quiz and Practice Exam at 25/50/75%, with separate personal bests tracked per blend level.
Coverage, accuracy, and mastery combine into one number, backed by a category chart, study streaks, and a quiz trend line, plus achievements and badges.
25, 50, or 100-question Practice Exams, weighted 70% toward your weak spots, with a category-by-category results breakdown and a personal best tracked separately for each Hard Questions blend level.
Tap any section to have it — and everything after it — read aloud, so you can study away from the screen.
Toggle Play and set independent flip and advance timers — cards turn and move on by themselves, so you can review without touching the screen.
Choose a pace from Slow to Turbo, including Normal at 1.8 minutes per question to match typical DABT timing. A color-coded countdown (amber, then red), Pause, per-question personal bests, and end-of-attempt time stats on both Practice Exam and Pop Quiz.
Export your starred cards, quiz history, and achievements to a file you control, and restore it anytime — still no cloud, no account, no sync.
Lethal Dose is free to download. Prices are shown in Google Play in your currency.
There is no trial clock — the free tier never expires.
Purchases are handled entirely by Google Play.
No accounts. No ads.
Open the app and every category is already there — no sync, no login screen, no waiting on a connection during an exam-week study session.
Lethal Dose was built offline-first on purpose — there's no account to create and no server to trust.
Lethal Dose is built directly against the American Board of Toxicology (DABT) certification blueprint — that's the app's primary use case. The core toxicology and regulatory content also overlaps meaningfully with a few adjacent certifications, and can serve as helpful supplementary review for graduate coursework in toxicology-adjacent degree programs, though the app isn't tailored to any specific exam format or curriculum.
Applied toxicology practice draws on the same mechanism-of-toxicity, risk assessment, and biotransformation fundamentals covered across Lethal Dose's core categories.
Shares the same general toxicology foundation, though ERT's regulatory framework differs from the ICH/FDA-oriented guidance content in the app.
The app's ICH and OECD guidance categories (M3, M4, Q3 series, OECD 408/413) touch directly on regulatory toxicology topics relevant to RAC, though RAC spans far more than toxicology alone.
Also a useful supplementary study aid for graduate coursework in toxicology-heavy degree programs — MS/MSc in Toxicology, MPH with environmental or occupational health focus, PharmD, and DVM/veterinary toxicology tracks — where the same core mechanisms and regulatory frameworks are covered.
Lethal Dose (LD50) is not affiliated with, endorsed by, sponsored by, or approved by the American Board of Toxicology (ABT), the United States Medical Licensing Examination (USMLE), or any other certifying or testing body. Offered as helpful subject-matter overlap, not an endorsement or affiliation — see the full Disclaimer.
Lethal Dose is built for board candidates — not a general reference, a study system with a score attached to it. Free to download. Five categories are free forever. Unlock everything with a monthly or yearly plan, or buy lifetime access. No ads.