Drive Sober vs Permille

Drive Sober is a BAC calculator and alcohol tracker that helps you estimate when your blood alcohol concentration may fall below your selected driving limit. Free to use — no subscriptions or hidden fees. Small ads help support development and keep the app free. Choose your country, log drinks in seconds, and follow a clear estimated timeline showing how your BAC may rise, peak, and fall over time. If you're wondering when you may be below the legal BAC limit after drinking — including the next morning — Drive Sober gives you a cautious estimate, not permission to drive. IMPORTANT This app provides estimates only and must never be relied upon to decide whether you are legally or medically fit to drive. If you have been drinking, the safest option is not to drive. FEATURES Estimated BAC Timeline • Visual blood alcohol timeline • Estimated rise and reduction over time • Selected driving-limit line • Red, amber, and green risk zones • Key estimated times • Clear countdowns as your estimate changes Quick Drink Logging • Add common drinks in seconds • Beer, lager, and cider • Wine and sparkling wine • Spirits • Cocktails and mixed drinks • Food and meals • Save favorite and custom drinks for faster logging Apple Watch & Siri • Apple Watch support • Siri support for quicker access to supported actions Live Activities & Alerts • Follow key countdown information from the Lock Screen • Dynamic Island support on compatible iPhones • Optional smart notifications and alerts Detailed Alcohol Estimate See how the estimate changes over time, including: • Estimated BAC • Alcohol absorbed • Alcohol processed • Net change • Drinks added in each period • Current risk status Safety-First Calculations • Conservative assumptions • Upper drink strength used for ranges • Food slows absorption timing rather than reducing alcohol • Designed to avoid false reassurance Profiles & Multiple People • Optional personal profile setup • Gender and build selection • Advanced profile options • Track more than one person • Country-specific driving limits Country & Regional Driving Limits Includes support for: • United States (general reference — state laws can vary) • UK, including Scotland's lower limit • Europe / EEA • Switzerland • Norway • Canada • New Zealand • South Africa • Japan • Hong Kong DESIGNED FOR REAL LIFE • Fast to use • Native iOS design • iPhone and iPad support • Apple Watch support • Dark Mode support • Clear, detailed estimates • Safety-first approach IMPORTANT DISCLAIMER Drive Sober provides estimates only. It is not a breathalyzer and cannot determine legal or medical fitness to drive. Alcohol affects people differently, and no app can tell you that it is safe to drive. If you have been drinking, the safest option is not to drive.

Permille keeps track of what you drink — and how it affects you. Use it for alcohol only, for caffeine only, or for both. It follows your lead: drink coffee in the morning and you see the caffeine reading. Go out at night and you see your blood-alcohol level. Do both and you see both, side by side. ALCOHOL IN VIEW • Blood-alcohol estimate using the Widmark formula — with a traffic-light status and estimated time back to 0.0 ‰. • The value rises gradually while you drink and comes down naturally — across midnight, too. • Water guidance: alcohol is dehydrating — the app shows how much water still helps and gently reminds you. • When it gets heavy, you get tips for getting home safely. CAFFEINE IN VIEW • How much caffeine is in you right now — calculated from its half-life, not just added up. • The answer that matters: when you can fall asleep well again, and when it has fully worn off. • A heads-up when you go past the 400 mg daily guideline. • Coffee, espresso, cappuccino, latte, cold brew, matcha, tea, cola, mate and the common energy drinks in the usual sizes — each with and without sugar. BOTH TOGETHER • Vodka Energy or an Espresso Martini? The app works out alcohol and caffeine separately from the same drink. • Worth knowing: caffeine masks tiredness, not the alcohol. The app says so whenever both are in play. • A coffee never counts as alcohol — your dry days and stamp card stay untouched. ALSO INSIDE • Daily totals: alcohol, caffeine, sugar, calories and cost. • Mixer: build your own drinks from an ingredient library and see every value live. • History & stats: your evening's curve, weekly and monthly figures, spending and patterns. • Optional breathalyzer cross-check, Apple Health sync and Home/Lock-Screen widgets. OUT TOGETHER • Friends round with a six-character code: see each other's drinks, estimated blood alcohol and water. • “Look after …”: a heads-up when someone is estimated to have drunk a lot or quickly. • “I'm home” – your round sees a house next to your name. • Several rounds at once, and after the trip a recap stays on your iPhone. MINDFUL, NOT ENCOURAGING Permille is built for harm reduction: water, breaks and nutrition transparency come first. YOUR DATA STAYS WITH YOU Your entries are stored on your iPhone. Only if you join a friends round do you share your status with it via iCloud – and only while you're in it. Members keep a recap of the round on their iPhone afterwards. No account, no ads. Anonymous usage statistics (can be turned off) help improve the app. IMPORTANT Blood-alcohol and caffeine values are rough estimates, NOT a measuring device. Use at your own risk, without warranty. Never use it as a basis for driving — 0.0 ‰ always applies behind the wheel. It does not replace medical advice. For adults only. Excessive alcohol consumption harms your health.