Promil Meter vs SleepShift
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Promil Meter
Calculate your blood alcohol content (BAC) in real-time using a scientific formula. Track your alcohol consumption, get estimated sober-up times, and receive driving warnings for responsible drinking.
- Real-time BAC calculation
- Estimated time to sober up
- Driving warnings
- Multi-profile support
- Custom alcohol types
- Consumption history and statistics
- Offline functionality
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Promil Meter is your smart companion for responsible drinking. Calculate your blood alcohol content (BAC) in real time using the scientifically proven Widmark formula and track your alcohol consumption with precision. Scientific Accuracy • Real-time BAC calculation with the Widmark formula • Personalized results based on weight, gender, and age • Estimated time to sober up • Professional-grade alcohol tracking Smart Features • Multi-profile support • Add your own alcohol types • Detailed consumption history and statistics • Color-coded BAC level warnings • Countdown timer to sober Safety First • Real-time driving warnings • Personalized safety recommendations • BAC level notifications • Responsible drinking guidelines User-Friendly Design • Clean and intuitive interface • Dark/light theme support • Fully offline functionality • Privacy-focused local data storage Comprehensive Alcohol Database • Preloaded popular drinks (beer, wine, whiskey, vodka, gin, tequila, rum, raki) • Create your own alcohol types • Precise alcohol percentage tracking • Standard drink size calculations Advanced Analytics • Daily, weekly, and monthly consumption reports • BAC trend analysis • Personal drinking patterns • Health insights Privacy and Security • All data is stored on your device • Your personal information is never shared • Works completely offline • Secure SQLite database Key Benefits • Make informed decisions about driving • Track your alcohol consumption habits • Understand your body's alcohol metabolism • Promote responsible drinking habits • Stay safe and legal This app is ideal for anyone who wants to drink responsibly, track their alcohol consumption, or understand their BAC levels. Take control with Promil Meter! Important Notice This application is for informational purposes only. BAC calculations are estimates and do not replace professional medical advice. Never drive under the influence. Always drink responsibly and follow local laws. Download Promil Meter now and track your alcohol consumption with scientific accuracy!
SleepShift
This app helps shift workers optimize their sleep by calculating personalized sleep windows based on their unique schedules. It offers guidance on light exposure, caffeine, and naps, with features like lock screen widgets and Apple Health integration.
- Personalized optimal sleep windows
- Home and lock screen widgets
- Live Activity for Dynamic Island
- Light exposure guidance
- Caffeine and melatonin timing
- Pre-shift nap recommendations
- Apple Health integration
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Finally, a sleep app built for shift workers. Regular sleep apps assume you sleep at night. SleepShift doesn't. Whether you work nights, evenings, or rotating shifts — SleepShift calculates your optimal sleep window based on YOUR actual schedule. HOW IT WORKS: 1. Enter your shift pattern (day, evening, night, or custom hours) 2. Set your rotation (e.g., 4 days on, 4 days off) 3. Get personalized sleep recommendations every day WHAT YOU GET: - Optimal sleep windows calculated for each shift - Home screen and lock screen widgets — your next wind-down, bedtime and wake time at a glance - A Live Activity that follows your window on the lock screen and Dynamic Island - Light exposure guide — when to seek or avoid bright light - Wind-down and bedtime reminders, scheduled days ahead - Caffeine cutoff and melatonin timing - Pre-shift nap recommendations for night workers - Sleep imported automatically from Apple Health — rate a night with one tap - Trends across your shifts, with plain-language insights - Edit any single day: swap a shift, take one off, pick up an extra BUILT FOR: - Nurses and healthcare workers - Factory and warehouse workers - Pilots and flight attendants - Police and emergency responders - Truck drivers - Anyone working non-traditional hours THE SCIENCE: SleepShift uses circadian rhythm research to calculate when your body is best prepared for sleep based on your shift end time. Night shift workers get specific guidance on light avoidance, sunglasses timing, and room darkening. Rotating shift workers get transition-day plans when switching between day and night shifts. And because no real roster is a perfect rotation, you can change any single day without touching your pattern. WHY SLEEPSHIFT: - Zero apps are designed specifically for shift workers - 25 million Americans do shift work - Poor shift-work sleep is linked to serious health risks - We help you sleep better, feel better, and stay healthier Try free for 14 days. Plans start at $2.92/month (billed annually). Privacy Policy: https://yucelcelik.github.io/sleepshift-website/privacy-policy.html Terms of Use: https://yucelcelik.github.io/sleepshift-website/terms-of-service.html
Screenshots
Verdict
The clearest difference is review sentiment: SleepShift at 100% against Promil Meter's 50%. Promil Meter's advantage is in-app purchases (none vs 2) and update cadence (weekly vs every 3 months). On price and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. SleepShift sells 2 in-app purchases, starting at $5.99 per month. Promil Meter asks for nothing beyond the download.
Promil Meter ships an update weekly, SleepShift every 3 months. The most recent releases landed on September 30, 2026 and September 25, 2026 respectively.
| Parameter | Promil Meter | SleepShift |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | — | 1 — better |
| Update frequency | Weekly — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 12.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 35 MB | 7 MB |
| Age rating | 17+ | 4+ |
| Developer | Ali Can Olgen | YUECEL CELIK |
Customer experience
Promil Meter
SleepShift
In-app purchases
Promil Meter
No in-app purchases
SleepShift
- SleepShift Pro14 Days trial$5.991 Month
- Pro Annual14 Days trial$34.991 Year









