Free · No sign-up · Research-backed

Tools that give you a reality check

Seven honest calculators covering your health, money, time and habits. Built on peer-reviewed research. No fluff, no sign-up — just the numbers.

🛠️ 7 free tools 📚 Research-backed ⚡ Instant results 🔒 No data stored
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Health · Longevity
What's Your Lifestyle Costing You?
Enter your habits — alcohol, smoking, exercise, sleep, stress, BMI, diet — and see how many years you're adding or losing. Backed by The Lancet, BMJ and NEJM.
"I had no idea my sitting habits were shaving years off my life."
Alcohol Smoking Exercise BMI
Take the check→
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Money · Habits
What's Your Coffee Habit Really Costing You?
That daily latte feels small. Over 10 years, invested in the S&P 500, it's a very different story. Enter your drinks and see the true cost.
"$5 a day is $73,000 over 20 years if invested. I needed to see that."
Coffee Iced drinks Investment growth
Calculate the cost→
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Money · Career
Does Your Salary Actually Cover Your Life?
Enter your salary and real monthly costs. See your savings rate, monthly surplus or shortfall, and how far your salary would go in 20 cities across the US, UK and Europe.
"Turns out I'd be significantly better off financially in Lisbon than London."
US cities UK cities Europe
Check your salary→
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Productivity · Work
What Are Your Meetings Actually Costing?
A 6-person, 1-hour meeting at average salaries costs ~$230. Enter your weekly meeting load and see the real price — in money, focus time lost and deep work destroyed.
"My team's weekly meetings cost $4,800 a week. Nobody had ever said it out loud."
Cost per meeting Deep work lost Annual cost
Calculate the cost→
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Productivity · Habits
What Is Social Media Really Costing You?
Still scrolling? Enter your daily time on TikTok, Instagram, X, Reddit and more. See how many days of your life it adds up to — and what you could have done instead.
"2 hours a day is 30 full days a year. I could have learned a language."
Time lost Economic cost What you could achieve
Face the numbers→
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Health · Daily habits
Are You Actually Hydrated?
Most people are mildly dehydrated by mid-afternoon and don't realise it. Enter your weight, activity, climate, caffeine, alcohol and diet for a personalised target and dehydration check.
"I was 60% below my target and wondering why I had a headache all afternoon."
Personalised target Dehydration level Drink schedule
Check hydration→
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Health · Recovery
How Much Sleep Are You Actually Getting?
Log your week of sleep, add quality factors — alcohol, screens, caffeine, stress — and see your real sleep debt, its cognitive impact, and exactly how long recovery will take.
"Turns out 7 hours with a glass of wine and an hour of Netflix is actually closer to 5."
Sleep debt Cognitive impact Recovery plan
Check your sleep→

A reality check is a good thing

That's what I tell my sons when I want them to have an honest conversation. It's also what every tool on this site is designed to do — not to alarm you, but to give you the numbers you probably haven't stopped to look at.

All tools are free, require no sign-up, store no data, and are built on peer-reviewed research. New tools added regularly.

Built with ♥ and Claude (Anthropic) — because ideas matter more than implementation.