Guides & explainers
The reasoning behind the tools. How percentages actually work, what a loan really costs, why BMI misleads, and how to pick a password that holds up. Written to answer the question, then get out of the way.
Money How to Settle Up After a Group Trip Without Falling Out
The arithmetic is simple. The arguments come from splitting things evenly that were not shared evenly, and from leaving it too long.
Money The Expensive Thing Is Often the Cheap One
Price is what you pay once. Cost is what you pay per use. The two frequently point in opposite directions, and only one of them matters.
Money What Overtime Is Actually Worth
The multiplier applies to the whole hour, entitlement depends on your contract rather than staying late, and it is not taxed at a special rate.
Money Why a 30% Return Might Be a Bad One
A total return without a time period is close to meaningless. The same 30% is excellent over a year and below inflation over ten.
Guides Why Your Broadband Is Slower Than You Paid For
Most of the gap is one unit conversion. Connections are sold in megabits and files are measured in megabytes, and there are eight bits in a byte.
Health You Probably Should Not Test Your One Rep Max
A true max attempt is high risk, disruptive and rarely necessary. An estimate from a hard set of five is safer and good enough for programming.
Security How to Redact Something So It Stays Redacted
Black boxes in PDFs and documents are famously recoverable. Pixelated text has been brute-forced. Here's what actually removes information.
Health Why Most People Train in the Wrong Zone
Zone 3 feels productive and builds neither endurance nor speed. The 80/20 pattern, why 220-minus-age is weak, and what each zone is actually for.
Home Which Appliances Actually Cost You Money
Unplugging chargers saves about £2 a year. The tumble dryer costs £130. Here's where household electricity actually goes, with the arithmetic.
Security What Your Browser Tells Every Site You Visit
Fingerprinting identifies you without cookies, survives private browsing, and can't be cleared. Here's what's exposed, and why hardening often backfires.
Security What Your Photos Give Away When You Share Them
Every phone photo can carry the exact coordinates where it was taken. Here's what's inside the file, who strips it, and how to check before you post.
Guides How to Write So People Actually Read It
Long sentences are the single biggest cause of unreadable writing. Here's what readability scores measure, what they miss, and the five fixes that work.
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