
How Accurate Is a GPS Speedometer? (And Why Your Car Reads High)
Your car’s speedometer is allowed to read high and never low — by law. Here’s how GPS speed actually works, how accurate it is, and when to trust which number.
Practical guides for our apps and tools, and honest writing about building mobile software as a small indie studio.

Your car’s speedometer is allowed to read high and never low — by law. Here’s how GPS speed actually works, how accurate it is, and when to trust which number.

Three ways to sign a PDF on an Android phone — no printer, no scanner, no account. What works, what watermarks your document, and how to keep it private.

Where the gigabytes really hide on a Mac — System Data, Xcode caches, node_modules, old simulators — and how to clear them without breaking anything.

What an indie app studio actually is, how the portfolio model works, and what we’ve learned shipping 36 apps, games and tools as a small team.

One phone, zero equipment: the best mobile party games for groups, couples and icebreakers — from Never Have I Ever to Party Roulette — and when to play each.