Blog

Plain-English writing about the problems each Help Toolz tool solves. Cross-linked back to the tool that does the actual work.

All 18 posts

  1. Predicate search is the hardest part of medical device development

    95%+ of US medical devices clear via 510(k). That requires finding a "substantially equivalent" predicate. The openFDA database has the answer; the search UX hides it.

    2026-05-12 · 6 min read
  2. Why your AWS bill is 3x your estimate

    The AWS pricing calculator asks for 50 inputs and gives you a number. Your real bill arrives 3x higher because it ignores the architecture-level costs that dominate.

    2026-05-11 · 6 min read
  3. The carbon offset market is mostly broken — here's how to read it

    A "1 ton of CO2 offset" is whatever the offset retailer says it is, not what was avoided. After the 2023 REDD+ scandals, the offset market's credibility problem is now public.

    2026-05-10 · 7 min read
  4. What it actually costs to electrify your home heating

    The 2022 Inflation Reduction Act changed the heat pump math. Federal Section 25C/25D credits + the income-tested HEEHRA rebate can stack — but only if you understand which apply.

    2026-05-09 · 6 min read
  5. Your contractor hourly rate is not salary ÷ 2080

    Naive calculators divide salary by 2080. They miss self-employment tax (15.3%), the benefits gap, and the fact that no contractor bills 100% of their working hours.

    2026-05-08 · 6 min read
  6. Why regex tools are stuck in 2010

    regex101 is dense. Debuggex had the right idea and stopped being maintained. There's an obvious gap in the market for regex tooling.

    2026-05-07 · 4 min read
  7. Break-even is not profitability

    Hitting break-even units this month doesn't mean you're profitable. It means you covered your fixed costs. Working capital, owner pay, and growth all need separate budgets.

    2026-05-06 · 5 min read
  8. Tipping: five patterns explain 80 countries

    Tipping cultures fall into five rough categories. Once you know which one you're in, you don't need to memorize country-by-country rules.

    2026-05-05 · 5 min read
  9. Starting a business: the real cost by state

    LegalZoom-style services tell you formation is cheap. They are technically right and practically wrong. Here's where the real budget goes.

    2026-05-04 · 6 min read
  10. The 20-year math of a US patent

    Filing fees are less than 5% of what a patent actually costs you. Here's the full 20-year math — and the maintenance-fee deadlines that decide what survives.

    2026-05-03 · 6 min read
  11. Cap rates aren't risk metrics. They're price signals.

    A cap rate is what the market is willing to pay for income today, not what risk you're taking on. The difference matters when you're underwriting a deal.

    2026-05-02 · 7 min read
  12. Marketplace fees eat more of your sale than you think

    A walk-through of how marketplace fees stack — including the fees most blog calculators silently omit. Plus what to do about it.

    2026-05-01 · 6 min read
  13. Not feet to meters: the engineering unit conversion edge cases

    There are three definitions of horsepower in active use. Viscosity has at least three measurement systems. Radiation dose distinguishes absorbed, equivalent, and activity. Most converters handle none of these.

    2026-04-30 · 5 min read
  14. Why Mendeley and Zotero butcher Japanese author names

    Mendeley re-renders "Tanaka Hiroshi" as "Hiroshi Tanaka, T." That's wrong. Family-first naming is the convention across China, Japan, Korea, and Vietnam. Most citation tools don't handle it.

    2026-04-28 · 5 min read
  15. Contrast checking one pair at a time misses the point

    WCAG calculators ask for one foreground + one background. Real palettes have 10 colors and 100 pairings. Most accessibility failures happen at pairings nobody tested.

    2026-04-26 · 5 min read
  16. Cron syntax was not designed for humans

    Cron predates email. The syntax shows it. Five fields, weird operators, no preview. Plain English to cron is the missing piece every scheduling tool skips.

    2026-04-24 · 4 min read
  17. Finding meeting time across distributed teams without the spreadsheet

    With 2 people, scheduling is easy. With 6 across 4 time zones, "when does everyone overlap?" becomes a real constraint satisfaction problem.

    2026-04-22 · 5 min read
  18. Time zones are harder than they look

    "What time is it in Tokyo?" sounds simple. It isn't. Most world-clock tools answer the wrong question, and DST + IANA changes make it worse.

    2026-04-20 · 5 min read