WZ Vault › Writing

Working numbers, not opinions

Every piece here has the arithmetic in it: what the work pays per hour, what a product actually nets after advertising, and which tools earn the subscription. If a number is a worked example rather than a promise, it says so.

Honest take

Which subscriptions should you actually cancel?

Not the expensive ones. The audit takes twenty minutes, works from your bank statement rather than your memory, and the first pass usually removes three.

2026-10-31 · 4 min

Honest take

Build it, buy it, or skip it?

Three questions settle almost every tool decision, and the answer is 'skip' more often than any comparison article can tell you — including the ones here.

2026-10-30 · 4 min

Building

When should you stop asking and read the code?

Two failed attempts at the same fix is the signal. After that you are not debugging, you are sampling — and the sampling gets more expensive every round.

2026-10-29 · 4 min

Building

What is your app really storing?

Data you do not use is not an asset, it is a liability with a retention period. Four questions that usually delete half a schema, and the one that catches logs.

2026-10-28 · 4 min

Building

Which switches are still on when you launch?

The demo account, the seeded data, the debug route and the permissive setting you added at 1am to make something work. A checklist of seven, all found after launch.

2026-10-27 · 4 min

Building

What can a stranger read from your app?

Not what you decided to show them. Predictable ids, endpoints nobody linked, and a login that only hides the button — the three that catch people who ship alone.

2026-10-26 · 4 min

Production

One idea, three formats: where repurposing breaks

The same point as a short, a long video and an article is not three posts — it is one argument at three depths. Mix that up and all three read as filler.

2026-10-25 · 4 min

Production

What do captions actually cost you per video?

Automatic transcription is 95% right, and the 5% is always the same five things: brand names, numbers with units, the language, and where a sentence ends.

2026-10-24 · 4 min

Production

How do you make thumbnails without a designer?

29 thumbnails from one template, each generated from the video's own data. Three things decide the click, and none of them is how good the image looks.

2026-10-23 · 4 min

Production

Can you edit video without a monthly subscription?

29 videos, 142 minutes, rendered from code with no editing software involved. What that costs in licences, and the three days nobody mentions.

2026-10-22 · 4 min

Production

What does an AI voiceover actually cost per video?

142 minutes of narration in a month. On hosted tiers that is the $99 plan; on a model running locally it is nothing. The difference is not clarity.

2026-10-21 · 4 min

Honest take

What does a launch with no audience look like?

42 articles, 10 products, 116 videos, 5,844 views and zero sales. The starting numbers, written down before the result rather than after it.

2026-10-20 · 4 min

Selling

One-off or subscription for a business of one?

A subscription is not a price change, it is a promise to keep working. The question is not which earns more — it is which obligation you can actually carry.

2026-10-19 · 4 min

Selling

Why your first product probably will not sell

Ten products live, zero sales. That is not a verdict on the products — it is a diagnosis you can run in order, and almost everyone runs it backwards.

2026-10-18 · 4 min

Selling

Bundle or single: when does a bundle make sense?

Eight books at €20 and two packs at €9 is €178. The bundle is €50. Here is when that arithmetic builds a business and when it quietly destroys one.

2026-10-17 · 4 min

Selling

How do you price something with no sales yet?

Cost-plus does not work when the marginal cost is zero. Three anchors that do, and why the first number you pick is almost never the last one.

2026-10-16 · 4 min

Being found

Which structured data actually gets used?

FAQ rich results were limited to government and health sites in 2023. This site has FAQ markup on 114 pages. What that is still worth, and what it is not.

2026-10-15 · 4 min

Being found

Does llms.txt do anything yet?

Google ignores the file. Anthropic recommends one and ships its own. Both are true: they are talking about different audiences, and only one of them is search.

2026-10-14 · 4 min

Being found

How do you get cited by AI answers?

Google says there is no special technique — it is still SEO. What does differ: which crawlers you allow, and that blocking training is not blocking citation.

2026-10-13 · 5 min

Measuring

How do you know if a video or article did anything?

Attribution without a budget, when your analytics cannot see campaign tags. Referrer, landing page and timing get you most of the way — and the rest is asking.

2026-10-12 · 4 min

Measuring

The five numbers worth checking every week

Most dashboards show twenty. Four of them move on their own and tell you nothing. Here are the five that change what you do next, and when to look.

2026-10-11 · 4 min

Measuring

Plausible, Umami or Vercel Analytics: which do you need?

The three free tiers count different things, so the numbers are not comparable. And the one already built into your host cannot track a form submission at all.

2026-10-10 · 5 min

Building

Where are your keys, and who can read them?

A one-person business has the same secrets as a company and none of the process. The five places a key leaks, and the ten minutes that close four of them.

2026-10-09 · 4 min

Selling

Must you refund a digital product once downloaded?

Not if three specific conditions were met at the checkout — and the courts read them strictly. Also: a refund costs €0.55 and a chargeback costs €20.

2026-10-08 · 5 min

Foundations

Transactional email or a newsletter tool: which first?

They look like the same product and they are not. The 100-a-day free cap and the 10,000-subscriber free tier explain most of the confusion.

2026-10-07 · 4 min

Foundations

Free hosting until it is not: where the cliff actually is

The free tier does not send you a bill when you cross it — it stops. And if you are selling anything, you are on the wrong plan already.

2026-10-06 · 4 min

Foundations

What a domain actually costs over five years

A .io looks like a reasonable first-year purchase and costs four times a .com by year five. The renewal price is the price — the first year is marketing.

2026-10-05 · 5 min

Selling

What VAT do you charge on a digital product in the EU?

Your own country's rate until €10,000 of cross-border sales, the buyer's rate after. The threshold is EU-wide and cumulative — that is the part people miss.

2026-10-04 · 5 min

Selling

Shopify or your own checkout: where it actually flips

For digital products the fees never favour Shopify — the gap is €21 to €40 a month at any volume. Which is why fees are the wrong thing to decide this on.

2026-10-03 · 5 min

Selling

What taking your first payment online actually costs

A €20 sale does not leave you €20. VAT, the card rate and one chargeback, worked out on real Stripe pricing — and the card type that quietly doubles the fee.

2026-10-02 · 7 min

Alternatives

3D models without learning Blender

Text-to-3D gives you a usable mesh in minutes and a production-ready asset almost never. Which one you need decides everything.

2026-09-23 · 5 min

Alternatives

AI slide makers, and when Canva is still the answer

Generated decks get you a structure in a minute and a house style never. Which half of the job you are stuck on decides the tool.

2026-09-23 · 4 min

Alternatives

AliExpress alternatives for sourcing a product

Switching platform fixes shipping time and nothing else. If the arithmetic did not work before, a different supplier does not rescue it.

2026-09-23 · 5 min

Alternatives

Bubble alternatives: describe it, or build it

People leave a no-code builder for two reasons: the learning curve, or the bill. Those point at completely different tools.

2026-09-23 · 5 min

Alternatives

ChatGPT Plus alternatives, and when to keep it

Four routes if €20 a month for one model stops making sense — including the one where the honest answer is that you are already on the right plan.

2026-09-23 · 5 min

Costs

The cheapest way to use Claude, GPT and Gemini together

Most people need one subscription, not three. The three routes compared, and why the savings on an aggregator's own pricing page are nonsense.

2026-09-23 · 4 min

Costs

Which AI tools are actually free, and where the catch is

39 of 67 tools here are usable without paying and 20 earn me nothing. Free means three different things, and the third one bites once you earn.

2026-09-23 · 5 min

Working with agents

How to brief an AI agent once, instead of every message

Put your rules in a file the agent reads every session instead of retyping them. Four categories, and the one line that changes what you get back.

2026-09-23 · 5 min

Selling

Reselling with no money: why month one pays worst

Start with what you already own. Month one pays about €9 an hour — and three changes roughly triple that on the same hours.

2026-09-23 · 5 min

Selling

Is affiliate marketing dead now AI answers the question?

No, but the payout moved. Sites that rented rankings are losing; sources a model cites are not. What the surviving half needs.

2026-09-23 · 6 min

Working with agents

Is your AI-written app safe to put online?

Seven checks before real people use it, each testable in minutes — and the point where you should stop and pay somebody.

2026-09-23 · 5 min

Alternatives

Otter.ai alternatives, by what you do with the words

Meeting notes, subtitles and video editing are three different jobs. Pick the tool for the job first, then compare cost per hour — not the other way round.

2026-09-23 · 4 min

Selling

Recurring affiliate income, and why most of it is not

Almost every programme pays once. The few that pay on every renewal are worth more than a higher percentage, and the arithmetic is not close.

2026-09-23 · 5 min

Alternatives

Runway alternatives, by what the clip has to do

Character consistency, localised product video and bulk generation are three different problems. The tool that leads one is rarely the one that leads another.

2026-09-23 · 6 min

Selling

How to sell a digital product without a platform

Stripe, a file store the public cannot reach, and one email. The hard part is not the code — it is VAT and the EU right to cancel.

2026-09-23 · 6 min

Working with agents

How to stop an AI agent breaking code that already worked

Bound the scope before it starts, demand proof instead of a description, and keep one working version. The model is not the problem.

2026-09-23 · 5 min

Costs

What an hour of transcription actually costs, compared

Real plan prices turned into a cost per hour, with the break-even points — including one tool where the pricier plan costs more per hour.

2026-09-23 · 5 min

Costs

What AI tools actually cost per month

About €21 a month at the floor, €120 once you publish video. Every line priced, and the three subscriptions people stack by accident.

2026-09-23 · 5 min

Costs

What a finished AI video clip actually costs

The price per generation is not the price of a usable clip. How to work out your real cost, and which tool suits which job.

2026-09-23 · 5 min

Explained

What is an AI coding agent, and how is it different?

An agent reads, edits and runs files by itself; a chat window hands you code to paste. That difference decides cost, capability and risk.

2026-09-23 · 5 min

Explained

What is MCP, and do you actually need it?

A standard way for an assistant to reach your files, database or tools. You need it later than people say — and the security part is skipped.

2026-09-23 · 5 min

Explained

What is vibe coding, and where does it leak?

Building software by describing it. It works better than expected and fails in the same three places: access rules, secrets, unchecked input.

2026-09-23 · 6 min

Publishing

What running an AI persona actually involves

Making the images is the easy part. The work is consistency, disclosure rules applicable in the EU since August 2026, and payment processors.

2026-09-23 · 5 min

Alternatives

Zapier alternatives that cost less

Four routes out of a Zapier bill, ranked by what they actually replace. I use three of them and none of those three pay me anything.

2026-09-23 · 5 min

Research

What AI coding agents get wrong, measured

Generated code runs more than 95% of the time and passes security checks about 55%. Three measured failure modes, and how to catch each one.

2026-09-22 · 5 min

The stack

The AI tool stack for a one-person business

The tools a one-person business actually needs, what each costs, and the ones you can skip until something is genuinely stopping you.

2026-09-20 · 5 min

Worked numbers

Dropshipping unit economics in 2026: the €69 worked example

A €69 product, worked through line by line: what you keep after costs, and why cold advertising makes more sales lose more money.

2026-09-20 · 8 min

Ranking

The real hourly rate of 8 AI side hustles

Eight AI side hustles ranked by what they actually pay per hour, with the worked example behind each number.

2026-09-20 · 7 min

The Short Version

Every conclusion from all eight playbooks — 97 chapters, condensed. Free.

PDF to your inbox, then three short emails on where to start. Reply “stop” to end them.

The tool list

All 67 tools →RSS