BLOCKSMITHPrivacy policy
Last updated 16 October 2026
The short version. Blocksmith runs on your own computer. Skins, packs, builds, worlds, pictures and songs are all made there. What leaves your computer: a check that your plan is active each time the app opens, and your AI wishes (for players 13 and up). There is no account, no chat, no advertising in the app and no tracking cookies on this site. Players under 13 get AI wishes switched off, so only the plan check is sent.
Who we are
Blocksmith (“we”, “us”) is the data controller for the information below. Write to hello@blocksmithapp.com about anything in this policy. A person reads it.
Age
The first time Blocksmith opens, it asks for the year you were born. It keeps only the answer “13 or over” or “under 13”, on your computer, and never sends it to us. If the answer is under 13, AI wishes are switched off and the only thing the app sends is the plan check described below. Blocksmith is not directed at children under 13 and we do not knowingly collect personal information from them. If you think a child under 13 has sent us something, write to us and we will delete it.
What stays on your computer
Everything you make, the pictures and MIDI files you add, your settings, the folder Minecraft is in, and your Blocksmith code. Pictures you turn into pixel art and songs you turn into note block machines are processed on your computer and never sent to us. Delete the Blocksmith folder and it's all gone.
The plan check
Blocksmith is a paid app. Each time it opens, and every 15 minutes while it runs, it sends our server your Blocksmith code and a random name for your copy of the app, and our server answers whether the plan is active. We use this only to run the subscription and stop codes being shared beyond a household.
AI wishes (13 and up)
When you make something with an AI wish, the app sends our server: the wish you typed (at most 120 characters), what kind of thing it is, a random name for your copy of the app, and your Blocksmith code. If you choose Build it in 3D with a picture, a smaller copy of that picture is sent too. Our server passes the wish (and picture) to Anthropic, whose AI, Claude, writes a small recipe of colours and shapes. That recipe is checked against a fixed list before anything is drawn. Anthropic handles it under its own commercial terms and does not use it to train its models.
We do not keep your wish or your picture. What our server keeps:
| What | Why | How long |
|---|---|---|
| One line per AI wish: the time, what kind of thing, whether it worked, your copy's random name, your Blocksmith code, and the internet (IP) address it came from | To count each plan's wishes, stop abuse, and find faults | 90 days |
| Download counts by where visitors came from (for example “tiktok”) — numbers only, nothing about you | To know which adverts work | Kept as totals |
The random name and IP address are used only to run the service and prevent abuse (our legitimate interest), never for advertising or profiling.
Buying Blocksmith
Blocksmith is bought by an adult (18+) through Stripe's checkout. The sale is made through Link, Stripe's checkout, which acts as the reseller and merchant of record: it takes the payment, adds any sales tax, VAT or GST, and sends your receipts, under its own privacy policy. You type your card into Stripe's page; we never see it. Stripe tells us your email address and identifiers for your customer and subscription. We keep those with your Blocksmith code and how many wishes you have used this month, for as long as you subscribe and 12 months after (longer where tax law needs it). Your code is also printed on your receipts.
This website
This site sets no cookies and loads nothing from third parties; the typeface is served from here. When you click a download button the site sends one anonymous count to our server, saying which download and, if you arrived from an advert, which one — nothing that identifies you. Our host, Netlify, keeps ordinary server logs for security. If you use the contact form, your email address and message come to us so we can reply, and are deleted within 12 months.
Who we share with
Only the services that run Blocksmith for us: Anthropic (AI wishes), Stripe and Link (payments, tax and receipts), Railway (hosts our server and its database) and Netlify (hosts this website and the contact form). We do not sell data and we do not share it for advertising.
Laws we follow
Blocksmith is run from Canada and follows Canada's Personal Information Protection and Electronic Documents Act (PIPEDA), the GDPR for people in the UK and EU, and the US Children's Online Privacy Protection Act (COPPA) — which is why, for players under 13, AI wishes are off and the only thing sent is the plan check, used solely to run the service.
Your rights
You can ask for a copy of what we hold about you, have it corrected or deleted, take it elsewhere, or object to how we use it. Email hello@blocksmithapp.com and we will answer within a month. If you are unhappy with our answer you can complain to the Office of the Privacy Commissioner of Canada (priv.gc.ca), or your local data protection authority.
Changes
If this policy changes we will change the date at the top, and tell subscribers by email about anything important.