Privacy
DrawTrainer has no accounts, no sign-up and no advertising. It does not know who you are, and it is not built to find out.
Your practice history stays on your device
Every drill attempt, session, record and trophy is stored in your own browser, using its local storage. It is never uploaded, and nobody else can read it — not even me.
The flip side is that it is only as safe as this browser. Clearing your site data erases it, and it does not follow you to another device or another browser. There is no copy anywhere to restore from.
What DrawTrainer sends
To learn whether the app is any good, it sends two small anonymous messages per visit and no more: one when the app opens, and one summary when you leave. Nothing is sent while you practise, however long you stay or how much you draw. Between them they contain:
- counts for the visit — how many attempts were scored, how many sessions finished, how many different drills you tried, how many trophies were earned, and how long the visit lasted
- your average score for the visit, and which drill you did most. One average, never the individual attempts behind it — I can see that a visit averaged 68, not what any single stroke scored
- roughly how much this browser has practised: a range for how many sessions it has done, and a range for how long ago the first one was. Ranges, never the exact figures — an exact number would be rare enough to pick you out
- the page address within this site, the site you arrived from, and your browser’s language setting
The server that receives these also records the time and your browser’s user-agent string, which describes the browser and operating system version.
What it never sends
- Your name, email address or any contact detail — it never asks for one.
- Anything you draw. Strokes are scored in your browser; only the resulting numbers are sent.
- Your individual scores. No attempt, session or trophy is described one by one — only the counts above leave your device.
- Any identifier. No cookies. No advertising or tracking identifiers. Nothing is stored on your device for statistics, so two messages from you cannot be told apart from two messages by two different people.
That last point is the deliberate design of this app. It means I can see that somebody sat down and practised, but not that it was you, and not which visits were yours.
Where it goes, and for how long
The messages go to my own server in Stockholm, Sweden, and from there to a computer in my home. No analytics company is involved and nothing is sold, shared or used for advertising. The data is automatically deleted from the server after 90 days; I keep the anonymous counts for longer to compare one month against another.
Switching it off
If you would rather not send usage statistics, you can switch them off here. The app works the same either way.
Checking your current setting…
If this changes
DrawTrainer may later offer an optional paid account that backs up your practice history. That would mean storing data about people who sign up, and this page will be rewritten before any of it is built. Nothing described above changes without this page changing first.
Questions
Anything about this page, or about what DrawTrainer stores, goes to drawtrainer.app@gmail.com.