Answer
An HTML APK is as safe as its content and its permissions. The WebView runs your page in Android's sandbox like any app; a typical HTML app needs only internet access. Risks come from what the app loads and asks for: unnecessary permissions, remote scripts you do not control, and secrets left in the HTML, which anyone can read by unzipping the APK.
For people installing one
- Install APKs only from sources you trust, such as the developer's own website.
- Check the permissions: a calculator has no reason to ask for contacts or SMS.
- Keep Google Play Protect on — its warnings explained.
For developers
- Never put API keys, passwords or private data in the HTML.
- Bundle libraries instead of loading scripts from third-party CDNs you do not control.
- Switch on only the permissions your pages use.
- Use https for every network request.
- Keep your signing key safe — whoever has it can publish updates as you.
Frequently asked questions
Can an HTML app access my files or contacts?
Not on its own. A WebView page can only reach device features the app declares and the user grants, such as camera or location, through standard web APIs.