Do you even need to update?
Here is the pleasant secret of wrapper apps: most improvements need no update at all. Because the KhoindVN APK displays the live khoindvn.io.vn site, new articles, design tweaks, and fixes on the site reach you instantly, with the installed app untouched. An APK update only matters when the wrapper itself changes.
Check your installed version
Long-press the KhoindVN icon, tap App info, and look at the version at the bottom. If it matches the version on our download page, you are current and there is nothing to do. The current release is v1.0.
Install the new build over the old
When a new version appears, download it from the official download page and install it exactly like the first time; our install guide covers the screens. Android installs it over the existing copy: your home-screen icon stays where it is, and there is nothing to reconfigure.
Do not uninstall first unless the installer complains about a signature conflict, which should not happen between our own consecutive releases.
What updates can change
Wrapper updates are usually small: a newer target Android version, a tweaked icon, a fix for an edge-case device. We document what changed on the download page with each release, and we re-run the full test pass, real phones, clean installs, before the new button goes live. The method is the same one on our How We Review page.
If an update ever misbehaves, the install fixes apply equally; an update is just an install that found a previous copy.