Flex Maintenance is part of the FLEX plugin suite from FLEX LLC (https://flexible.am/). It puts a public splash in front of the website while you build or repair it. Login and wp-admin stay available. Logged-in administrators always see the real site. Use Preview splash to check the design.

Coming soon, under construction, or maintenance page types
Optional start and end schedule in the site timezone
Countdown when a future time is set
Bypass by extra roles, secret link, IP allowlist, or public paths
Three local templates (centered, split, minimal), logo, background, accent, and social links
Preview from admin and an admin-bar badge when the splash is on
Block bots and crawlers while the splash is on (Recommended, on by default)
Purges Flex Cache when the splash turns on or off

Admin CSS and JavaScript ship with the plugin. The public page does not load Tailwind, Google Fonts, or any other remote stylesheet. No remote calls. No telemetry.

Privacy

Flex Maintenance does not log visitors, IPs, or user agents. It does not send data to FLEX or any third-party service.

IP allowlist (optional): addresses you type on Settings are stored in the WordPress options table. The plugin compares them to REMOTE_ADDR only. It does not store visitor IPs.

Secret bypass cookie (optional): if someone opens your secret link, a 7-day HttpOnly cookie (flex_maintenance_ok) is set so they can see the real site. The cookie holds the preview token. It is not used for analytics.

Preview (administrators only): Preview splash opens the public page with a nonce so you can check the design without logging out.

Limitations

This is a splash page, not a landing-page builder, form plugin, or analytics tool.
Only one full-page splash is shown. It does not hide wp-admin or the login form.
Fast page caches (including Flex Cache) are purged when settings change. The splash itself is not stored in Flex Cache.