Mathematical Captcha Applier
Apply a simple mathematical captcha to specific buttons by providing their CSS class or ID to prevent spamming.
Use with caution
Mathematical Captcha Applier works, but test it on a staging site before relying on it in 2026. Was last updated 1 month ago, and scores 60/100 on our health check.
- Tested with the latest WordPress (7.1)
- Small user base (<10 active installs)
- Very few reviews so far
How does it stack up?
Side-by-side on installs, updates, ratings & support
Daily downloads
Download spikes usually follow a new release — each site that auto-updates counts as a download.
Rankings
Where Mathematical Captcha Applier stands todayWordPress.org search rankings
Live position in the plugin search, top 100| Keyword | Position |
|---|---|
| anti-spam | >100 |
| captcha | >100 |
| form security | >100 |
| math captcha | #34 |
| spam protection | >100 |
About Mathematical Captcha Applier
From the official readme · v1.0.1Description
Mathematical Captcha Applier is a lightweight WordPress plugin that lets you easily apply a simple math-based captcha to form submit buttons on your website by specifying their CSS selector. Just provide a specific button’s CSS selector, and the plugin will display a captcha prompt before the action is completed. This could help to prevent spam and unwanted bot activity.
Features:
– Add a mathematical captcha to form submit buttons (<input type="submit"> or <button type="submit">) by specifying their CSS selector (ID or class).
– Attempts to protect forms from automated submissions.
– No external dependencies — lightweight and fast.
– Simple configuration via the WordPress dashboard.
– If JavaScript is disabled, this plugin will hide the selected buttons.
How It Works:
When a user clicks the protected button, a small popup will appear asking them to solve a basic math problem (e.g., 5 + 3 = ?). If answered correctly, the action will proceed.
If JavaScript is disabled in the browser, the plugin hides the selected submit button.
Installation
- Upload the plugin files to the
/wp-content/plugins/mathematical-captcha-applierdirectory, or install the plugin through the WordPress Plugins screen. - Activate the plugin through the Plugins screen in WordPress.
- Go to Settings > Mathematical Captcha Applier to configure the buttons you want to protect.
Frequently asked questions
Does this work with all forms?
Yes, as long as the submit button is either or and you specify its unique class or ID as the selector.
Can I protect multiple buttons?
Yes, you can specify multiple selectors in the settings.
Does it require JavaScript?
Yes, the captcha popup and validation rely on JavaScript.
Is this plugin designed to handle all kinds of spamming threats?
No. This plugin is not designed to handle all types of spamming threats. It attempts to stop spamming attempts by using a CSS and JS based method.
Is it possible to include `input[type=”submit”]` or `button[type=”submit”]` as a selector?
No. Only specific selectors based on ID or class are allowed. Global selectors like input[type="submit"] and button[type="submit"] are blocked.
Changelog
1.0
- Initial release
1.0.1
- Updated “Tested up to” version.
- Improved plugin code to follow WordPress coding standards.
- Updated language file name.
For developers
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Best Mathematical Captcha Applier alternatives
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FAQ
Mathematical Captcha Applier: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Oct 3, 2026
Is Mathematical Captcha Applier free?
Yes. Mathematical Captcha Applier is free to download and use from the official WordPress.org plugin directory.
Is Mathematical Captcha Applier safe to use in 2026?
Mathematical Captcha Applier works, but test it on a staging site before relying on it in 2026. Was last updated 1 month ago, and scores 60/100 on our health check.
How many websites use Mathematical Captcha Applier?
Mathematical Captcha Applier is active on <10 WordPress websites and has been downloaded 590 times since it launched in September 2025. It was downloaded 55 times in the last 30 days.
Does Mathematical Captcha Applier work with WordPress 7.1?
Yes. The developer has tested Mathematical Captcha Applier up to WordPress 7.1.2, the latest release. It requires WordPress 5.6 or newer.
What PHP version does Mathematical Captcha Applier need?
Mathematical Captcha Applier requires PHP 7.4 or higher. Most hosts run PHP 8.x today, so it works on any modern WordPress hosting.
When was Mathematical Captcha Applier last updated?
The latest version, 1.0.1, was released on August 29, 2026 (1 month ago).
Who makes Mathematical Captcha Applier?
Mathematical Captcha Applier is developed and maintained by samiur6688.
What are the best alternatives to Mathematical Captcha Applier?
The most popular alternatives to Mathematical Captcha Applier are Akismet Anti-spam: Spam Pro… (5M+ installs), Antispam Bee (700K+ installs) and WP Armour (400K+ installs).
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