Gamified user engine with EXP levels, Coin/Cash wallet, check-in, VIP, inbox, and referral – powered by REST API and Vanilla JS.

Init User Engine – Gamified, Fast, Frontend-First

<p><strong>Init User Engine</strong> is a lightweight, no-bloat user system for modern WordPress sites. It&#8217;s designed for maximum frontend flexibility and gamified user engagement. All dynamic interfaces are rendered via JavaScript with real-time REST API interaction.</p>
<p>No jQuery. Minimal settings. Smart by default.</p>
<p>What you get:</p>
<ul>
<li>Display user avatar and dashboard via shortcode</li>
<li>Show level, EXP, Coin/Cash, and full user wallet</li>
<li>Let users check-in daily and receive timed rewards</li>
<li>Auto-track referral registrations with reward system</li>
<li>Allow users to buy VIP status using in-site currency</li>
<li>Built-in inbox for notifications (uses custom DB table)</li>
<li>Custom avatar support with upload &amp; preview modal</li>
<li>Send custom notifications to selected users or all members from wp-admin</li>
</ul>
<p>This plugin is the core user system behind the <a href="https://en.inithtml.com/init-plugin-suite-minimalist-powerful-and-free-wordpress-plugins/" rel="nofollow ugc">Init Plugin Suite</a> – optimized for frontend-first interaction, extensibility, and real-time gamification.</p>
<p>GitHub repository: <a href="https://github.com/brokensmile2103/init-user-engine" rel="nofollow ugc">https://github.com/brokensmile2103/init-user-engine</a></p>
<h3>Features</h3>
<ul>
<li>Avatar shortcode <code>[init_user_engine]</code> + modal dashboard  </li>
<li>Avatar system with upload, preview, and revert support  </li>
<li>EXP &amp; Level system with hookable progression logic  </li>
<li>Coin &amp; Cash wallet system with transaction logs  </li>
<li>Daily check-in with streak milestones &amp; online bonus timer  </li>
<li>Inbox system with pagination, read/claim/delete  </li>
<li>VIP membership system with Coin-based purchase &amp; expiry  </li>
<li>Referral module with cookie-based signup tracking  </li>
<li>Redeem Code / Gift Code module – code in, rewards out</li>
<li>REST API for all features (read/write/modify)  </li>
<li>Action/filter hooks for full customization  </li>
<li>Pure Vanilla JS frontend – no jQuery, no server bloat  </li>
<li>Admin notification panel to send messages to selected users or all members</li>
</ul>
<h3>Developer Hooks</h3>
<h3>Filters</h3>
<ul>
<li><code>init_plugin_suite_user_engine_online_minutes</code> – Modify required online minutes after check-in  </li>
<li><code>init_plugin_suite_user_engine_vip_prices</code> – Modify VIP package prices  </li>
<li><code>init_plugin_suite_user_engine_referral_rewards</code> – Modify referral rewards  </li>
<li><code>init_plugin_suite_user_engine_localized_data</code> – Modify frontend JS data  </li>
<li><code>init_plugin_suite_user_engine_calculated_coin_amount</code> – Modify Coin reward before apply  </li>
<li><code>init_plugin_suite_user_engine_calculated_exp_amount</code> – Modify EXP reward before apply  </li>
<li><code>init_plugin_suite_user_engine_exp_required</code> – Modify EXP required per level  </li>
<li><code>init_plugin_suite_user_engine_checkin_milestones</code> – Set milestone streak days  </li>
<li><code>init_plugin_suite_user_engine_format_inbox</code> – Modify formatted inbox data  </li>
<li><code>init_plugin_suite_user_engine_render_level_badge</code> – Customize level badge HTML  </li>
<li><code>init_plugin_suite_user_engine_inbox_insert_data</code> – Modify inbox data before inserting into database  </li>
<li><code>init_plugin_suite_user_engine_validate_register_fields</code> – Validate or modify registration fields before account creation  </li>
<li><code>init_plugin_suite_user_engine_after_register</code> – Hook after successful user registration (pass user ID and submitted data)  </li>
<li><code>init_plugin_suite_user_engine_daily_tasks</code> – Add or modify daily task list and logic  </li>
<li><code>init_plugin_suite_user_engine_captcha_bank</code> – Extend or modify the internal captcha question bank used for fallback validation  </li>
<li><code>init_plugin_suite_user_engine_format_log_message</code> – Customize transaction log message display with access to entry data, source, type, and amount  </li>
<li><code>init_plugin_suite_user_engine_should_keep_original</code> – Override decision to keep original uploaded avatar (GIF or other formats)  </li>
<li><code>init_plugin_suite_user_engine_vip_expire_soon_threshold</code> – Modify the threshold (in seconds) used to determine when VIP is considered close to expiration  </li>
<li><code>init_plugin_suite_user_engine_body_vip_classes</code> – Add, remove, or modify VIP-related CSS classes applied to the <code>&lt;body&gt;</code> element</li>
<li><code>init_plugin_suite_user_engine_theme_colors</code> – Modify theme color system (primary and active colors)</li>
</ul>
<h3>Actions</h3>
<ul>
<li><code>init_plugin_suite_user_engine_level_up</code> – When user levels up  </li>
<li><code>init_plugin_suite_user_engine_exp_added</code> – After EXP is added  </li>
<li><code>init_plugin_suite_user_engine_transaction_logged</code> – After Coin/Cash is logged  </li>
<li><code>init_plugin_suite_user_engine_exp_logged</code> – After EXP log is recorded  </li>
<li><code>init_plugin_suite_user_engine_inbox_inserted</code> – After new inbox message  </li>
<li><code>init_plugin_suite_user_engine_referral_completed</code> – When referral is completed  </li>
<li><code>init_plugin_suite_user_engine_after_checkin</code> – After user check-in  </li>
<li><code>init_plugin_suite_user_engine_after_claim_reward</code> – After user claims reward  </li>
<li><code>init_plugin_suite_user_engine_vip_purchased</code> – After VIP is purchased  </li>
<li><code>init_plugin_suite_user_engine_add_exp</code> – Triggered when adding EXP via hook  </li>
<li><code>init_plugin_suite_user_engine_add_coin</code> – Triggered when adding Coin via hook  </li>
<li><code>init_plugin_suite_user_engine_coin_changed</code> – After user’s Coin balance is updated  </li>
<li><code>init_plugin_suite_user_engine_cash_changed</code> – After user’s Cash balance is updated  </li>
<li><code>init_plugin_suite_user_engine_admin_send_notice</code> – When admin sends notification via wp-admin.</li>
</ul>
<h3>REST API Endpoints</h3>
<p><strong>Base:</strong> <code>/wp-json/inituser/v1/</code></p>
<ul>
<li><code>POST /register</code> – Create a new user account  </li>
<li><code>POST /checkin</code> – Daily check-in  </li>
<li><code>POST /claim-reward</code> – Claim reward after online duration  </li>
<li><code>GET  /transactions</code> – Get Coin/Cash transaction log  </li>
<li><code>GET  /exp-log</code> – Get EXP log  </li>
<li><code>GET  /inbox</code> – Get inbox messages  </li>
<li><code>POST /inbox/mark-read</code> – Mark a message as read  </li>
<li><code>POST /inbox/mark-all-read</code> – Mark all as read  </li>
<li><code>POST /inbox/delete</code> – Delete a single message  </li>
<li><code>POST /inbox/delete-all</code> – Delete all messages  </li>
<li><code>POST /vip/purchase</code> – Purchase VIP package  </li>
<li><code>GET  /referral-log</code> – Get referral history  </li>
<li><code>POST /avatar</code> – Upload new avatar  </li>
<li><code>POST /avatar/remove</code> – Remove custom avatar and revert to default  </li>
<li><code>GET  /profile/me</code> – Get current user profile  </li>
<li><code>POST /profile/update</code> – Update profile information</li>
<li><code>GET  /daily-tasks</code> – Get list of completed daily tasks and rewards</li>
<li><code>POST /exchange</code> – Convert Cash <span aria-hidden="true" class="wp-exclude-emoji">→</span> Coin based on exchange rate</li>
<li><code>POST /redeem-code</code> – Redeem gift code (returns Coin/Cash rewards)</li>
</ul>
<h3>License</h3>
<p>This plugin is licensed under the GPLv2 or later.<br />
You are free to use, modify, and distribute it under the same license.</p>


Alternative Plugins for

Discover the Lists with Init User Engine – Gamified, Fast, Frontend-First