nodelogicwp

NodeLogic Graph Builder lets you build dynamic WordPress page logic, calculators, and reusable workflows without writing code.
You create your setup directly in Gutenberg:
<ol>
<li>Add input/output blocks from this plugin to your page.</li>
<li>Add the NodeLogic Graph Builder Logic block.</li>
<li>Open the graph editor and connect nodes to control values, conditions, styles, and behavior.</li>
<li>Save and publish.</li>
</ol>
Key Features:
<ul>
<li>Visual drag-and-drop node graph editor for calculators and workflows</li>
<li>Gutenberg blocks for inputs/outputs and page logic</li>
<li>Supports number, string, boolean, color, and basic CSS logic flows in the free version</li>
<li>Logic Block for page-level runtime behavior</li>
<li>Starter preset layouts for common calculator-style setups</li>
<li>Works locally inside WordPress (no license endpoint required)</li>
</ul>
Node Types Included:
<ul>
<li>Element blocks: Seekbar, Number Input, Text Input, Radio Group, Select, Checkbox, Label, Button Group</li>
<li>Graph nodes (free): Calculation, Condition, Switch/If, Boolean Logic, Math helpers, core String Logic, Colors, CSS, Outputs</li>
</ul>
Source: https://github.com/nodelogicwp/nodelogic-graph-builder

NodeLogic Graph Builder

Visual no-code calculator and workflow builder for Gutenberg blocks with conditional logic, dynamic content, and reusable presets.

niftyflowrocks

Niftyflow is a drag-and-drop form and calculator builder that enables you to easily create highly customizable form and calculator widgets. 
This plugin allows you to easily embed widgets created with our builder into your WordPress website using shortcodes.
<h3>Demo</h3>
Try a demo of our easy calculator builder for free <a href="https://niftyflow.rocks" rel="nofollow ugc">on our website</a> – instant access, no signup required.
<h3>Requirements</h3>
The plugin requires a niftyflow account. You can sign up for free at <a href="https://niftyflow.rocks" rel="nofollow ugc">niftyflow.rocks</a>.

Niftyflow – Form & Calculator Builder

Create multilingual price quote, ROI, and finance calculators with drag & drop. Easy to embed on any website. No developer or coding skills required.

NodeLogic Graph Builder vs Niftyflow – Form & Calculator Builder