About us

A calm place for shared money

DueCircle is a free, private workspace for the money people share — built and maintained by Progragon Technolabs. We make focused, fast, genuinely-free tools and keep them running for the long term, without the upsell-at-every-turn pattern the category is known for.

Our parent company

Progragon Technolabs

Progragon Technolabs is a full-service software company specialising in premium web applications, developer tools, SaaS products and mobile apps. We believe great software is defined by attention to detail, performance and user experience — and DueCircle is proof of the standard we hold every build to.

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Progragon by the numbers

Projects delivered: 180+Projects delivered
Countries served: 10+Countries served
Industries: 10+Industries
Client retention: 98%Client retention

What Progragon builds

A full-service software partner for ambitious products

From a single landing page to a production SaaS platform, Progragon designs and engineers software end to end — with the same rigour that makes DueCircle's numbers add up every time.

Native app development

iPhone, iPad, watchOS & Mac apps
Android phone, tablet & watch apps
Windows desktop applications

Hybrid app development

Flutter cross-platform apps
.NET MAUI applications
Single codebase, all platforms

Web development

Next.js, React & TypeScript
SaaS & developer tools
SEO-optimised & accessible

Quality & performance

Production-grade architecture
Scalable & maintainable code
World-class user experience

Have a product to build, a SaaS to scale, or an app to ship? Progragon takes projects from idea to production — get in touch and let's talk about yours.

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Meet the founder

The person behind Progragon

Mitul Mandanka

Founder & CEO, Progragon Technolabs

With over 15+ years of experience in the software industry, Mitul founded Progragon Technolabs with a vision to build high-quality, developer-first products that solve real-world problems. DueCircle and StringTools are two of many projects driven by that mission — to give people the best possible tools, completely free and entirely private.

Tools by Progragon

What we've built

DueCircle

Shared expenses & bills

This product

A private workspace for families, couples, roommates and trip groups to split expenses fairly, track bills, and settle up in any currency — free forever.

Explore features

StringTools

Free developer utilities

A free utility toolkit for developers: 31 tools for formatting JSON, converting between JSON, XML, YAML and CSV, comparing diffs, testing regex, generating hashes and QR codes, and running everyday finance calculations. Like DueCircle, it runs entirely in your browser and needs no sign-up.

Visit StringTools

What we believe

Free should mean free

No premium tier, no trial, no feature that turns out to be locked. We're funded by ads on public pages — never by your group data.

Privacy is the default

We never connect to your bank, never hold your money, and keep the minimum data needed to run your groups.

Every number is defensible

Exact integer arithmetic, an audit trail on every edit, and splits that always sum back to the total. Trust is the product.

Questions, ideas or press?

We'd genuinely like to hear from you.