Simonson Industries

Simonson
Industries

Practical software and games in development, built by Ryan Simonson.

See the products About

Products

Live now

Live · Finance

Chart My Payoff

Payoff calculators for student loans, credit cards and other loans. See how extra payments change your payoff date and total cost.

chartmypayoff.com
Live · Developer tools

Plainly Translated

Paste in XML and get it back as readable fields with plain-English explanations of what each part means.

plainlytranslated.com

Games

In development

Fatal Circuit gameplay: a sword hero surrounded by robots in a purple arena, with lightning striking around her
In development · Playable demo

Fatal Circuit

A 3D arena survival game. One sword-wielding hero holds the arena against waves of robots that get tougher with every stage. Built for phone and PC.

Play the free demo
Last Round gameplay: a survivor with a pistol in a parking lot at dusk, zombies closing in from the right as a grenade explodes
In development · Playable demo

Last Round

A 3D zombie survival game. One survivor holds a parking lot with a pistol, shotgun and grenades as the dead pour in from every side. Built for phone and PC.

Play the free demo

Updates

What's new

New features and releases across every product, newest first.

Nov 102026
Last Round

New game: free playable demo released

A zombie survival game for phone and PC. Six waves and a Goliath per stage, and each stage hits harder than the last.

Play the demo
Nov 102026
Fatal Circuit

Free playable demo released

Hold the arena against waves of robots on phone or PC. Six waves and a Siege Mech per stage.

Play the demo
Nov 102026
Simonson Industries

This site launched

One home for every product, with a contact address for questions and feedback.

Nov 92026
Chart My Payoff

Credit card payoff planner added

Enter your cards and the extra you can pay each month, then compare payoff plans side by side.

Try the planner
Nov 92026
Plainly Translated

Refreshed design

A cleaner layout that matches Chart My Payoff, so results are easier to scan.

About

One owner, several products

Simonson Industries is owned and run by Ryan Simonson. He designs and builds every product listed here.

For questions, feedback or business inquiries, email ryan@simonsonindustries.com.