Tools for people whose jobs have standards.

DahVio Studios is a one-person studio in Long Beach, California. Most of what I build is scoring and reference work — a service member's PT test, a hazmat placard, a firefighter's CPAT, a promotion board. Where there's a published standard, the standard is the product: if the number is wrong, the app is worthless, so the numbers come straight from the regulation.

The rest is what a working studio picks up along the way — browser extensions, earlier apps, a few web properties. All of it shipped.

Solo developer Marine Corps veteran Father of two Long Beach, CA
01

Military

Fitness scoring and promotion prep for every branch, built to the current instruction. Free calculators on the web, full apps on the App Store.

Fitness scoring · by regulation
Air Force Air Force PT Calculator USAF and Space Force PFA scoring with altitude adjustment, passing-score help, and what-if mode. DAFMAN 36-2905 → Marines Marine PFT Calculator Pull-ups or push-ups, crunches or plank, and the 3-mile run. Max 300. MCO 6100.13A → Navy Navy PRT Calculator Push-ups, plank, and all four cardio alternatives — run, swim, bike, row. OPNAVINST 6110.1L → Army Army AFT Calculator All five events: deadlift, hand-release push-ups, sprint-drag-carry, plank, 2-mile run. FM 7-22 →
Promotion & career
Air Force WAPS Study E5 and E6 promotion prep — AFH-1 review, flashcards, drills, and deeper SJT practice. Free 2027-cycle study guides on the site. App Store → Air Force EPB BuilderWaitlist Turns plain-language accomplishments into promotion-ready EPB narrative, without staring at a blank form. In development → All branches PaygradeWaitlist Retirement finance — High-3, BRS, Final Pay and CSB/Redux, with SBP and state tax estimates. In development →
02

Field & trade

Reference apps for people working away from a desk and often away from signal. Offline-first, one-time purchase, no account.

Hazmat HazMat Pro All 19 DOT placards, 55+ UN numbers with ERG guide numbers, GHS pictograms, and a voice-powered Identify tool. 49 CFR · ERG → Fire CPAT Prep Personalized weekly training plan, event timers, and confidence tracking across all 8 CPAT events. IAFF/IAFC CPAT → Trucking CB Radio — Trucker's Handbook All 40 channels with frequencies, the complete 10-code reference, and trucker slang. FCC Part 95 → Hunting Hunting Tags & License Tracker Tags, licenses, season dates, draw applications and preference points — with reminders before every opener and deadline. State regs →
03

Browser

Chrome extensions. Local-first — no account, and the data stays in the browser.

Productivity LoadOut Turns Chrome's new tab into a home base for your projects — the right links, tabs and next step, one click away. Chrome Web Store → Language WordBridge Highlight a word for its definition and translation; it saves with the sentence you found it in. Four study modes. Chrome Web Store → Local SEO EchoPost Turns an Instagram caption into a proper Google Business Profile post, with the right post type, length and CTA. Chrome Web Store →
04

Also shipped

Everything else that's live — earlier apps, side projects, and web properties.

05

Now

What I'm actually working on this month.

Playable

Paper Football

The lunch-table classic. Flick it, hang it off the edge, kick it through the fingers. Play it free in your browser while the iPhone version comes together.

Live

LoadOut

Project workspaces for Chrome, now on the Web Store. Everyone who joins early access at loadout.page gets Pro free for life.

Live

WAPS Study

E5/E6 promotion prep on the App Store, now backed by free WAPS guides and 2027-cycle content on the site.

Building

Paygrade

Military retirement finance across High-3, BRS, Final Pay and CSB/Redux for all six branches. Waitlist open.

Building

EPB Builder

Narrative tool for Airmen writing EPBs. Plain-language accomplishments in, promotion-ready bullets out. Waitlist open.

06

About

I'm Ray, founder of DahVio Studios — named after my daughters, Dahlia and Violet. Marine Corps veteran, single dad, solo developer.

I started with a PT calculator because the ones I could find were wrong, or buried in ads, or wanted a subscription to tell me a number the instruction already publishes for free. Real users sent feedback, I iterated, and the rest followed from the same instinct: promotion boards and fitness standards are high-stakes moments, and the tools weren't built by someone who'd been through them.

Everything on this page is shipped and in someone's hands.

Full bio and media kit →

07

Contact

Press, partnerships, bug reports, or a standard I've gotten wrong — all welcome at the same address.

ray@dahvio.com