Virtual Entity Leading Our Zenith
VELOZ builds focused calculators, study tools and everyday utilities for iPhone and Android. Thirteen apps, twelve of them free to download, each one built to open fast and get out of the way.
Everything VELOZ makes is software you carry with you.
One developer, one studio, thirteen published apps.
Each app aims to be the clearest tool for its single job.
Built for students, DIYers and anyone doing quick maths.
Ship, read the reviews, refine. Then ship again.
The catalogue
Every app links straight to its store listing. Two of them exist on a single platform, and the badges say so rather than sending you to a dead end.
American exam 2025 study
Practice for the USCIS civics test with both official question banks. It covers the 2025 version — all 128 questions, the 20-question interview format, and the 12-correct passing mark — as well as the classic 2008 set, so you can study whichever path your filing date puts you on.
Sketch doodles and drafts
A drawing canvas with pencils, crayons and brushes, a full colour picker for custom palettes, and photo import so you can trace or build on a reference image. The workspace stays out of the way — no panels to manage before you start drawing.
Schedule reminder memory
Schedule a reminder for any exact moment — minutes, days or weeks ahead — instead of forcing tasks into fixed hourly slots. It sits between a plain to-do list and a full calendar: you attach a notification to the thing you want back, at the moment you want it back.
Rates and Pago Móvil fees
Convert dollars and euros to bolívares at the Banco Central de Venezuela rate, and work out Pago Móvil commissions before you send money. It covers the person-to-person, person-to-business and business-to-person cases separately, so the fee is known in advance.
Every calculator, no ads
The six VELOZ calculators in a single paid app with no ads: fractions, quadratic equations, 3×3 determinants by the Sarrus method, area and perimeter, and number-base conversion. Every tool shows its working step by step rather than just the answer.
Proportion and ratio solver
Solve proportions, ratios and percentages by cross multiplication. Enter the three values you know and the fourth appears as you type. An AI explanation breaks down why each step follows, which helps when you are checking homework rather than just needing the number.
Fraction operations, step by step
Add, subtract, multiply and divide proper and improper fractions, with every step shown and the result simplified automatically. Decimals and negative numbers are accepted, so it handles the mixed inputs that come up in real homework problems.
Second degree formula solver
Solve any quadratic equation and see the full working, including the cases with one root, two roots, or no real roots at all. The AI explanation covers the reasoning behind each step, not just the arithmetic.
Area and perimeter, nine shapes
Find the area and perimeter of nine shapes: triangle, square, rhomboid, circle, trapezoid, rectangle, pentagon, hexagon and parallelogram. Decimal input is supported throughout, and each figure explains which measurements it needs before you enter them.
3×3 determinants by Sarrus
Calculate the determinant of a 3×3 matrix using the rule of Sarrus. Enter nine values and swipe through each diagonal product in turn — the visual method, rather than expansion by cofactors, which makes it useful for checking linear algebra homework.
Binary, octal, decimal, hex
Convert between binary, octal, decimal and hexadecimal in any direction. Results appear as you type and copy with one tap, which is the point when you are moving a value straight into code or onto a homework sheet.
INR results and warfarin doses
Track INR results and warfarin doses together, for anyone on a vitamin K antagonist. The pill reminder announces the exact amount due today and rewrites itself when the prescription changes, so a reminder never repeats last week's dose. Logging, reminders and CSV export are free.
Script, record, caption
A teleprompter that listens: the script scrolls at your speaking pace, waits when you pause, and finds you again if you go off script. Record straight from the prompter, then export captions built from the words you wrote — as an .srt file or burned into the video. Free, with an optional Cue Pro plan.
The studio
VELOZ is the app studio of Juan Antonio Veloz Gutiérrez, an independent developer publishing on both the App Store and Google Play.
The catalogue leans toward small, single-purpose tools: seven of the thirteen apps are calculators, and most of them show their working rather than just returning an answer. The rest cover citizenship study, drawing, teleprompting, reminders, currency conversion and anticoagulation tracking.
The brand follows one idea from its design guide — tecnología fluida, humana, dinámica. Fast, but not cold.
Questions
Twelve of the thirteen apps are free to download. All in One Calculator is a one-time $1.99 purchase that bundles six calculators together with no ads. Coagly is free — logging, reminders and export cost nothing — and offers an optional Pro upgrade for its dose calculator and deeper trend insights. Cue is free with the full prompter and recording; Cue Pro lifts the script and export limits and adds voice tracking, captions and the AI script tools.
Twelve of the thirteen are on Google Play. Eleven apps are on both stores. Notify is iPhone only, and Céntimos is Android only — every card below shows the badges for the platforms that app actually supports.
Yes. Fraction Calculator, Quadratic Equation Solver, Sarrus Calculator and Rule of 3 all break the solution into steps. Rule of 3, Quadratic Equation and Area Calculator add a plain-language AI explanation of why each step follows.
All in One Calculator is the ad-free option. For $1.99 it bundles fractions, quadratic equations, Sarrus determinants, area and perimeter, and number-base conversion into one app.
Juan Antonio Veloz Gutiérrez, an independent developer publishing under the name VELOZ on Google Play and under his own name on the App Store.
VELOZ apps on the App Store require iOS 15.0 or later, except Cue, which needs iOS 16.4 or later. Android requirements vary by app and are listed on each Google Play page.