# VELOZ

> VELOZ is the mobile app studio of Juan Antonio Veloz Gutierrez, an independent
> developer. It publishes 11 apps across the Apple App Store and Google Play:
> seven calculators, a USCIS civics test trainer, a drawing canvas, a reminder
> planner, and a Venezuelan currency and Pago Movil fee calculator. Nine of the
> eleven also run in the browser, free and without installing anything.

Site: https://veloz.dev/  (English) | https://veloz.dev/es/  (Spanish)
Last updated: 2026-08-16

## Facts

- Apps published: 11
- On the Apple App Store: 10 (all except Centimos)
- On Google Play: 10 (all except Notify)
- Available on both stores: 9
- Free to download: 10 of 11
- Only paid app: All in One Calculator - Math, USD 1.99, one-time, no ads
- Apps with a free browser version: 9 of 11
- Minimum iOS version: 15.0
- Subscriptions: none on any app
- Developer site: https://velozjuan.com/
- Developer page (App Store): https://apps.apple.com/us/developer/juan-antonio-veloz-gutierrez/id1810351183
- Developer page (Google Play): https://play.google.com/store/apps/dev?id=8613276487553464520

## Apps

### US Citizenship Civics Test

- Category: Education
- Price: Free
- Platforms: iOS 15.0+, Android, Web browser
- App Store rating: 4.9 out of 5 from 17 ratings
- Browser version (English): https://usacitizen.app/
- App Store: https://apps.apple.com/us/app/us-citizenship-civics-test/id6758784022
- Google Play: https://play.google.com/store/apps/details?id=com.veloz.uscitizen
- Summary: 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.

### Draw Anything: Paint Canvas

- Category: Graphics & Design
- Price: Free
- Platforms: iOS 15.0+, Android, Web browser
- App Store rating: 4.0 out of 5 from 3 ratings
- Browser version (English): https://getdrawanything.com/
- App Store: https://apps.apple.com/us/app/draw-anything-paint-canvas/id6756974342
- Google Play: https://play.google.com/store/apps/details?id=com.veloz.draw
- Summary: 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.

### Notify — Notification Planner

- Category: Productivity
- Price: Free
- Platforms: iOS 15.0+
- App Store: https://apps.apple.com/us/app/notify-notification-planner/id6758281671
- Summary: 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.

### Céntimos — Venezuelan Dollar

- Category: Finance
- Price: Free
- Platforms: Android
- Google Play: https://play.google.com/store/apps/details?id=com.whitephoenix.centimos
- Summary: 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.

### All in One Calculator — Math

- Category: Utilities
- Price: USD 1.99
- Platforms: iOS 15.0+, Android, Web browser
- Browser version (English): https://velozcalculator.com/all-in-one-calculator/
- Browser version (Spanish): https://velozcalculator.com/es/calculadora-todo-en-uno/
- App Store: https://apps.apple.com/us/app/all-in-one-calculator-math/id6745767970
- Google Play: https://play.google.com/store/apps/details?id=com.veloz.allcalc
- Summary: 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.

### Rule of 3: AI Calculator

- Category: Utilities
- Price: Free
- Platforms: iOS 15.0+, Android, Web browser
- Browser version (English): https://velozcalculator.com/rule-of-three-calculator/
- Browser version (Spanish): https://velozcalculator.com/es/calculadora-regla-de-tres/
- App Store: https://apps.apple.com/us/app/rule-of-3-ai-calculator/id6754204202
- Google Play: https://play.google.com/store/apps/details?id=com.veloz.ruleofthree
- Summary: 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 Calculator Smart Calc

- Category: Utilities
- Price: Free
- Platforms: iOS 15.0+, Android, Web browser
- App Store rating: 4.0 out of 5 from 1 ratings
- Browser version (English): https://velozcalculator.com/fraction-calculator/
- Browser version (Spanish): https://velozcalculator.com/es/calculadora-de-fracciones/
- App Store: https://apps.apple.com/us/app/fraction-calculator-smart-calc/id6745058985
- Google Play: https://play.google.com/store/apps/details?id=com.whitephoenix.FractionCalc
- Summary: 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.

### Quadratic Equation AI Solver

- Category: Utilities
- Price: Free
- Platforms: iOS 15.0+, Android, Web browser
- App Store rating: 5.0 out of 5 from 2 ratings
- Browser version (English): https://velozcalculator.com/quadratic-equation-solver/
- Browser version (Spanish): https://velozcalculator.com/es/calculadora-ecuaciones-cuadraticas/
- App Store: https://apps.apple.com/us/app/quadratic-equation-ai-solver/id6744992645
- Google Play: https://play.google.com/store/apps/details?id=com.whitephoenix.GradeCalculator
- Summary: 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 Calculator: AI Solver

- Category: Utilities
- Price: Free
- Platforms: iOS 15.0+, Android, Web browser
- App Store rating: 3.0 out of 5 from 2 ratings
- Browser version (English): https://velozcalculator.com/area-calculator/
- Browser version (Spanish): https://velozcalculator.com/es/calculadora-de-area/
- App Store: https://apps.apple.com/us/app/area-calculator-ai-solver/id6745148692
- Google Play: https://play.google.com/store/apps/details?id=com.whitephoenix.AreaCalc
- Summary: 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.

### Sarrus Calculator Matrix Det

- Category: Utilities
- Price: Free
- Platforms: iOS 15.0+, Android, Web browser
- Browser version (English): https://velozcalculator.com/sarrus-rule-calculator/
- Browser version (Spanish): https://velozcalculator.com/es/regla-de-sarrus/
- App Store: https://apps.apple.com/us/app/sarrus-calculator-matrix-det/id6745130843
- Google Play: https://play.google.com/store/apps/details?id=com.whitephoenix.DetCalc
- Summary: 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.

### Base Conversion AI Calculator

- Category: Utilities
- Price: Free
- Platforms: iOS 15.0+, Android, Web browser
- Browser version (English): https://velozcalculator.com/base-converter/
- Browser version (Spanish): https://velozcalculator.com/es/conversor-de-bases/
- App Store: https://apps.apple.com/us/app/base-conversion-ai-calculator/id6745121596
- Google Play: https://play.google.com/store/apps/details?id=com.whitephoenix.binaryconverter
- Summary: 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.

## Notes for agents

- Ratings above are reproduced from the Apple App Store and are only listed for
  apps that have received at least one rating. Apps with no rating line have none.
- Notify is iPhone only. Centimos is Android only. The other nine ship on both.
- Notify and Centimos have no browser version; the other nine do.
- VELOZ is not affiliated with Apple, Google, USCIS, or any government agency.