Independent software studio · Brazil
Small, well-made apps for Android
& free tools for the web
TriVisionTech designs, builds and ships its own products. Everything here is live on Google Play or runs free in your browser — built and maintained by us.
- 8
- Android apps
- 33
- free web tools
- 0
- trackers in our apps
The studio
An independent app studio, building in the open
TriVisionTech is a small software studio in Brazil that makes and ships its own products. We are not an agency for hire and this is not a concept portfolio: every app listed here is live on Google Play, used by real people, and updated on a regular schedule. Our focus is a handful of well-made Android apps plus a set of free web tools that anyone can use straight from the browser.
We build with modern Android technology — Kotlin and Jetpack Compose — and care about the parts users feel: fast startup, smooth screens, sensible offline behaviour and no clutter. Most of our apps work without an account and keep your data on your device.
Products
Our Android apps
PDF Scan
Productivity
Turn your phone into a pocket document scanner.
🔒 No data collected
PDF Reader Pro
Productivity
A fast, no-clutter PDF reader for Android.
🔒 No data collected
Grana Guru
Finance
Take control of your money, one entry at a time.
🔒 No data collected
MetaCalc
Tools
A calculator with everything you actually use.
🔒 No data collected
Authra
Tools
Two-factor codes that never leave your phone.
🔒 No data collected
Audiva Music
Music & Audio
Your offline music and video player.
🔒 No data collected
FotoGrid Pro
Photography
Make photo collages in seconds.
🔒 No data collected
WorldCoffee
Food & Drink
Explore the world of coffee.
🔒 No data collected
Free to use
Free web tools
Alongside the apps we publish free, browser-based utilities — calculators, converters, text & data, generators, security, media. They run entirely on your device: nothing you type or upload is sent to a server, and they keep working offline once the page has loaded.
Percentage Calculator
Percent of a number, percent change, discount price, and tip splitting - five common questions in one tool.
Compound Interest Calculator
See how savings grow over time with regular contributions and compound interest.
Unit Converter
Convert length, weight, temperature, area, volume, speed, time, pressure, energy and data - instantly, in your browser.
Unix Timestamp Converter
Convert Unix time (epoch seconds or milliseconds) to a readable date, or a date to a timestamp, instantly in your browser.
Word & Character Counter
Live word, character, sentence and reading-time counts as you type.
Base64 Encoder / Decoder
Convert text to Base64 and back, with full Unicode support, in your browser.
Lorem Ipsum Generator
Generate paragraphs, sentences or words of classic Lorem Ipsum filler text.
Random Number Generator
Pick fair random numbers in any range, with an option for no repeats.
Principles
What makes our apps different
Offline-first
The core of each app keeps working with no connection whenever the task allows it.
Private by default
No unnecessary permissions and no third-party tracking inside the apps; your content stays on the device unless you export it.
No account required
Most apps open and work straight away — no sign-up, no email wall.
No intrusive ads in the apps
Where an app is free, it stays usable and uncluttered.
Have a question or an idea?
Feedback on an app, partnership ideas, or press — we read everything and reply.