ÖTEK Currency Converter

Linux & Android · Free & Open

Currency Converterfor Linux & Android

A single Flutter app built for both desktop and mobile - live exchange rates, a full ISO 4217 currency list, bi-directional conversion, and an hourly rate cache. One codebase, native on both platforms.

Download for Linux · .deb Download for Android · .apk

What it does

One app, two platforms,
zero compromises

Built with Flutter so the same interface, logic, and rate cache work identically whether you’re on your desktop or in your pocket.

Light Mode

Dark Mode

🌍

Full ISO 4217 List

Every world currency including precious metals (XAU, XAG, XPD, XPT) and special drawing rights, sorted alphabetically by code.

🔍

Searchable Picker

A search sheet filters by code or name as you type - jump straight to TRY or QAR without scrolling.

⇄

Bi-directional Input

Type in either amount field and the other recalculates live. A single tap swaps the currency pair.

⏱

1-Hour Rate Cache

Rates are fetched once per pair and cached locally for an hour - fast, light on data, and works offline right after.

🎨

Light & Dark Themes

Follows your system theme automatically on both Linux and Android - no toggle needed.

💾

Remembers Your Pair

The last currency pair you used is saved and restored automatically the next time you open the app.

How to use

Straightforward by design

Four interactions, that’s all. Open it, pick your currencies, type a number, done.

Pick your currencies

Tap either currency button to open the search sheet. Type a code or name, then tap to select.

Type an amount

Enter a number in either field - the other recalculates instantly using the live rate.

Swap if needed

Tap the swap button between the fields to flip the pair and recalculate in one motion.

Rates stay fresh

Each pair is cached for 1 hour. The status line under the amounts shows the live rate and cache status.

Installation

Pick your platform

Both builds come from the same Flutter codebase - install whichever fits your device, or both.

🐧

Linux

Primary · .deb

Download the package

Grab the .deb file directly, or with wget in your terminal.

wget https://otek.today/files/otek-doviz-converter_1.0.14_amd64.deb

Install with apt

Installs the app and pulls in any missing dependencies automatically.

sudo apt install ./otek-doviz-converter_1.0.14_amd64.deb

Launch it

Find it in your application menu, or launch directly from the terminal.

otek-doviz-converter

Built for amd64 (x86_64) systems. Debian, Ubuntu, Mint, Pop!_OS, and derivatives are supported.

📱

Android

Secondary · .apk

Download the APK

Tap the download button on this page from your Android device’s browser.

today.otek.doviz_converter-1.0.14.apk

Allow this source

Since it’s outside the Play Store, Android will ask permission to install from this source once.

Settings ▸ Apps ▸ Special access ▸
Install unknown apps ▸ allow your browser

Install & open

Tap the downloaded file to install, then open Currency Converter from your app drawer.

# tap the .apk in your notifications
# or Downloads app to install

Not yet on Google Play - this direct APK is signed and safe, but Android will flag it as an unknown source until installed once.

Browser Extensions

Also available in your browser

Prefer converting currencies without leaving your tab? The Ötek Currency Converter extension brings live rates to your browser - same engine, no installation, no account.

Firefox Add-on

Install from Mozilla Add-ons. Works in Firefox on all platforms - live exchange rates, 170+ currencies, no ads.

Add to Firefox

Chrome · Edge · Brave

Available on the Chrome Web Store. Works on any Chromium-based browser - same live rates, one-click install.

Add to Chrome

Ready to use it?

Free download · No account · Works offline after first fetch

Download for Linux Download for Android

Our Core Capabilities

Built to Perform Where It Counts

Custom Web Development

Websites engineered around your business, not a template — built to convert visitors into customers.

Seamless Mobile Solutions

Native-feeling apps that meet your customers on the device they actually use most.

Intuitive UI/UX Design

Interfaces people trust on first glance, clear, fast, and built around how users actually think.

Comprehensive Financial Reporting

Real-time dashboards that turn your numbers into decisions, not just records.

Clear and Concise

Your Questions, Answered

We know that understanding the intricacies of technology and finance can be challenging. That’s why we’ve compiled the most frequently asked questions to provide you with clear, straightforward answers. Explore our FAQ section to gain insights into how ÖTEK can support your business with innovative solutions and expert guidance.

Let’s Connect and Create Together

1. What types of businesses benefit from your web development services?

Answer: Our web development services are designed to cater to a wide range of industries, from startups to established enterprises. Whether you need a simple website to establish an online presence or a complex e-commerce platform, ÖTEK tailors solutions that align with your business goals and target audience.

2. How does your mobile app development process work?

Answer: Our mobile app development process begins with a thorough understanding of your business needs and objectives. We then move into design, development, and testing, ensuring the app is user-friendly, functional, and aligned with your brand. We also provide ongoing support and updates to keep your app performing optimally.

3. What is the typical timeline for completing a project?

Answer: The timeline for completing a project varies depending on the scope and complexity of the work. On average, a website or mobile app can take between 6 to 12 weeks from concept to launch. We prioritize clear communication and transparency throughout the process to keep you informed and ensure timely delivery.

4. How do you ensure the security of my data during financial analysis?

Answer: At ÖTEK, we take data security very seriously. We implement robust encryption, secure storage, and strict access controls to protect your sensitive financial information. Our team follows industry best practices and complies with relevant regulations to ensure your data remains secure at all times.

5. What sets your financial reporting services apart from others?

Answer: Our financial reporting services stand out due to our commitment to clarity, accuracy, and actionable insights. We don’t just provide numbers; we offer comprehensive reports with easy-to-understand dashboards that help you make informed decisions. Our team’s deep understanding of both technology and finance ensures that you get the most out of your data.

Let’s Get Started

Schedule Your Consultation

Ready to take the next step? Whether you have questions, need guidance, or are eager to kick off a new project, we’re here to help.

Book a meeting with our experts today, and let’s explore how ÖTEK can support your business goals with tailored solutions and innovative strategies.

+90 531 357 91 33