Travel Calculator - Interview with the developer of a fantastic app

Did you have any prior development or coding experience?


What was the most challenging aspect of developing mobile app?

Building a solid app that works on all devices was the most challenging aspect. Users' devices are extremely diverse, leading to various unexpected conditions that could cause app crashes and user complaints.

As an independent software developer, I specialize in app development and enterprise system architecture design and implementation. With expertise spanning from frontend to backend tools, I am adept at creating seamless and user-friendly experiences. With a passion for innovation, I take pride in delivering top-notch solutions that cater to diverse needs. Let's bring your ideas to life together!

Name a few of your favorite apps and reason you love them.

JapanTransitPlanner: A must-have if you plan to travel by JR in Japan.
Travel Calculator: It truly makes currency exchange easier than ever before.
Forest: Helps me stay focused on tasks that need to be done.

How long have you been working on this app?

For 10 years.

What need of the user did you have in mind when developing this app?

Real-time currency exchange. Simple but solid calculator for numerical calculations. Customized exchange rates that can be locked during rate updates.

In what way do you think your app is better than similar apps on the market? Please describe in detail what innovation you think you bring and what you are proud of in your app.

In comparison to other apps in the market, Travel Calculator stands out as a superior choice due to its unique and innovative features that cater to travelers' currency conversion needs. The key aspects that set our app apart are:

Real-time Exchange Rate Updates: Unlike many other apps that provide fixed exchange rates, Travel Calculator offers users the advantage of real-time updates on currency exchange rates. This ensures that travelers get accurate and up-to-date conversion results, allowing them to make informed financial decisions on the go.

Customizable Exchange Rates: Our app goes beyond the standard exchange rate options by allowing users to customize their own exchange rates. This feature is particularly useful for individuals who have access to better rates through special agreements or personal connections.

Locked Custom Rates: We take customization a step further by introducing the option to lock in the custom exchange rates. This means users can secure their preferred rates for a specific duration, safeguarding them from sudden fluctuations in the financial market.

Convenient Tax and Tip Buttons: Recognizing that travelers often encounter varying tax rates and tipping practices in different regions, Travel Calculator simplifies the process with dedicated buttons for taxes and tips. This feature expedites expense calculations, making it effortless for users to manage their budgets accurately.

Personally, I am immensely proud of the user-centric design and functionality we have incorporated into Travel Calculator. As a frequent traveler myself, I understand the frustration of outdated exchange rates and the complexities of manual calculations. Our app addresses these pain points head-on, providing a seamless and efficient currency conversion experience.

What are your future plans and expected features of the coming new versions of this app?

Our future plans for Travel Calculator are exciting and aimed at enhancing the user experience with even more personalized and versatile features. In the upcoming new versions of the app, we have two major additions in mind:

Customizable Calculation Button: We are thrilled to introduce an "Arbitrary Calculation" button, which will allow users to create and customize simple calculation formulas within the app. Whether it's a quick currency conversion with an added markup or a calculation involving taxes and tips, this feature will empower users to perform personalized computations effortlessly.

Custom Currency Creation: We understand the need for flexibility in currency conversion, especially when dealing with unique or imaginary scenarios. Hence, we plan to introduce a "Custom Currency" function, enabling users to create and define their own fictional currencies. Users will have the freedom to assign exchange rates and use them in conversions alongside real-world currencies, fostering creativity and catering to niche use cases.

These upcoming features represent our commitment to continually innovate and tailor Travel Calculator to suit the diverse needs of our users. We aim to provide a one-stop solution for all currency-related calculations, making it an indispensable travel companion for globetrotters and finance enthusiasts alike.

In addition to these major updates, we will also focus on regular app maintenance and performance optimization, ensuring seamless functionality across various devices and operating systems. As always, user feedback and suggestions play a crucial role in shaping our development roadmap, and we look forward to incorporating valuable insights from our growing community of users.

Overall, we are dedicated to making Travel Calculator the most comprehensive and user-friendly currency conversion app on the market, and these upcoming features are just the beginning of our journey towards achieving that goal.

Assuming new users of your app are reading this page. What do you want to ask them to do (contact you about X, Share the app, etc.)?

To all the new users discovering Travel Calculator, welcome! We designed this app with the intention of making your international journeys a breeze when it comes to currency conversion. We hope you find it incredibly useful and convenient during your travels.

If you have any feedback, suggestions, or encounter any issues while using the app, we encourage you to reach out to us. Your insights are invaluable in helping us improve Travel Calculator and tailor it to better meet your needs. Feel free to contact us through the in-app support feature or via our official website.

Moreover, if you find Travel Calculator beneficial and enjoyable, we kindly ask you to share the app with your friends, family, and fellow travelers. Spreading the word about our app will not only help them have stress-free currency conversions but also contribute to our growing community, enabling us to continuously enhance and expand the app's features.

Thank you for choosing Travel Calculator, and we look forward to being part of your incredible journeys around the world! Safe travels!

Travel Calculator

About App:

Convert over 100 currencies in real time, even without internet connection.

Set your own rates and lock them to avoid changes.

Use OFF/TAX/TIP buttons to simplify your calculations during your travel.

Enjoy a well-designed calculator for your convenience.


- Update anytime, anywhere, with minimal bandwidth usage.
- Customize and lock your own rates for consistency.
- Use Travel Calc offline without any connection issues.
- Choose your favorite currencies for quick selection.
- Swap main and focus currency with one click.

Download Travel Calc today and make currency exchange hassle-free.

Travel Calc makes your travel easy and wonderful. Let Travel Calc handle the annoying currency exchanges for you.

Categories: Travel & Local

Date: August 7, 2023

Developer: Eric Lin

About developer: As an independent software developer, I specialize in app development and en ... Read more



App URL in iTunes
App URL in Google Play


> A multifunctional track logger that can be used for a wide range of purposes.
Faye Travel Insurance

Faye Travel Insurance

July 6, 2023

What if travel insurance did more than wait for something to go wrong - what if it h ...

Incredible on-the-water travel and outdoor experiences start with GetMyBoat. Find bo ...
MyWoWo – Audio Guide

MyWoWo – Audio Guide

February 1, 2023

Listen to all the audio content free for 30 seconds, or purchase all the audio conte ...


Every day we publish one great app and help 750,000 users discover new apps to add to their mobile device. Click here to add your app and let users discover it for free.

Social Links