Switch to English?
Yes
Переключитись на українську?
Так
Переключиться на русскую?
Да
Przełączyć się na polską?
Tak

Volodymyr Kovalchuk

Offer Volodymyr work on your next project.

Ukraine Kropivnitskiy, Ukraine
2 months 10 days back
Available for hire available for hire
40 Safes completed
1 year back
26 clients
on the service 9 years

Rating

Successful projects
95%
Average rating
No data
Rating
1978
Apps for iOS (iPhone and iPad)
20 place out of 205
App Development for Android
33 place out of 341
22 projects
App Development for Android
16 projects
Apps for iOS (iPhone and iPad)
8 projects
Java
3 projects
Desktop Apps

Language proficiency level

Українська Українська: fluent
Русский Русский: fluent
English English: upper-intermediate

Skills and abilities

Programming

Mobile development

Portfolio


  • Intelligent hashtag assistant

    Apps for iOS (iPhone and iPad)
    Project description:
    Taglo is an iOS app that helps users find relevant hashtags for social media posts. The user enters a word, phrase, or uploads an image, and the app contacts the backend, where AI-based analysis is performed and ready hashtag recommendations are returned.

    Key features:
    • Text or image input for hashtag search.
    • Interaction with REST API to get results from the server.
    • Display of recommended hashtags with one-tap copying.
    • Modern and intuitive interface, fully implemented in SwiftUI.
    • MVVM architecture for clean, structured, and easily scalable code.

    My involvement:
    • Full implementation of the client-side of the app (UI, logic, network requests).
    • Development of architecture using the MVVM pattern.
    • Integration with the existing API for request processing and result retrieval.
    • Creation of UX/UI according to modern iOS design principles.
    • Working with asynchronous operations via Combine and handling loading/error states.

    #swift #mvvm #combine #swiftui #coredata
  • Smart Code Scanner

    Apps for iOS (iPhone and iPad)
    Smart Code Scanner
    Native iOS App built with SwiftUI & MVVM

    Smart Code Scanner is a modern iOS application designed to effortlessly scan and generate QR codes and barcodes.

    Built using SwiftUI and the MVVM architecture, the app provides a fast and intuitive user experience, allowing users to:
    • Instantly scan QR codes and barcodes using the device camera
    • Recognize codes from photos in the gallery
    • Generate custom QR codes for text, URLs, contacts, and more
    • Easily copy, save, or share scanned or generated results

    The interface is clean, responsive, and optimized for smooth daily use.
  • AI Homework App

    Apps for iOS (iPhone and iPad)
    AI Homework
    Native iOS app on SwiftUI

    AI Homework is an intelligent assistant for students, schoolchildren, and everyone who works with text.
    The app is built from scratch on SwiftUI and integrated with the official OpenAI API, allowing a wide range of tasks:
    • generate and edit texts;
    • check grammar and style;
    • create summaries;
    • translate;
    • write essays, letters, social media posts;
    • prepare for interviews;
    • send images for analysis;
    • conduct free-form conversations with AI in a dedicated chat.

    Dialogue history is stored locally for easy return to previous sessions.

    The project is implemented with a focus on stability, modern UI/UX, and deep integration with GPT model capabilities.

    #swiftui #mvvm #openai #chatgpt
  • Alarm Map Widget

    Apps for iOS (iPhone and iPad)
    its own project.
    The map of the trembling on the screen of the smartphone
  • Alarm Map Widget

    App Development for Android
    its own project.
    The map of the trembling on the screen of the phone.
  • Mobile app for AI Wallpapers

    Apps for iOS (iPhone and iPad)
    I have developed an app on order to install or download the spaller on the smartphone.
    He developed a mobile and server ashton.
  • We take promptly and without refusal

    App Development for Android
    We take promptly and without refusal — example of freelancer's portfolio work in category App Development for Android
    Development of the application prototype.
    Fasebook SDK, Firebase (Database + Storage)

    #Androd #java #Firebase #FacebookAPI
  • 68 USD

    Sports forecasts - 2018

    App Development for Android
    Appendix for Sports Events.
    Advertising on PHP.
    He developed the front and bake himself.
    (Blocked by Google Policy)
    #xml, #java, #Android, #mysql, #php
  • 45 USD

    Sports forecasts

    App Development for Android
    Blocked by Google Policy
  • SportsInfo

    App Development for Android
    Information about sports events.
  • Sports betting

    App Development for Android
    Sports forecast project.

Reviews and compliments on completed projects 42 2

28 May 2025 474 USD
iOS application

Quality
Professionalism
Cost
Contactability
Deadlines

All good
I recommend Volodymyr

Quality
Professionalism
Cost
Contactability
Deadlines

Great job, everything as agreed

Quality
Professionalism
Cost
Contactability
Deadlines

The project is completed, thank you for your cooperation!

28 November 2024 350 USD
Create app to Iphone

Quality
Professionalism
Cost
Contactability
Deadlines

Great work
Aaaaaaa+++++ aaaaa

15 October 2024 90 USD
Develop a Bluetooth terminal for Android with support for Android 5 to 14

Quality
Professionalism
Cost
Contactability
Deadlines

I need to write something, I need to write something. But what to write, I don't know what to write.

8 October 2024 92 USD
Subscription payment

Quality
Professionalism
Cost
Contactability
Deadlines

Excellent execution! I recommend for collaboration!

Quality
Professionalism
Cost
Contactability
Deadlines

Everything was done according to the specifications and in a short time. I recommend for collaboration as a professional in their field.

2 October 2024 50 USD
Added app to google play

Quality
Professionalism
Cost
Contactability
Deadlines

great work
AAA+++
did it fast

Quality
Professionalism
Cost
Contactability
Deadlines

great work
super fast AAA+++

4 August 2024 11 USD
Corrections in the program

Quality
Professionalism
Cost
Contactability
Deadlines

Excellent execution! I recommend for collaboration!

27 June 2024 90 USD
Edits for iOS application

Quality
Professionalism
Cost
Contactability
Deadlines

The work has been successfully completed.

26 June 2024 361 USD
An application in Swift for recording fitness tracker data in HealthKit

Quality
Professionalism
Cost
Contactability
Deadlines

The work has been successfully completed.

8 June 2024 11 USD
Edits in the program

Quality
Professionalism
Cost
Contactability
Deadlines

Completed the edits quickly and clearly. I recommend for collaboration!

8 June 2024 11 USD
Add the iPhone application to testflight (yours)

Quality
Professionalism
Cost
Contactability
Deadlines

Great performer, helped at every stage, gave a lot of advice. I recommend for cooperation!

Quality
Professionalism
Cost
Contactability
Deadlines

The project is done and I’m happy with the result. I recommend the executive to cooperate.

17 August 2022 1420 USD
Correction of bugs in the iOS application (swift)

Quality
Professionalism
Cost
Contactability
Deadlines

Владимир непрофессионально подошел к выполнению заказа, срок сорвал, практически ничего по заданию не выполнил, на связь не выходил.

Sergey S. | Personal

Quality
Professionalism
Cost
Contactability
Deadlines

With Vladimir, the results are very quickly achieved.

Profile deleted | Safe Safe | Response review

Quality
Professionalism
Cost
Contactability
Deadlines

Successfully performs important functions.
Applying Java and Kotlin, it is a great opportunity to support any projects.

Profile deleted | Safe Safe | Response review

Quality
Professionalism
Cost
Contactability
Deadlines

The project had to be closed because of the iron restrictions on my phone. The app is made and works on more new versions of Android. But in this way, unfortunately, it has no sense for me. Vladimir was a young man, trying to help and understand to the last. Responsibility and communicability at a high level.

Quality
Professionalism
Cost
Contactability
Deadlines

After a series of promises, the project was never completed, most likely never started.

Profile deleted | Safe Safe | Response review

Quality
Professionalism
Cost
Contactability
Deadlines

The project is done quickly, pleasant to collaborate!The !

Quality
Professionalism
Cost
Contactability
Deadlines

The project is done well, pleasant to collaborate!

Quality
Professionalism
Cost
Contactability
Deadlines

Good implementation of the project, I recommend cooperation!

Quality
Professionalism
Cost
Contactability
Deadlines

The work is well done, I recommend cooperation!The !

Quality
Professionalism
Cost
Contactability
Deadlines

The task is well done, I recommend cooperation!The !

25 March 2021 34 USD
Kotlin доработка мобильного приложения

Quality
Professionalism
Cost
Contactability
Deadlines

Надежный и исполнительный фрилансер.
Приятно иметь дело.

19 March 2021 90 USD
Разработка. Андроид приложения модов. на. Java/Kotlin

Quality
Professionalism
Cost
Contactability
Deadlines

Рекомендую к сотрудничеству!

9 March 2021 158 USD
Разработчик Android и iOS (приложение с нуля)

Quality
Professionalism
Cost
Contactability
Deadlines

Отличный исполнитель, настоящий профи своего дела. Все пожелания были учтены, результат выше моих ожиданий. Рекомендую всем. Спасибо большое!

Profile deleted | Personal | Response review

28 January 2021 113 USD
Android design app on Figma

Quality
Professionalism
Cost
Contactability
Deadlines

Thank you for good work. Vladimir in connection. It works quickly, quality, even with its improvements that we did not hesitate to predict at the stage of the TZ setting.

22 January 2021 45 USD
Приложение-игра под iOS — персональный проект для Владимира Ковальчука

Quality
Professionalism
Cost
Contactability
Deadlines

Все выполнено быстро и качественно. Будем работать!

Quality
Professionalism
Cost
Contactability
Deadlines

Successfully set up the UTM melt processing feature that allows the mobile application to track traffic sources from the Play Market, now we are able to determine where users will learn about the application.

Profile deleted | Safe Safe | Response review

Quality
Professionalism
Cost
Contactability
Deadlines

He fixed the problem in the project, proposing a new method of solution.
This is what we were looking for.

Profile deleted | Safe Safe | Response review

8 January 2021 45 USD
Publication of iOS Application

Quality
Professionalism
Cost
Contactability
Deadlines

I strongly recommend cooperation. 4 “specialists” could not introduce my application before this, Vladimir decided everything for a number of days. The master of his business, who clearly discovers and fulfills the task. I will be happy to work further!

Quality
Professionalism
Cost
Contactability
Deadlines

greatly ! Everything at the highest level!

30 November 2020 90 USD
Разработка ANDROID приложения в Java / Kotlin

Quality
Professionalism
Cost
Contactability
Deadlines

Хорошая работа по выполнению! Рекомендую

21 November 2020 45 USD
Разработка приложение на Андроид

Quality
Professionalism
Cost
Contactability
Deadlines

Доплата за переделывание по моей просьбе!

21 November 2020 90 USD
Android приложение на Java / Kotlin

Quality
Professionalism
Cost
Contactability
Deadlines

Хорошая работа! Все трудности были преодолены! Рекомендую!

27 October 2020 90 USD
Android приложение на Java / Kotlin

Quality
Professionalism
Cost
Contactability
Deadlines

Отличная работа! Ни единого бага! Рекомендую!

22 August 2020 88 USD
SWIFT, mobile application

Quality
Professionalism
Cost
Contactability
Deadlines

satisfied with work. It is worth noting that Vladimir even introduced a few moments that were not in the TZ. He has done additional work. He explained uncomprehensible moments and explained everything in detail. Some of the TZ moments were not implemented, but everything was immediately corrected. Therefore there are no problems. We will work further.

Profile deleted | Safe Safe | Response review

Quality
Professionalism
Cost
Contactability
Deadlines

I did everything in the best way with a really high level of implementation of the project. I strongly recommend cooperation.

Profile deleted | Safe Safe | Response review

5 April 2020 6 USD
Fixing of Android

Quality
Professionalism
Cost
Contactability
Deadlines

Thank you for the successful implementation of the project! I recommend Vladimir as a professional and responsible executive!

Quality
Professionalism
Cost
Contactability
Deadlines

I highly recommend Vladimir as an experienced, erudited and proactive specialist. So it came out that this project had to work with the legacy code. Everything is done very well. In addition, I am grateful to Vladimir for the audit of the “high places” in the project.
We continue our work now.

Quality
Professionalism
Cost
Contactability
Deadlines

The executor is very pleased!

Quality
Professionalism
Cost
Contactability
Deadlines

The project was done very quickly. There were delays from my side, the executive treated them with understanding, solve problems and difficulties not related to the project (help with the server) I recommend, great executive!

Profile deleted | Safe Safe | Response review

Activity

  Latest proposals 10
[Swift] Add push notifications
23 USD
Opening of the functionality of the Stark Varg motorcycle application Personal project
226 USD
An experienced iOS developer is needed to implement a mobile application based on artificial intelligence
23 USD
Replace the API in the mobile application
23 USD
We are looking for an iOS developer (SwiftUI) to create a Health & Fitness app, iPhone — iOS 17 +
29 USD
iOS application
474 USD
Request for collaboration on the development of a training mobile application
3494 USD
We are looking for a developer or a team to create native iOS applications in Swift.
23 USD
iOS application Homework Helper on ChatGPT API
474 USD
iOS application for creating resumes
474 USD