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

Kostyantin Antonyuk

Offer Kostyantin work on your next project.

Ukraine Ukraine
7 days 18 hours back
Available for hire available for hire
1 Safe completed
10 months 4 days back
1 client
age 35 years
on the service 7 years
Client profile
Freelancer Kostyantin A. — Ukraine. Core skill — Apps for iOS (iPhone and iPad), Apps for iOS (iPhone and iPad)

Rating

Successful projects
No data
Average rating
No data
Rating
855
Apps for iOS (iPhone and iPad)
29 place out of 205
Apps for iOS (iPhone and iPad)
29 place out of 205

Skills and abilities

Mobile development

Portfolio


  • Tags: Save & Repost Videos

    Apps for iOS (iPhone and iPad)
    Tags: Save & Repost Videos — example of freelancer's portfolio work in category Apps for iOS (iPhone and iPad)
    SSSTik - a great tool for downloading with Tick Stream without watermark
    Just find the video you want to download, copy the link and open the sssTik app. The app will do everything for you.

  • English Lozanov

    Apps for iOS (iPhone and iPad)
    English Lozanov — example of freelancer's portfolio work in category Apps for iOS (iPhone and iPad)
    Application for the study of English words using the Lozanov methodology. There are also mobile payments.

  • Fonts Pro: Cool Fonts Keyboard

    Apps for iOS (iPhone and iPad)
    Fonts Pro: Cool Fonts Keyboard — example of freelancer's portfolio work in category Apps for iOS (iPhone and iPad)
    An application in which you can buy non-standard fonts and use them in other applications. KeyboardExtension was developed and InAppPurchase was integrated.

  • Beatbox Chatter chat for Beatbox fans

    Apps for iOS (iPhone and iPad)
    Beatbox Chatter chat for Beatbox fans — example of freelancer's portfolio work in category Apps for iOS (iPhone and iPad)
    He was engaged in the development of the interface on SwiftUI and partly participated in writing the functionality.

  • VARUS app for customers

    Apps for iOS (iPhone and iPad)
    VARUS app for customers — example of freelancer's portfolio work in category Apps for iOS (iPhone and iPad)
    Written this project from zero before release on AppStore

  • by Agroyard

    Apps for iOS (iPhone and iPad)
    by Agroyard — example of freelancer's portfolio work in category Apps for iOS (iPhone and iPad)
    The app was installed on the iPad, and it took up the removal of bugs.

Reviews and compliments on completed projects 1

29 July 2025 1013 USD
Development of iOS app, Health & Fitness - Part 1

Quality
Professionalism
Cost
Contactability
Deadlines

Kostyanin — a wonderful specialist who deeply understands the essence of the project, offers the best solutions, and is always in touch. I especially appreciate his proactive stance and openness in communication. I recommend him as a reliable and responsible performer, and I plan to continue collaborating.

Ihor Vashchenko | Personal | Response review

Activity

  Latest proposals 10
iOS/Android Developer5 Personal project
Development of iOS app, Health & Fitness - Part 1 Personal project
1013 USD
We are looking for an iOS developer (SwiftUI) to create a Health & Fitness app, iPhone — iOS 17 +
2062 USD
Publishing project on iOS
80 USD
Development of an application in Swift
800 USD
I am looking for a full-time iOS developer!
108 USD
Need to upload the finished IOS application to the developer account.
72 USD
SDK update, replacement of advertising IDs, implementation and configuration of Adapty
171 USD
Need to fix bugs in the iOS Swift application.
23 USD
Creation of a mobile application, updating of a web page
3493 USD