You will get iOS Bug Fixing & Debugging
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Top Rated
Project details
I fix problems in existing iOS apps: crashes, bugs, build errors, and performance issues.
14+ years of iOS experience with Swift, SwiftUI, UIKit, and Objective-C. I've shipped 40+ apps, including a fitness app used by 2.7M people.
Most single-bug fixes are delivered within 24-48 hours. I get oriented in an unfamiliar codebase fast - and every change is reproduced, reviewed and tested by me on a real device before delivery.
Common issues I fix:
• App crashes and crash log analysis (EXC_BAD_ACCESS, SIGSEGV)
• Xcode build, signing, and dependency errors
• Swift and SwiftUI bugs and layout issues
• UI freezes, slow scrolling, and performance problems
• Memory leaks and retain cycles
• App Store rejection and submission problems
• Push notifications, StoreKit, and subscription issues
• Bugs that appeared after an iOS or Xcode update
• AI-generated iOS apps that no longer build or run
I don't patch symptoms - I reproduce the issue, find the root cause, fix it, and tell you what was wrong.
For larger refactoring or architecture work, message me first so I can review the scope.
14+ years of iOS experience with Swift, SwiftUI, UIKit, and Objective-C. I've shipped 40+ apps, including a fitness app used by 2.7M people.
Most single-bug fixes are delivered within 24-48 hours. I get oriented in an unfamiliar codebase fast - and every change is reproduced, reviewed and tested by me on a real device before delivery.
Common issues I fix:
• App crashes and crash log analysis (EXC_BAD_ACCESS, SIGSEGV)
• Xcode build, signing, and dependency errors
• Swift and SwiftUI bugs and layout issues
• UI freezes, slow scrolling, and performance problems
• Memory leaks and retain cycles
• App Store rejection and submission problems
• Push notifications, StoreKit, and subscription issues
• Bugs that appeared after an iOS or Xcode update
• AI-generated iOS apps that no longer build or run
I don't patch symptoms - I reproduce the issue, find the root cause, fix it, and tell you what was wrong.
For larger refactoring or architecture work, message me first so I can review the scope.
Platform
iOSApp Type
Native AppDevelopment Technology
Swift, Objective-CApp Purpose
Chat, Health & Fitness, Kids, Lifestyle, Maps & Navigation, Music, Productivity, Social Networking, Streaming, TravelExpertise
Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$249
|
Standard
$499
|
Advanced
$899
|
|---|---|---|---|
| Delivery Time | 2 days | 5 days | 10 days |
Number of Revisions | 1 | 2 | 2 |
Bug Investigation | |||
Fix Documentation | - | - | - |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$100 - $400
Additional Revision
+$100
Fix Documentation
(+ 1 Day)
+$100
iOS Code Review
(+ 2 Days)
+$199
Additional Bug Fix
(+ 1 Day)
+$99Frequently asked questions
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CH
Charlie H.
Sep 1, 2026
iOS Support for Mobile Fitness App
Great mobile partner, excited to work with Mikhail again.
AS
Alexey S.
Mar 18, 2026
Need help developing a macOS application (MVP).
LS
Loop S.
Feb 1, 2026
Fix and Finish Vibecode iOS App
Good work
AN
Aaron N.
Mar 6, 2025
iOS Engineering and rapid prototyping
ZG
Zainab G.
Dec 22, 2024
iOS Engineering Support
About Mikhail
Senior iOS Developer | Swift, SwiftUI, macOS, AI/LLM | 2.7M+ Users
100%
Job Success
Batumi, Georgia - 7:29 pm local time
Native iOS and macOS in Swift, SwiftUI, UIKit and Objective-C. I take ownership of production codebases: at one client my code survived 5 months and 184 commits by other engineers at 91% intact; at another, 43% is still in production 7 months after handover.
Recent work:
• Built the core health logic for an AI coach using HealthKit, OpenAI function calling, vector search, and custom health scoring.
• Implemented 60 FPS pose detection for real-time workout feedback.
• Built a macOS meeting assistant with system audio capture, Whisper transcription, AI summaries, and action items.
• Built live sports features including predictions, polls, leaderboards, live stats, and video calls for broadcasts with 30,000 concurrent viewers.
• Migrated large Objective-C/UIKit codebases to Swift and SwiftUI while keeping regular production releases.
I can help with:
• macOS applications in SwiftUI and AppKit
• AI integration: OpenAI, function calling, streaming, Whisper, vector search, and on-device ML
• Modernizing legacy Objective-C applications without pausing releases
• Swift 6 migration: strict concurrency, removing data races, async/await
• Native iOS development in Swift, SwiftUI, UIKit, and Objective-C
• HealthKit, Apple Watch, fitness, and wellness apps
• Camera, audio, video, AVFoundation, and real-time processing
• StoreKit 2, RevenueCat, subscriptions, and paywalls
• Firebase, Supabase, REST APIs, and GraphQL
• Performance optimization, crash fixing, and App Store releases
Send me a short description of your project, and I'll suggest a practical first milestone.
Steps for completing your project
After purchasing the project, send requirements so Mikhail can start the project.
Delivery time starts when Mikhail receives requirements from you.
Mikhail works on your project following the steps below.
Revisions may occur after the delivery date.
Analyze the issue
I review the code, logs, and project setup to find the root cause of the problem.
Implement the fix
I update the code, test the solution, and make sure the issue is resolved.