Yevhenii Petrenko
iOS developer — UIKit, SwiftUI, AI-powered consumer apps.
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ChecQ — AI Receipt Scanner & Warranty — an iOS app that turns a photo of a paper receipt into structured data. Built solo, end-to-end, and shipped to the App Store. Snap a receipt and AI reads the store, date and every line item with its price. From there the app tracks warranty countdowns on warrantable purchases, counts down store-specific return windows, and breaks spending down at item level — groceries vs health vs household, not just "$143 at Target". Built as a privacy-first alternative to bank-syncing budget apps: no account linking, receipts stay on device, core flows work offline. Also built a voice-driven shareable grocery list, local notification scheduling for expiry alerts, and PDF/CSV export. Native UIKit, StoreKit 2 subscriptions, 33 languages.
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A text-to-image wallpaper generator for iPhone, built solo and shipped to the App Store. Describe an idea, pick a style, get an original 4K wallpaper in seconds — across a library of art directions from anime to minimalism. Built an async generation queue with progress and failure recovery, device-aware output sizing for lock and home screens, a prompt generator for users who don't know what to ask for, and StoreKit 2 subscriptions. My longest-running product: 11 releases over 10 months, iterating on generation quality and latency. Native UIKit, 33 languages, custom icon.
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Voice Journal: AI Diary & Mood — a voice-first journaling app for iPhone. Built solo, end-to-end, and shipped to the App Store. Record 1–3 minutes of speech and it comes back as a structured journal entry: OpenAI Whisper handles transcription, then AI post-processing organizes the raw transcript into a titled entry with tags and detected mood. Smart extraction pulls to-dos and ideas out of the stream of consciousness into their own screens, and a weekly digest summarizes themes and progress. Built the audio capture pipeline, the transcription and AI structuring flow, mood timeline with calendar and streaks, and a consent-gated data flow documented for App Privacy review.
Native UIKit, AVFoundation, StoreKit 2 subscriptions.
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QR Code: Generator & Creator — a native iOS utility for creating, styling and
scanning QR codes and barcodes. Built solo, end-to-end, and shipped to the App Store.
The category is crowded with apps that either generate ugly codes or hide basic features behind a paywall. I built for the gap in the middle: full visual control over the code, plus a guarantee that the styled result still scans.
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