MarcX Studio

Independent app studio for loyalty cards, spelling practice, English number listening, and Mac audio control.

MarcX Studio is an independent app studio building focused iOS, Android, and macOS apps for practical everyday tasks. Products include: • RooCards — a loyalty card wallet for store cards, rewards cards, membership cards, barcodes, and QR codes. • Snap Spell — a spelling practice app that turns school word lists into repeatable exercises and progress tracking. • NumListen — an English number listening app for phone numbers, prices, dates, decimals, codes, and other real-world number formats. • Auto Ducking — a Mac audio utility that automatically lowers background audio when the microphone is active and restores it afterward. MarcX Studio focuses on simple workflows, clear interfaces, and purpose-built tools instead of oversized all-in-one software.