MarcX Studio

Mobile Product Studio

MarcX Studio

MarcX Studio builds practical apps for everyday tasks: keep loyalty cards ready, practice spelling and number listening, and make Mac audio easier to control.

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Apps

Loyalty card wallet

RooCards

iPhoneAndroid
RooCards is the MarcX loyalty card wallet for store cards, rewards cards, memberships, barcodes, and QR codes. Open cards faster from the app, widgets, Spotlight, Apple Wallet on iPhone, or a clean scan-ready display. Explore RooCards
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English number listening practice

NumListen

iPhone
Train your ear for spoken numbers in 8 languages. Listen on iPhone, then type the Arabic digits you hear. Explore NumListen
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Spelling Practice App

Snap Spell

iPhone
Snap Spell turns real school word lists into read-aloud spelling practice on iPhone: Solo Test, Auto Dictation, Tricky Words review and a weekly report. No ads. Pro adds Natural voices and more. View Snap Spell
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Chinese idiom puzzle for iPhone

成语拾光

iPhoneiPad
成语拾光 (Idiom Shiguang) is a calm Chinese idiom puzzle game for iPhone: connect four neighboring character tiles to spell a chengyu, with a daily puzzle, 1,700+ levels, pinyin and Chinese definitions. No ads, plays offline. Explore 成语拾光
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Chinese-English Bible reader

VerseLume

iPhoneiPad
VerseLume is a calm Chinese-English Bible reader for iPhone and iPad, with parallel Scripture, search, saved passages, listening, and Bible-focused Pro AI powered by Apple Intelligence on supported devices. Coming soon for iPhone and iPad Explore VerseLume
Mac microphone volume utility

Auto Ducking

Mac
Auto Ducking is a Mac microphone volume utility that lowers background audio when your mic becomes active, then restores volume when microphone use ends. View Auto Ducking
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Loyalty card wallet

RooCards

RooCards is the MarcX loyalty card wallet for store cards, rewards cards, memberships, barcodes, and QR codes. Open cards faster from the app, widgets, Spotlight, Apple Wallet on iPhone, or a clean scan-ready display.

  • Store loyalty, store, rewards, and membership cards with clean barcode and QR code display.
  • Use fast access surfaces including card-grid widgets, scan-ready barcode and QR widgets, Spotlight, and Apple Wallet for eligible cards.
  • Add cards by scanning, manual entry, or bulk import from saved screenshots.
Explore RooCards Privacy Policy
Loyalty card wallet app home screen Clean barcode and QR code display for scanning loyalty cards Import loyalty card details from photos

English number listening practice

NumListen

Train your ear for spoken numbers in 8 languages. Listen on iPhone, then type the Arabic digits you hear.

  • Practice teen vs ty, basic numbers, phone numbers, prices, dates, codes, decimals, and percentages.
  • Hear spoken numbers and type digits with format-specific templates.
  • Use replay, Show Answer, settings, and lightweight progress tracking.
NumListen iPhone app screen for spoken-number listening practice with digit input. NumListen iPhone app screen for spoken-number listening practice with digit input. NumListen iPhone app screen for spoken-number listening practice with digit input.
Explore NumListen Privacy Policy

Spelling Practice App

Snap Spell

Snap Spell turns real school word lists into read-aloud spelling practice on iPhone: Solo Test, Auto Dictation, Tricky Words review and a weekly report. No ads. Pro adds Natural voices and more.

  • Hear it, spell it, know right away
  • Auto Dictation, even with the screen locked
  • Missed words come back in Tricky Words
Snap Spell scanning a printed Week 6 spelling list and showing the recognized words for review before saving. Snap Spell voice settings with Natural voices Jenny, Andrew, Libby, Ryan, Natasha, and William, and the Apple voice option.
View Snap Spell Privacy Policy

Mac microphone volume utility

Auto Ducking

Auto Ducking is a Mac microphone volume utility that lowers background audio when your mic becomes active, then restores volume when microphone use ends.

  • Lowers Mac system volume when your microphone becomes active.
  • Restores the previous volume automatically when microphone use ends.
  • Adds presets, app rules, fade timing, hotkeys, and output-device memory.
Mac mic ducking that lowers background audio while you speak. Mac mic ducking that lowers background audio while you speak.
View Auto Ducking Privacy Policy

Updates & Guides

Snap Spell ·

Snap Spell 2.0: Auto Dictation, Tricky Words and No Ads

 RooCards ·

RooCards Adds Apple Wallet Support on iPhone

 RooCards ·

Use Widgets and Spotlight Search for Faster iPhone Card Access

MarcX Studio

How we build

Each MarcX app starts with one recurring task and stays focused on making it easier.

One clear job

Each app is built around a task you return to often.

Straightforward to use

The essentials are easy to find, without unnecessary steps.

Stay focused

We keep each product focused instead of trying to do everything.

MarcX Studio

For app support, privacy questions, or product feedback, contact MarcX Studio.

Contact Updates & Guides