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Best Catalystwo Apps

50+ iOS apps curated and reviewed

4.2 avg rating
13 free apps
Updated May 2026

Finding the right catalystwo app can be overwhelming with so many options. We've analyzed 50+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.

Top Picks for Catalystwo

CCal 11 Lite#1

CCal 11 Lite by Catalystwo Limited

Sync with Google Calendarβ„’
Editor's Choice
πŸ“Š Productivity
4.7😊(578 ratings)
FreeAdsIn-App Purchases
CCal 11 Lite screenshot 1
CCal 11 Lite screenshot 2
CCal 11 Lite screenshot 3
CCal 11 Lite screenshot 4

An intelligent calendar app for efficiently managing your schedule. Easily create, modify, and organize events with drag-and-drop functionality, customizable colors, and support for international time zones. Offers undo/redo and copy/paste features for seamless event management.

What We Love

  • πŸš€ Highly customizable
  • 🌈 Excellent color coding and visual organization
  • πŸ“† Seamless Google Calendar integration
  • πŸ—“οΈ Detailed month/week/day views

Room to Improve

  • πŸ› Sync issues with Google Calendar
  • πŸ“’ Intrusive ads in free version
  • πŸ•°οΈ Time zone issues when traveling
Sketch Pad 3#2

Sketch Pad 3 by Catalystwo, LLC

Unlimited Canvas
Strong Contender
πŸ“Š Productivity
3.0😊(33 ratings)
FreeAdsIn-App Purchases
Sketch Pad 3 screenshot 1
Sketch Pad 3 screenshot 2

This app provides an unlimited digital canvas for doodling, sketching, drawing, and note-taking. It offers various pen sizes, colors, editing tools like cut and paste, and export options to multiple platforms. Work is automatically saved for easy continuation.

What We Love

  • πŸš€ Rename files
  • πŸ‘ Nimble and intuitive UI
  • πŸ‘ Brilliant
  • πŸ‘ Great and handy

Room to Improve

  • πŸ› Ads cover toolbar to make it unusable
  • πŸ› Dropbox sync not working
  • πŸ› Revert!!!! (Pinch zoom broken)
Dictionary#3

Dictionary by Catalystwo, LLC

in Widget
Worth Considering
πŸ” Reference
3.8(4 ratings)
FreeAds
Dictionary screenshot 1

Instantly look up words from your iOS Home Screen without opening the app. Get definitions in seconds to aid studying, reading, or satisfying curiosity, keeping you focused and learning.

More Catalystwo apps to explore

4
FastFinga 3 with ads
FastFinga 3 with ads
FastFinga 3 with ads
by Catalystwo, LLC
Free

Create handwritten notes, personalized emails, and social media posts with this versatile app. It offers extensive customization for pens, backgrounds, and fonts, and integrates with cloud services for easy sharing and organization.

Handwritten notes and emailsPersonalized social media postsSketch Pad integration
πŸ“Š Productivity
(6)
free with in-app purchases
5
Quick Notes Widget
Quick Notes Widget
Quick Notes Widget
by Catalystwo, LLC
Free

Quickly create and display notes directly in your device's notification center. Access your important reminders and thoughts anytime without opening the app.

Display notes in Notification CentreAccess notes from widgetEasy note creation
πŸ”§ Utilities
(5)
free with in-app purchases
6
Handwriting Keyboard
Handwriting Keyboard
Handwriting Keyboard
Turn your handwriting to text
$3.99

Effortlessly convert your handwritten notes into typed text across any application. This keyboard works offline, supports Apple Pencil, and offers customizable input settings for a seamless user experience.

Handwriting to text conversionWorks in any appOffline functionality
πŸ”§ Utilities
(93)
free
7
CCal 11 Pro
CCal 11 Pro
CCal 11 Pro
by Catalystwo, LLC
$3.99

An intelligent and elegant calendar app designed for efficient schedule management on iOS devices. It offers intuitive drag-and-drop event manipulation, customizable backgrounds, and support for over 400 international time zones.

Drag & drop event creation and modificationCustomizable background colorsSupport for over 400 international time zones
πŸ“Š Productivity
(85)
paid
8
AirKey
AirKey
AirKey
by Catalystwo, LLC
Free
πŸ”§ Utilities
(0)
9
FastFinga 3
FastFinga 3
FastFinga 3
by Catalystwo, LLC
$9.99

Create handwritten notes, personalized emails, and social media posts with this versatile app. It offers extensive customization for pens, backgrounds, and fonts, and allows easy sharing to cloud services and social media.

Handwritten notes and emailsCustomizable pens and colorsInsert photos and emojis
πŸ“Š Productivity
(7)
paid
10
mem
mem
mem
SRS Leitner System
$4.99

This app implements a spaced repetition system using flashcards to aid memorization. Users can add new cards, review them at increasing intervals, and move them between compartments based on recall success. It offers features like Dropbox synchronization, night mode, and audio pronunciation.

Spaced repetition systemFlashcard creation and reviewCompartmentalized learning
πŸ” Reference
(22)
paid
11
Speak Me
Speak Me
Speak Me
by Catalystwo, LLC
$7.99

This app allows users to communicate by writing on a screen, which is then spoken aloud. It's useful for individuals with speech difficulties or those learning English or Japanese, offering handwriting recognition, text typing, and a dictionary.

Handwriting recognition to speechText typing inputDictionary with definitions
πŸ“Š Productivity
(1)
paid
12
PictureWall
PictureWall
PictureWall
by Catalystwo, LLC
Free

Create a personalized photo gallery on your iPhone by selecting frames and wallpapers. Arrange your favorite images and enjoy your memories with this simple photo organization tool.

Create personal photo galleriesSelect from multiple framesChoose custom wallpapers
πŸ“· Photo & Video
(12)
free
13
AB Player
AB Player
AB Player
by Catalystwo Limited
Free

This app is a music player designed for language learners and students of study material. It offers features like A-B repeat playback, adjustable speed, and clip saving to aid in comprehension and practice. Easily share audio clips with others for collaborative learning.

A-B repeat playbackAdjustable playback speedSave and share audio clips
πŸ“š Education
(13)
free with in-app purchases
14
PocketWatch - 3D Clock
PocketWatch - 3D Clock
PocketWatch - 3D Clock
by Catalystwo, LLC
$0.99

This application offers a realistic 3D analog watch experience, displaying the date and day of the week. Users can interact with the clockwork mechanism, zoom in and out, and even dismantle the watch to explore its inner workings. Adjust animation speed and display options for a personalized view.

3D analog watch displayShows date and day of the weekInteractive clockwork mechanism
🌟 Lifestyle
(1)
paid
15
Eco Cat App
Eco Cat App
Eco Cat App
Ecotrade Group
Free

This app provides a comprehensive catalog of over 20,000 catalytic converters, allowing users to look up their value by car brand or manufacturer. It offers accurate appraisals based on precious metal content analysis and helps sellers negotiate fair deals.

Catalytic converter price catalogSearch by car brandSearch by manufacturer
πŸ’Ό Business
(1.8K)
free with in-app purchases
16
Auto Catalyst Market Catalog
Auto Catalyst Market Catalog
Auto Catalyst Market Catalog
Catalytic Converter Database
Free

This app serves as a comprehensive catalog for catalytic converters, allowing users to buy, sell, and determine their real-time value based on precious metal content. It features a vast database with detailed specifications and photographs to aid in identification and valuation.

Buy or sell catalytic convertersDetermine real cost based on Pt, Pd, Rh quotesAccess complete catalyst specifications
πŸ’Ό Business
(51)
free with in-app purchases
17
η­†θ«‡γƒ‘γƒƒγƒˆ
η­†θ«‡γƒ‘γƒƒγƒˆ
η­†θ«‡γƒ‘γƒƒγƒˆ
by Catalystwo, LLC
$0.99
πŸ“Š Productivity
(4.7K)
18
Cat DB – Catalytic Converters
Cat DB – Catalytic Converters
Cat DB – Catalytic Converters
Scrap catalyst marketplace
Free

This app provides comprehensive pricing and identification tools for catalytic converters. Search by VIN, make/model, or partial codes, and access detailed photos and 3D models to confirm authenticity and aid removal. It connects users with buyers and offers live market pricing.

Search by VIN or vehicle year/make/modelSearch by partial or full catalytic converter codeSearch by 28+ spec filters without a code
πŸ” Reference
(67)
freemium
19
六法
六法
六法
by Catalystwo Limited
Free
πŸ” Reference
(15)
20
Cards: Draw, Sketch, Organize
Cards: Draw, Sketch, Organize
Cards: Draw, Sketch, Organize
Handwritings, Texts and Photos
Free

Create digital flashcards to memorize information, organize notes, and store images. Arrange your cards on a virtual desktop for a clear overview. Ideal for studying, planning, or keeping track of important details.

Create digital flashcardsMemorize informationOrganize notes and photos
πŸ“Š Productivity
(0)
ad-supported

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