FiftyThree Opens Pencil Stylus to Third-Party Apps with New SDK
FiftyThree, the innovative company behind the popular Paper creativity app and Pencil stylus, has taken a major step toward expanding its ecosystem. The company has released a software development kit (SDK) that allows third-party developers to integrate Pencil’s advanced functionality into their own creative applications.
A Long-Term Vision Realized
According to FiftyThree developer Ian MacDuff, this move fulfills the company’s original vision. “From the beginning, we wanted Pencil to work with multiple apps, not just Paper,” MacDuff explained in an interview. Despite initially launching as a Paper-exclusive accessory, Pencil has exceeded sales expectations—even with its limited compatibility.
Key Features Now Available to Developers
The FiftyThree SDK brings Pencil’s signature capabilities to third-party apps, including:
- Seamless pairing for instant connectivity
- Advanced palm rejection for natural drawing experience
- Surface pressure sensitivity (recently added in a major update)
Strategic Benefits for Users and Developers
This expansion offers significant advantages:
- For existing Pencil owners: More functionality across multiple apps
- For new users: Greater incentive to purchase the stylus
- For developers: Access to premium stylus technology
Launch Partners Showcase Potential
Three notable apps have already integrated Pencil support:
- Procreate: Professional-grade digital illustration
- Noteshelf: Handwritten note-taking solution
- Squiggle: Innovative music creation app
Open Ecosystem Approach
FiftyThree is actively encouraging more developers to adopt the SDK. While requiring a license agreement, the company maintains an open stance—even toward apps that might compete with Paper. “Our goal is to help users get more value from Pencil,” MacDuff emphasized.
Device Compatibility
The Pencil stylus works with:
- iPad 3 and newer models
- iPad Mini (all generations)
- iPhone 4S and later devices
This strategic move positions Pencil as a versatile tool for creative professionals and hobbyists alike, potentially expanding FiftyThree’s market reach significantly.
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