# Optimystic: open-source visual acuity app built with SwiftUI

**URL:** <https://forums.swift.org/t/optimystic-open-source-visual-acuity-app-built-with-swiftui/89265>\
**Category:** Community Showcase\
**Tags:** generics, swiftui, watchos\
**Created:** [August 29, 2026, 2:45am UTC](https://forums.swift.org/t/optimystic-open-source-visual-acuity-app-built-with-swiftui/89265 "2026-08-29T02:45:13Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![nayanbhatia311](https://sea2.discourse-cdn.com/swift/user_avatar/forums.swift.org/nayanbhatia311/32/46430_2.png) [@nayanbhatia311](https://forums.swift.org/u/nayanbhatia311)\
**Post date:** [August 29, 2026, 2:45am UTC](https://forums.swift.org/t/optimystic-open-source-visual-acuity-app-built-with-swiftui/89265/1 "2026-08-29T02:45:14Z")

</div>

Rebuilt **Optimystic** , a visual-acuity testing app my team originally made as an undergrad project in 2019–20.

This version is a native iOS/SwiftUI rebuild and can run on one device, pair two Apple devices as controller + chart, or use an Apple Watch as a remote. Everything stays local with no accounts or backend.

I wasn’t able to get it through App Store review because of the organization requirements around health-related apps, so I’ve open sourced it instead. You’ll need to build it locally in Xcode for now.

Would appreciate any feedback on the code, bug reports, or contributions.

GitHub: [https://github.com/nayanbhatia311/optimystic-visual-acuity](https://github.com/nayanbhatia311/optimystic-visual-acuity?utm_source=chatgpt.com)  
Prototype video: [https://optimystic-mva.netlify.app/](https://optimystic-mva.netlify.app/)

Not a medical device or substitute for professional eye care.