---
title: Swift-SDK - 3.7.1
slug: feature-experimentation/release-notes/swift-sdk-3-7-1
docTags: 
createdAt: 2026-07-20T15:45:37.924Z
---

## 3.7.1

April 14, 2021

### New Features

- DatafileHandler can be customized and set when OptimizelyClient is instantiated. (\[#384]\([https://github.com/optimizely/swift-sdk/pull/384](https://github.com/optimizely/swift-sdk/pull/384)))
- Add watchOS Compatibility. (\[#390]\([https://github.com/optimizely/swift-sdk/pull/390](https://github.com/optimizely/swift-sdk/pull/390)))

### Bug Fixes

Clean up build and lint warnings. (\[#397]\([https://github.com/optimizely/swift-sdk/pull/397](https://github.com/optimizely/swift-sdk/pull/397)))

[https://github.com/optimizely/swift-sdk/releases/tag/v3.7.1](https://github.com/optimizely/swift-sdk/releases/tag/v3.7.1)