---
title: "SDK migration guide"
description: "Migration guides for Unity Adapty SDK."
---

## Migration Guides

### [Migration guide to Unity Adapty SDK 3.x](unity-sdk-migration-guides)

Learn how to migrate from older versions to Unity Adapty SDK 3.x.

## What's New

### Version 3.x

- Enhanced paywall presentation
- Improved error handling
- Better C# support
- Performance optimizations

### Version 2.x

- New onboarding features
- Enhanced analytics
- Improved purchase flow
- Bug fixes and stability improvements

## Breaking Changes

### Version 3.x

- Updated observer API
- Changed paywall presentation methods
- Modified error handling structure

### Version 2.x

- Updated onboarding API
- Changed profile structure
- Modified purchase flow

## Migration Checklist

When migrating to a new version:

- [ ] Review breaking changes
- [ ] Update API calls
- [ ] Test all functionality
- [ ] Update error handling
- [ ] Verify analytics tracking
- [ ] Test on all platforms