I was asked to purchase the Official edition of Smart Life App SDK on the Tuya Developer Platform. Can I use the originally free SDK versions in the app development?

Currently, all new SDK-based apps on the platform are built based on Smart Life App SDK (v4.0 and later) that requires an annual subscription. Legacy free SDKs (earlier than v4.0) are not supported in the app development. The Trial edition is available for free, but it supports only up to 20 registered end users in total.

Note: If you have created apps with the Smart Life App SDK earlier than August 26, 2022, these SDKs can still be used for free. You can also purchase an annual subscription and upgrade to the SDK version v4.0 or later. If you do not require this upgrade, do not click the **Upgrade** button next to your SDK-based app, as shown in the following figure.

For more information about the differences between the Trial and Official editions of the Smart Life App SDK, visit: Differences in features between Trial and Official editions.