As of , Atlas continues to be updated faster than Toolbox Premium. The 1.21.21 build is stable, but expect a new release when Minecraft hits 1.22 (or whatever comes next).
The client integrates several utilities into a single APK, which are accessible through an in-game pause menu. HUD Customization : Includes a Heads-Up Display (HUD) manager Atlas Client 1.21.21- 1.21 Apk Toolbox Premium
Unlocking Excellence: A Guide to Atlas Client and Toolbox for Minecraft PE 1.21 For players on Minecraft: Bedrock Edition As of , Atlas continues to be updated
The term "Toolbox Premium" refers to the client’s unlock of all paid/pro features typically found in standard Toolbox—completely free. Atlas Client 1.21.21- 1.21 Apk Toolbox Premium