When you say implements stickers, does that mean it has a way to create your own sticker packs? Element technically has stickers but you only have the ability to use the quite bad built in stickers unless you host your own server and I assume manually configure it with the stickers you want.

It just puzzles me how stickers were implemented in Matrix years ago but they stopped just before allowing users to create sticker packs which makes them almost useless.

The problem is, like almost all third party matrix clients, its missing a lot of features.

No voice calls, no widgets and other things.

If Cinny had link embeds and the ability to play videos from links, it would be basically perfect.