I'm not aware of any automatic solution like zapadd.

In clients like Primal / Amethyst you can set up default Zap value and make it zap with just a single tap, then you can connect your wallet with NWC (with primal you don't have to, but you can).

You can then add a default message for the zap and then you just need to open a bunch of profiles and then tap once on each of them and they get your e.g. 1000 sats with the message.