I once heard someone say this: "Is it normal to have to open a messenger just to copy and paste? Everyone uses it that way, so they don't even realize how inconvenient it is. But having to open a messenger just to copy-paste between devices—that's not normal. It's incredibly inconvenient, it's seriously bad for privacy" and so on and so forth.
They said they searched everywhere for an app that solved this problem, but found nothing. Their argument was that people aren't not inconvenienced by it—they just don't realize how inconvenient it is, they're using it out of sheer habit. And then they said they were going to solve it and were looking for investment.
I strongly agreed with the core problem itself. But I wondered in this day and age, does solving this really require investment and dedicated developers? So I just made it myself using AI.
I figured Nostr would be a great fit, so I decided to use it as an opportunity to help spread Nostr too. Everything—encryption and message delivery—relies on Nostr. For cross-device login, I used Amber, so that even on a fresh start, users don't have to manually transfer anything. The relays also automatically detect and switch to the user's preferred relays.
While building it, I found out that these kinds of tools do actually exist. I'd been told there was nothing, so I went ahead and made it—lol. But I'm using it and it works well for me. And in some respects, mine seems better than the existing alternatives. So I thought that with a bit of promotion, I could probably get a decent number of users.
A clipboard sync tool is something that non-technical people would find useful. I figured if the distribution process weren't such a pain, there might actually be demand. So right now I'm only distributing through Zapstore, but I decided I should also put it on the Google Play Store and promote it to regular users. I started building an onboarding page for general users...
...and that's when I discovered that Amber isn't on the Play Store.
Which means, for a regular user to use this:
They have to manually dismiss all kinds of warning messages and install Zapstore themselves.
They have to install Amber and create a key.
They have to install my app and log in via NIP-46.
That's the barrier. And if I want to avoid that, I'd have to let them install via a direct APK from GitHub. So I just gave up on promoting it to general users.

Zapstore
ClipRelay — Zapstore
Automatically syncs clipboard between your devices. All communication goes through Nostr relays, encrypted with NIP-44. Authentication via NIP-46 b...

3 hop 0 fee
first time seeing something like this