i feel like a secure messaging app should be OS in the first place though ?! textsecture / smssecure has been walking a slow and steady pace forward for years now, to me it seems like a project with vision/smart people that is worth putting resources into in wake of this one dying, if the product is something you are interested and believe in.
There's no excuse not to open source an app if it's privacy oriented. It's not enough to open source the part that does the crypto either, because how do you know it isn't accidentally logging plaintext data to a file somewhere before the crypto happens?
There are other ways to do lock-in besides closed-source clients. If it has "private" or "crypto" anywhere in the title, it needs to be open source.
