Ask HN: NSA-resistant mobile sexting apps?

[promiscuousmode]

I'm a minor hacktivist and may be on a few watch lists. Very soon my partner and I will spend some time apart. What mobile applications are there for sending multimedia messages (photos, videos, text) on mobile platforms that provide at least some assurance of data expiry / privacy than say whatsapp or path provide?

We are on a mobile platforms that run some closed source code so we understand that we will not be able to obtain NSA-proof sexting. Hence, "NSA-resistant".

[steffex]

telegram.org does device-to-device encryption without cloud storage

[promiscuousmode]

appears to be cloud based, from the description?

[steffex]

do some more reading on this url: https://telegram.org/faq#secret-chats

[promiscuousmode]

thanks. (for future ref: link mentions selecting a secret chat avoids messages being stored on telegram servers and enables end-to-end encryption between devices)