The main app is good and does what it says as advertised. However, the backup feature doesn't work. I selected "Android backup" which is supposed to backup my account "when the phone is idle and plugged in". Except that it's been over 1.5 weeks and it still hasn't backed up. There needs to be a way to force a backup or to schedule it at a particular time. I even went into my phone settings to stop the OS from shutting the app down to save battery. When this gets fixed, I'll be happy to give the app a 5 star review, but without a backup it makes it very hard to use.
Bestes App. GENIAL. Für einen Laien ist die ID- und Daten-Backup zu kompliziert. Schade ist die Durchdringung bei den Smartphone Nutzern klein. Das ist der einzige Wermutstropfen. Hatte Mühe mit meinem Xiaomi Mi Mix die Push Nachrichten zu bekommen. Aber der Support ist top, 3 Antworten an einem Sonntag. Das Problem lag schliesslich an einem Bug von Xiaomi, res. einer verdeckten Einstellung vom Gerät. DAS RUNDE ICON IST POTTHÄSSLICH. KATASTROPHE.
I love this app, it allows me to stay in touch with friends all over the world who cannot access Line of Skype. But I tried to open the app and check my messages this morning but I kept getting the "Damaged database or incomplete data. Cannot launch." warning, even after reinstalling the app...
Disappointed - I still use whatsapp that means this app has failed for me. If after purchase I have to market my friends then I stand solo with a purchase and the only thing I get is the developers messages. On purchase I did a test run usage with my wife just to keep our messages private unfortunately those messages only reach her after 2 days. I believe this app should be free for download and the developers can monetize service packages. But till then I think getting a refund seems a smart option.
It's very nice that Threema generates an ID that can be used without linking your phone number. So it works perfectly fine on my tablet:-) a feature for encrypted phone calls is the only feature missing to make this app perfect.
It seems pretty secure to me and the media coverage. I'd complain about the closed source-ness. But it's already not bad.
* Bug fixes
#1 messenger app used by millions of people with lots of custom options.