Questions:
Encryption: Is there any? I see that there is a password option, but does that lock the file or is that just to access the file itself.
Deletion: I see there are options related to the time the file can exist, but what are my guarantees that the file indeed will be deleted.
Selfhosting: Is this a venture you are offering to the public, or will there be an option to selfhost?
Please understand, I'm not trying to shit on your project. However, if there is no encryption, and no real guarantee the file will self destruct, I'd be hard pressed to use your service, unless it has a selfhosted option. It does look like there are some good options. I like the ability to tag a note for the recipients. The tor option is good too. Looks like you've put some time in on it. Polish it up, get some encryption options, and release the code on Github or equal so everyone view it and can make up their mind to use or not.
Thank you for sharing.