Usability
Interface 
User-friendliness/complexity of the tool´s interface
Straightforward, intuitive.
Time efficiency Time needed for mastering the „how-to“ of the tool and a production of a task
Very high.
Interface language(s) The number of languages in which the tool is currently available/adaptable to
Over 15 languages.
Respect for privacy Does the tool require registration? Who can see my data? Can I remain anonymous?
Medium/high. Luvvoice collects personal information such as name, username, email address, IP address and browser type, usage data and payment information if applicable provided when signing up to Luvvoice; comments, media, or content embedded from other websites by users; together with cookies for functionality and usage purposes. Luvvoice does not provide information on data sharing with third parties. It retains data for as long as necessary and then is deleted or anonymised, but more details are unfortunately not provided. Luvvoice states having appropriate technical and organisational measures for data security including encryption, access controls and security audits. It might transfer data outside the EEA, although appropriate safeguards are in place. Luvvoice acknowledges users’ rights to access, rectify, erase, and restrict the process of their data, among others. At least, for EEA users, it states compliance with the GDPR. See more here and here.
Saving work for future use Possiblity to save your or others´ work for reuse/reproduction
Yes, with an account, or without an account downloading files into MP3.
Tailorability (If so, how?) Possibility of the tool to be used for a range of different activities (e.g. to what extent you can organize a project assignment with a central activity based on this tool)