UPDATE
I bought the template the has this function built-in from the the original author, and it cannot be used separately from the template because of the js being obfuscated.
It is permissible to deobfuscate the js and keep it for personal use according to the CC BY-NC-ND 4.0 DEED, but given the fact that the author claimed to have the capacity to de-activate users if the number of the active devices are beyond limit, it might not be encouraged.
I am sorry that I cannot distribute the js because the author specified in the blog that he didn’t want the buyers to distribute the template.
FYI, the blog is in Chinese, and I think the payment method is not widely used by anyone outside of Mainland China, so if you are interested in the project, for personal or commercial usage, you could also find the author on Github.
OP
I found this script but unfortunately it stopped working after ankimobile 2.0.81, and now i am wondering if there is a way to make this work on ankimobile again.
Here is the script:
// flipToBack reference to https://github.com/git9527/anki-awesome-select
function flipToBack() {
if (typeof pycmd !== "undefined") {
pycmd("ans")
} else if (typeof study !== "undefined") {
study.drawAnswer()
} else if (typeof AnkiDroidJS !== "undefined") {
showAnswer()
} else if (window.anki && window.sendMessage2) {
window.sendMessage2("ankitap", "midCenter")
}
}
Here is the code to ankimobile 2.0.88 just in case someone wants to check it out.