This app was mentioned in 5 comments, with an average of 0.60 upvotes
You should be using Womi Word Search (sometimes called green word search) instead of the first party one. This one is more stable.
As for the setting use the 2 words 16 second.
you forgot the womistudios apps, specifically the word search that is "semi passive" sometimes you get a point, sometimes you don't. https://play.google.com/store/apps/details?id=com.wordsearch.aphone
all in all, there are 30 apps in the play store that give you perk points - if you search for perk, they should be the first 30 in the list - but i have tested a few of them and they are not passive - perklinko is not passive by any means, discoball is also not passive - and there are others but i haven't had time to test them they are made by WOMI Studios
click on quick play / 2 points. also, use womi word search app and you can put more devices on it.
https://play.google.com/store/apps/details?id=com.wordsearch.aphone&hl=en
yeah, its a different app thats basically the same https://play.google.com/store/apps/details?id=com.wordsearch.aphone&hl=en