An Android adaptation of the Lone Wolf "New Order" subseries (books 21-32): if you're looking for books 1-20, Lone Wolf Saga is what you need. Lone Wolf New Order currently covers books 21-29: book 30 (Dead in the Deep) is still available for sale in paper format and not covered by the Project Aon licence. Dever died in 2016, so the future of unpublished books 31-32 is unknown.
You play as a new protagonist, a student of the original Lone Wolf who sends you out on missions around Magnamund to fight evil. The app is not quite as polished/bug-free as Lone Wolf Saga but still works great, a must-download for anyone who wants to see further adventures after completing the original Lone Wolf's story arc.
Tiny Twine scifi-horror: well-written, with very effective descriptions of the 'kills'. The twist in the tale has been done before, 20 years ago in fact, but remains pretty effective in 2020.
Unlike Taylor, the fun protagonist you talk to and advise in Lifeline, Silent Night, and Halfway to Infinity, Wynn in Flatline is an annoying and whiny nuisance. Complaining, ignoring your choices, and, taking minutes to perform the simplest of actions (opening a door?). The story does expand the Lifeline universe in an interesting way, answers some lingering questions from Taylor's games, and the heart-rate monitor is a neat new mechanic, but it's still a bit of slog to get through.
One part of the game requires you to access an external website to get some codes: that website is now shut down. You can now get the codes from https://pearsoncorp.green/ or https://twitter.com/Lifeline_Server/status/1076294978190622721