Here are some with forced transfotmation, there are all html games, so you should be able to play them on android.
Perverted Education Probably the best in this specific niche. Has the most likes on tfgames.site for a reason. Teacher blackmails you into doing naughty things and transforms you with the eventual help of a Therapist and your Mother/Babysitter. Text-based.
Secretary is another good one. You get demoted to Secretary after a fuck-up and have to deal with a demanding new boss. Text-based with 2D art.
Sissy Girlfriend Experiment relatively new, but quite good. You meet a mysterious woman who becomes your girlfriend to secretly test a new drug on you. Text-based with 2D art.
Down and Out with Paris and Marion new city and looking for a job you meet several people who use or want to change you. More linear but enjoyable. Text-based.
Know some where you have more control over your transformation:
The Repurposing Center You get thrown into a facility where layabouts are supposed to get transformed into productive members of society. Has a lot of Diaper and Age Play content last I checked but not much else. Text-based with 2D art.
Hardtimes in Hornstown has vast variety of fetishes and thinks to do. You can start as female or male and transform ingame in either directions. Text-based with 3D renders. Not html, but there is an android port and you can even play in your browser on his website.
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The Company you get to work in a shady pharmaceutical company, where you create mind controlling and sex-changing drugs. Text-based with 2D art and real porn gifs.
eWardrobe you spent your summer in a family cottage and the futuristic eWardrobe mistake you for female cousin and gives you only female clothing.
There are more if you look on tfgames.site and search for html games.
