I haven’t much considered that given there are other Z-machine interpreters available for Android. There is JFrotz, which is based on a conversion of Frotz 2.43 from C to Java. There is also Termux, which allows regular Linux packages to be built and run in an Android environment. Frotz is one of those packages that can be thus run. Son of Hunkypunk embeds Frotz.
Well, Jfrotz doesn’t work anymore.
Fabularium don’t do any transcript for Glulxe games.
Running an app under Termux in a phone needs a microscope to see numbers.
Hunky punky don’t run Glulxe games.
Twisty comes in Hadean Lands package but is unable to run this game at all.
The only option is Text fiction under Thunderword with Incant Launcher. All alphas and betas releases.
I don’t know the amount of work needed to do a multi interpreter for Android. While there are some interpreters for eldest and oddest platforms, there is no one that runs properly in Android.
I really liked Frotz in my ios stuff. I have lost both, my iphone and ipad for hardware issues in less than a month. I can’t say the same about any program running in the Android platform.
iplayif.com is an option, and will be an even better option once it becomes an installable app in the medium-near future. But for now it supports Glulx, Hugo, TADS, and Z-Code, as well as transcripts, and should display at a decent font size.
Spanish IF uses parchement a lot. For example Incanus has his games running in parchment… but there are lot of issues with other games related to sound, color, graphics, random number generators and parser versions.