Features and details, links, longish.
From the Fedilab page at F-Droid.org:
"Fedilab is a multifunctional Android client to access the distributed Fediverse, consisting of micro blogging, photo sharing and video hosting.
It supports:
- Mastodon, Pleroma, Pixelfed, Peertube, GNU Social, Friendica.
The app has advanced features (especially for Pleroma and Mastodon):
- Multi-accounts support
- Schedule messages from the device
- Schedule boosts
- Bookmark messages
- Follow and interact with remote instances
- Timed mute accounts
- Cross-account actions with a long press
- Translation feature
- Art timelines
- Video timelines"
** Important Note -- TRANSLATION support, handy if you need help with a non native language. Unique, at this point, I believe.
You can get it from the Google Play store, where it COSTS $3.29 USD
https://play.google.com/store/apps/details?id=app.fedilab.android
OR -- you can get it FREE of charge, donnations accepted, from F-Droid :
https://f-droid.org/packages/fr.gouv.etalab.mastodon/
F-Droid is easiest if you install their client app - from there you will have access to many interesting and clean Open Source Apps.
You CAN get an apk from their page, and Side Load on your device if desired. Android 5 minimum version required.
Features and details, links, longish.
And a good reporter should try out things, so here I am... Via Fedilab Lite, which I just discovered on F-Droid. 
It seems nice and this is smaller version, 12 MB download only.
Fedilab (Fedilab is a multifunctional Android client to access the distributed Fediverse) - https://f-droid.org/app/fr.gouv.etalab.mastodon
Screenshots from and sent thru Fedilab Lite. 
Features and details, links, longish.
Fedilab LITE version -- link Correction !
I did the two posts above from Fedilab Lite, which still not very familiar with it.
The LITE version page at F-Droid is on this location : https://f-droid.org/en/packages/app.fedilab.lite/
The Lite version is *NOT* listed at Google Play at this moment, or at least I can't find it on a search or under the author's other programmes page.
Compared to the full version, which I haven't used yet, this is less than half the size; might signal it's easier on battery life as well.
Features and details, links, longish.
Was looking around in the Settings menus, which in the Lite version are simplified. Took some snapshots, my phone uses Portuguese as systems language.
Interesting, was able to increase maximum toot size to 3,000 characters.
Not that I would ever type that mu h on mobile, but it's the first client I tried that allows it, other than the mastodon web client, which gets the instance settings perfectly.
It looks nice, I would recommend it, and it does other Fedi tasks like video and music sharing too.
The counter on the bottom. Of the editor area already shows me near 600 characters on this post, and it's not. Locking me from sending it. YEY!