I've been seeing a lot of posts about people being stuck between server (lemmy 0.18) and client (Jerboa 0.0.33—35) versions (not installed from IzzyOnDroid and logged in) with Jerboa crashing. Here's a way to avoid that issue while still being able to log in and browse both Lemmy 0.18 or older instances.
Add IzzyOnDroid repo to F-Droid
Delete app data from Android app info (edit)
Uninstall current version of Jerboa
Install 0.0.33 IzzyOnDroid version of Jerboa
Set phone to Airplane mode
Open Jerboa and use the hamburger menu to add your account
Fill in server, username, and password
Turn off Airplane mode
Login
You'll get a old server version notification of your server hasn't updated but you'll be able to use Jerboa regardless of server version.
With an alpha version that's releasing updates every 3-8 days, it's generally better to get it directly from the source. Google play takes one week to verify new releases, which doesn't matter for established apps, but with rapid release cycles in active development, it can be annoying.
They are also pushing updates to F-Droid though if you want to have some app store behind it, they publish updates within hours of releasing.