Here’s all info you need, incl. a link to the test version
You can find links to this kind of info, at the bottom of the app’s app store page, if it is provided for by the developer(s).
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Also, when you want to install the test version of an app, just hit the ‘Test’ icon, and hit ‘install’ after that.
Or,
just add /test at the end of the app store URL, and press enter, then hit ‘install’.
When there’s no ‘Test’ icon, or the URL changes back (/test disappears again), there simply is no test version available at that time.
