You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.

app01
0.1.6

This version was deleted from PyPI around 2023-10-18. Installing fails with:
$ pip3 install app01==0.1.6 ERROR: Could not find a version that satisfies the requirement app01==0.1.6
View other deleted versions of app01

Install through StableBuild

You can install this package from StableBuild's PyPI snapshots from before the version was deleted:
pip3 install \ -i https://YOUR_API_KEY.pypimirror.stablebuild.com/2023-10-17/ \ app01==0.1.6
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)

Or, download files manually

And install manually via pip:
app01-0.1.6-py2.py3-none-any.whl (5.0KB)
app01-0.1.6.tar.gz (9.5KB)