Pro

Preparation scheduled against the round it is for

Every scheduled round pulls the right preparation in front of it: the modules that cover what this company asks, the drills worth re-running, and the questions from the bank that match the team.
In development

What it does

Rounds, with the preparation block attached to each
Revision scheduled backwards from the date
Time-zone handling that does not lose you an hour
Syncs with the tracker, so a moved round moves the prep

What it puts in front of you

A calendar that only holds dates is a worse version of the one you already have.
The round, with prep attached
A scheduled round is not a calendar entry, it is a deadline. The modules that cover what this company asks are pulled in front of it.
Revision, scheduled backwards
From the date, not from today. What you re-run the night before is a different list from what you start three weeks out.
Time zones that do not lose an hour
A remote loop crosses three of them and a recruiter's invite is usually written in theirs. The commonest way to miss a round is arithmetic.
Moves with the tracker
A rescheduled round drags its preparation with it. The two are the same record, not two places to keep the same date.
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Tracks, from the network to the negotiation
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Modules, each ending in a drill
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Systems worked end to end

Nothing here has shipped yet, and the site says so.