Subless Challenges
Challenges are the heartbeat. Each runs three weeks — build, vote, launch — but the phases overlap, so something happens every single week.
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All challenges
Notion Calendar alternative
A fast keyboard-first calendar client over CalDAV and Google Calendar, with a menu-bar next-meeting readout and one-click join.
0 entries
Oct 26, 2026
Doodle alternative
A poll for a meeting time: propose slots, share a link, everyone ticks what works, the winner is obvious. No accounts for participants.
0 entries
3h 25m left
SavvyCal alternative
Booking where the guest overlays their own calendar on yours instead of squinting at a slot list. The overlay is the whole product; everything else is Calendly.
0 entries
Oct 12, 2026
Calendly alternative
A public page of open slots, calendar sync so it never double-books, a video link created on booking, and reminder emails. Time zones handled on the guest's side is the part most clones get wrong.
0 entries
Oct 5, 2026
Mixpanel alternative
Event tracking with funnels and retention curves. Retention over time is the chart nobody wants to lose.
0 entries
Sep 28, 2026
Bitly alternative
Short links with click analytics, custom domains and QR codes. Redirect speed and link permanence are the real requirements.
0 entries
Sep 21, 2026
Gyazo alternative
Capture screenshot. Edit it. Save it. Mac application.
1 entry
Sep 16, 2026