Monthly 48-hour build challenge
Ship in 48. Win prizes.
A new theme on the first Friday of every month at 18:00 UTC. Solo or teams of up to three. Free to enter.
Starts in—
Build window48h
Team size1–3
Entry fee$0
How it works
Register
Sign up any time before the start. You get the theme by email at kick-off.
Fri 18:00
Theme announced. The 48-hour clock starts.
Sun 18:00
Submissions close: live URL, 2-minute video, short write-up.
+7 days
Judging, community vote and winners announced in the Launch Brief.
Judging criteria
| Criterion | Weight |
|---|---|
| Problem clarity — a real, specific pain | 30% |
| Execution — it works, end to end | 30% |
| Traction — real users or sign-ups in 48h | 25% |
| Presentation — clear demo and story | 15% |
Prizes
Prizes are published with each month's theme and depend on the sponsor pool. Typical prizes include cash awards for the top three, a free done-for-you growth sprint for the winner, tool credits from sponsors, and features in the newsletter and on the home page.
Register for the next challenge
Submit your entry
Only during the 48-hour window.
Official rules (summary)
- Eligibility: open to individuals aged 18 or older where such contests are lawful. Void where prohibited. Organisers and their families may not win prizes.
- Skill-based: winners are selected by judges using the published criteria. No purchase or payment is necessary to enter or win.
- Original work: entries must be built during the 48-hour window. Open-source libraries and AI tools are allowed; disclose major pre-existing components.
- Ownership: you keep all rights to your project. You grant 222248.com permission to feature your entry's name, screenshots and description.
- Prizes: announced with each theme. Prizes are non-transferable; winners are responsible for any taxes. Prizes may require identity and eligibility verification.
- Conduct: no illegal, harmful, hateful or infringing projects. We may disqualify entries that break these rules.
- Changes: we may modify or cancel a challenge if circumstances require; registered participants will be notified.
Questions about the rules? Contact us.