The Bloomathon: Win Hundreds in Credits + Bloom Pro
Everything you need to know to participate. Starts Saturday 4 PM CET, ends Thursday.
Sirian Maathuis·4 min read
The Challenge
The Bloomathon is a 6-day build-in-public sprint where you use Bloom and GPT 5.5 to go from idea to working app. This isn't a traditional hackathon where pitches matter more than product. Here, the only thing that counts is what you ship.
Post your progress publicly, build something real, and by Thursday you'll have a working app to show for it!
Who It's For
- Founders and makers who have an idea and want to validate it with a real product, not a slide deck
- Developers who want to ship a side project without the usual setup overhead
- Designers who want to turn a concept into a working prototype they can actually use
If you've ever said "I have an app idea," this is your week to build it.
Credits: How It Works
You earn OpenAI credits as you hit milestones. Two milestones, two credit drops.
Milestone 1: Sign Up
Reward: 2,500 OpenAI credits ($25 value)
Sign up on the Bloomathon tracking app with your email and proof that you're following @CreateWithBloom. Once verified, you'll receive your credit code via email. This gives you GPT 5.5 access, enough to build a fully functional app.
Milestone 2: Post That You're Building
Reward: +2,500 OpenAI credits ($25 value)
Post publicly that you're participating in the Bloomathon. Do this within 48 hours of the start (by Monday 4 PM CET) to claim the bonus.
Your post must:
- Be on X, LinkedIn, or TikTok
- Tag @CreateWithBloom
- Include #Bloomathon
- Mention what you're building
- Link to your post
- Screenshot of your post
- Your app.diy link
We verify and send your additional credits.
Total Possible: 5,000 Credits ($50 value)
How to Enter
- Follow @CreateWithBloom on X
- Sign up on the Bloomathon tracking app with your email + proof of follow
- Get your first 2,500 credits via email → Milestone 1 complete
- Post that you're building (within 48 hours) and submit proof in the tracking app
- Get your bonus 2,500 credits → Milestone 2 complete
- Build your app
Submission Requirements
To enter judging, you must:
- Post your finished app on X, LinkedIn, or TikTok by Thursday EOD (CET)
- Submit your post link + app link in the Bloomathon app
- Post in #showcase on Discord with:
- Your app.diy link
- One-paragraph description of what it does
- Brief note on your building experience
Social Sharing Guidelines
What to include when sharing your submission:
- A short video walkthrough of your app (30+ seconds recommended)
- Screen recording works great
- 1-2 sentences explaining what you built
- Tag @CreateWithBloom
- Use #Bloomathon
We will repost, comment, and engage with your posts. Help us help you get visibility.
Great post examples
- Show the app in action
- Talk about what you built and why
- Share your building experience with Bloom
Evaluation Criteria
30 points total across 4 pillars:
Functionality (10 pts)
What's the core concept? Does it actually work?
Design and Taste (10 pts)
Does it look good? Does it feel good to use?
Originality (5 pts)
How original is the idea? Bonus points for startup potential.
Bloom Utilization (5 pts)
How far did you push Bloom? Did you integrate anything extra?
Community Favorite
Determined by engagement metrics across platforms:
X: Views, likes, reposts, bookmarks
TikTok: Views, likes, shares, bookmarks
The most engaged-with submission wins Community Favorite.
The Prizes
1st Place: Best Overall
- 30,000 OpenAI credits ($300 value)
- 3 months Bloom Pro
2nd Place
- 20,000 OpenAI credits ($200 value)
- 3 months Bloom Premium
3rd Place
- 10,000 OpenAI credits ($100 value)
- 3 months Bloom Starter
Community Favorite
- 7,500 OpenAI credits ($75 value)
- 1 month Bloom Premium
- Featured on our X account
Timeline
- Saturday 4 PM CET
- Bloomathon starts. 48-hour build-in-public window opens.
- Monday 4 PM CET
- Milestone 2 deadline. Post that you're building to claim bonus credits.
- Monday to Wednesday
- Build week. Daily updates. Streams.
- Thursday midday CET
- Submissions close.
- Thursday evening
- Live judging stream. Winners announced.
Prizes delivered within 48 hours of the finale.
Meet the Judges
David, Co-founder, Bloom
Sirian, Co-founder, Bloom
They'll review every submission and judge live on Thursday. Top apps get detailed analysis using the 4 pillars.
FAQ
Do I need coding experience?
No. Bloom handles the code. You describe what you want to build.
Can I work on something I've already started?
Past projects are allowed if they're your own work.
What if I don't post within 48 hours?
You keep your Milestone 1 credits (2,500) but miss the Milestone 2 bonus (2,500). You can still submit your final app for judging.
When do I get my prizes?
Within 48 hours of the finale.
Can I submit multiple apps?
Yes. Submit each as a separate entry.
What counts as a valid build-in-public post?
Any public post on X, LinkedIn, or TikTok that tags @CreateWithBloom, uses #Bloomathon, and mentions what you're building. Submit your post link, screenshot, and app.diy link in the tracking app to verify.