This week, we’re excited to share three projects that have proven their utility by solving concrete problems for real users: RecallNote, ACHLS Eternal, and Rivver Accountant.

Meet the Projects of The Week

RecallNote

RecallNote is an EdTech solution designed to help students and self-learners fight the forgetting curve through personalized, AI-generated study concepts and spaced repetition.

RecallNote solves the problem of forgetting 70% of lecture material within 24 hours by turning notes into AI-summarized, personalized concepts using Google’s LearnLM, vibrant flashcards, offline storage, and spaced repetition notifications for 50% better retention. It focuses on students and self-learners who need to retain what they read.

Proof of Usefulness score: +37 / 1000

ACHLS Eternal

ACHLS Eternal is a proof-of-concept that aims to revolutionize the scientific method by combining an automated materials science and medical lab complex with a cognitive synthetic architecture trained on grounded data.

The concept combines an automated materials science, a medical lab complex with 135 different state vector labs, and a cognitive synthetic architecture LLM based off concepts by Tononi of IIT and Global Workspace Theory.

Proof of Usefulness score: +12 / 1000

Rivver Accountant

Rivver Accountant is an AI-powered personal wealth management platform tailored for the Caribbean. By aggregating financial data and providing intelligent insights, the project helps a new generation of earners better manage, save, and grow their wealth.

The AI and Automation revolution will definitely bring volatility to jobs, income and investments, so Rivver is building financial tools so users know where they are, where they are going and how to get there.

Proof of Usefulness score: +51 / 1000

Want to submit your project to the Proof of Usefulness hackathon?

What is Proof of Usefulness?

It's our answer to a web drowning in vaporware and empty promises. We evaluate projects based on:
▪️ Real user adoption
▪️ Sustainable revenue
▪️ Technical stability
▪️ Genuine utility

Test your project’s usefulness and submit your report on Hackernoon before August 10, 2026, to compete for over $150,000 in cash prizes and software credits.

Projects score from -100 to +1000. Top scorers compete for $20K in cash and $130K+ in software credits.

You’ll be in good company. The hackathon is backed by teams who ship production software for a living - Bright Data, Neo4j, Storyblok, Algolia, and HackerNoon.

What happens when you submit:

1. Get your free Proof of Usefulness score instantly
2. Your submission becomes a HackerNoon article (published within days)
3. Compete for monthly prizes
4. All participants get rewards

Complete guide on how to submit here.

That’s all for now.

Until next time, Hackers!