Daily Signal

Inspiration

The inspiration for Daily Signal came from a common problem: there is too much information. Every day, news and updates repeat the same content. Reading everything takes time, but it is still hard to know what actually changed. I wanted to build an application that focuses on one simple question: What is different today compared to before? The goal was to reduce noise and help users focus only on meaningful changes.

What it does

Daily Signal is a change-based intelligence application. Users subscribe to a topic they care about, such as jobs, sports, or politics in a specific country or region. When a user subscribes for the first time, the app uses Google Search to collect information and save it as a baseline snapshot. Every day, the app collects new information and compares it with the previous snapshot. The app shows:

• What changed
• Why the change matters
• Who is affected

If nothing important changed, the app clearly says no significant changes.

How I built it

I built Daily Signal using Gemini 3 as the core intelligence engine. Gemini 3 is used to compare information snapshots and reason about changes over time. Google Search is used to collect information automatically. The subscriptions and their snapshots are being saved in Supabase database. The frontend was built as a simple web interface with simple subscription form and list of collapsible subcriptions. I also used Gemini 3 to translate results into the user’s selected language while keeping the same structure and meaning.

Challenges I ran into

One major challenge was avoiding unnecessary output. AI models often try to generate results even when nothing has changed.

Accomplishments that I am proud of

• Successfully detected meaningful changes over time
• Treated “no change” as valuable information
• Delivered structured, multilingual intelligence
• Created a simple and clear user experience
• How far it has being helping me already

What I learned

I learned that Gemini 3 is very powerful when used for reasoning, not just summarization. I also learned the importance of clear prompts and structured output. Most importantly, I learned that sometimes the best answer is saying that nothing changed.

What's next for Daily Signal

Next, we want to improve Daily Signal by adding:

• User authentication and authorization each user to have his/her own subscriptions
• Smarter notification controls
• Real-time alerts for important updates

Daily Signal can grow into a personal intelligence assistant that helps people stay informed without information overload.

Built With

• gemini3api
• googleaistudio
• react
• supabase
• typescript