Y Combinator vs Project Chiron
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Y Combinator
Access Y Combinator's extensive library of startup content, including YouTube videos, podcasts, and essays. It also serves as a mobile client for Hacker News, offering the latest startup news for founders and programmers. Additional features are available for YC-funded founders.
- Organized YC YouTube videos
- Startup School content
- On-the-go podcast listening
- Hacker News mobile client
- YC founder-only knowledge base
- Access Bookface feed and messages
Read full descriptionHide full description
The Y Combinator App is your home for all things YC. It organizes all of YC's YouTube videos, podcasts, and essays. It's also a mobile client for Hacker News, the best startup news source for programmers and technical founders. For founders who have been funded by YC, it has additional features. For everyone: - Organizes all of YC's YouTube videos - the world's best content on startups - All of the content from Startup School - Listen to YC podcasts on the go - Read Hacker News - the best news source for programmers and technical founders For YC founders: - Access the Bookface feed - Access Bookface messages - Read the YC founder-only knowledge base
Project Chiron
Read full descriptionHide full description
Stuck on a math problem you refuse to give up on? Chiron writes the smallest hint on your page, just enough to keep you thinking, without spoiling the math. Write your working by hand. Chiron reads every line as you go and steps in only when it helps: a nudge when you're stuck, a question when you're close, a quiet check when you're not sure. It teaches. It never lectures. KEEP THINKING • Hints sized to the moment: the smallest push that keeps you moving • Get pointed at the slip, not handed the answer • Ask out loud, "where do I even start?", and talk it through DOES THE MATH PROPERLY • Every check is grounded in a real symbolic engine, so feedback is exact, never a chatbot's guess • Catches the sign you flipped, the solution you gained, the step that doesn't follow • Built for real work: algebra, trigonometry, calculus, ODEs, logs and more BRING YOUR OWN • Snap any problem with the camera and start working • Upload your notes and Chiron works from your course, not a generic one Best with an Apple Pencil. Chiron. Keep thinking.
Screenshots
Verdict
The clearest difference is update cadence: Project Chiron at every 5 days against Y Combinator's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Y Combinator ships an update every 3 weeks, Project Chiron every 5 days. The most recent releases landed on September 18, 2026 and September 17, 2026 respectively.
| Parameter | Y Combinator | Project Chiron |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (26 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 26 — better | — |
| Update frequency | Every 3 weeks | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.4 | 16.0 — better |
| Further details — not scored | ||
| Size | 84 MB | 144 MB |
| Age rating | 4+ | 4+ |
| Developer | Y Combinator | James Booth |
In-app purchases
Y Combinator
No in-app purchases
Project Chiron
No in-app purchases
Questions
Is Y Combinator free?
Is Project Chiron free?
Do Y Combinator or Project Chiron have ads?
Which is updated more often, Y Combinator or Project Chiron?
Other comparisons
