# Y Combinator vs Zetamac Arithmetic Practice

The clearest difference is review sentiment: Zetamac Arithmetic Practice at 82% against Y Combinator's 50%. Zetamac Arithmetic Practice also leads on update cadence (daily vs every 3 weeks) and rating (4.7 vs 4.3). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Zetamac Arithmetic Practice holds the better App Store score, 4.7 against 4.3. Both are backed by a comparable volume of ratings — 26 and 18 respectively. Written reviews point the same way: 50% of Y Combinator's written reviews are positive against 82% of Zetamac Arithmetic Practice's.

Y Combinator ships an update every 3 weeks, Zetamac Arithmetic Practice daily. The most recent releases landed on September 18, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Y Combinator | Zetamac Arithmetic Practice |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (26 ratings)](https://appshunter.io/ios/app/y-combinator/id6464718392/reviews) | **[4.7 (18 ratings)](https://appshunter.io/ios/app/zetamac-arithmetic-practice/id6737153617/reviews)** |
| Number of ratings | **26** | 18 |
| Positive reviews | 50.0% of reviews | **82.4% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Daily** |
| Monetization | Free | Free |
| Size | 84 MB | 1 MB |
| Requires iOS | **16.4** | 17.5 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Y Combinator](https://appshunter.io/developer/1706164044) | [Joseph Ma](https://appshunter.io/developer/1774979062) |

## What reviewers say

### Y Combinator

[App page](https://appshunter.io/ios/app/y-combinator/id6464718392)

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.

**Highlights:** 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

**In-app purchases:** none


### Zetamac Arithmetic Practice

[App page](https://appshunter.io/ios/app/zetamac-arithmetic-practice/id6737153617)

This app offers mental math practice tailored for quantitative finance professionals. It focuses on improving calculation speed and accuracy for complex numerical problems.

**Highlights:** Mental math practice, Quantitative finance focus, Calculation speed improvement, Accuracy enhancement, Numerical problem solving

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Y Combinator free?

Y Combinator is free to download, with no in-app purchases.

### Is Zetamac Arithmetic Practice free?

Zetamac Arithmetic Practice is free to download, with no in-app purchases.

### Which has better reviews, Y Combinator or Zetamac Arithmetic Practice?

Zetamac Arithmetic Practice is rated higher. Y Combinator averages 4.3 out of 5 from 26 ratings, while Zetamac Arithmetic Practice averages 4.7 from 18 ratings.

### Do Y Combinator or Zetamac Arithmetic Practice have ads?

Neither Y Combinator nor Zetamac Arithmetic Practice shows ads.

### Which is updated more often, Y Combinator or Zetamac Arithmetic Practice?

Y Combinator ships an update every 3 weeks, and Zetamac Arithmetic Practice daily. Most recently, Y Combinator was updated on September 18, 2026 and Zetamac Arithmetic Practice on October 1, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*