# HK P.1 & P.2 Math vs Bisyntax Builder

The clearest difference is update cadence: Bisyntax Builder at every 4 months against HK P.1 & P.2 Math's every 30 months. HK P.1 & P.2 Math's advantage is iOS requirement (9.0 vs 11.0). On price, ads, in-app purchases and device support there is nothing between them.

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

HK P.1 & P.2 Math ships an update every 30 months, Bisyntax Builder every 4 months. The most recent releases landed on September 20, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | HK P.1 & P.2 Math | Bisyntax Builder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (1 ratings)](https://appshunter.io/ios/app/bisyntax-builder/id1609890539/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 30 months | **Every 4 months** |
| Monetization | — | Free |
| Size | 7 MB | 587 MB |
| Requires iOS | **9.0** | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yik Lam Leung](https://appshunter.io/developer/1215582728) | [Kazoo Technology (Hong Kong) Limited](https://appshunter.io/developer/1256905363) |

## What reviewers say

### HK P.1 & P.2 Math

[App page](https://appshunter.io/ios/app/hk-p1-and-p2-math/id1215582729)

**Features:** macOS Compatibility

**In-app purchases:** none


### Bisyntax Builder

[App page](https://appshunter.io/ios/app/bisyntax-builder/id1609890539)

Learn Chinese and English syntactic skills through engaging, game-like lessons. Master sentence structure, tenses, and prepositions with hundreds of practice questions. Acquire basic grammar knowledge in a fun and interactive way.

**Highlights:** Parallel Chinese and English syntactic skill development, Game-like lessons for basic grammar, Focus on sentence structure and tenses, Hundreds of practice questions, Engaging and fun learning experience

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HK P.1 & P.2 Math free?

HK P.1 & P.2 Math is free to download, with no in-app purchases.

### Is Bisyntax Builder free?

Bisyntax Builder is free to download, with no in-app purchases.

### Do HK P.1 & P.2 Math or Bisyntax Builder have ads?

Neither HK P.1 & P.2 Math nor Bisyntax Builder shows ads.

### Which is updated more often, HK P.1 & P.2 Math or Bisyntax Builder?

HK P.1 & P.2 Math ships an update every 30 months, and Bisyntax Builder every 4 months. Most recently, HK P.1 & P.2 Math was updated on September 20, 2026 and Bisyntax Builder on September 30, 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.*