# Problem Solving Kit vs K3學中文 (寫字認字)

The clearest difference is price: Problem Solving Kit at Free against K3學中文 (寫字認字)'s $7.99. K3學中文 (寫字認字)'s advantage is update cadence (every 9 months vs every 24 months) and device support (3 vs 1). On ads, in-app purchases and iOS requirement there is nothing between them.

Problem Solving Kit is free to download; K3學中文 (寫字認字) costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Problem Solving Kit ships an update every 24 months, K3學中文 (寫字認字) every 9 months. The most recent releases landed on October 10, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Problem Solving Kit | K3學中文 (寫字認字) |
| --- | --- | --- |
| Price | **Free** | $7.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/problem-solving-kit-lite/id827420475/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 9 months** |
| Monetization | Free | — |
| Size | 95 MB | 362 MB |
| Requires iOS | 9.3 | **9.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [協康會](https://appshunter.io/developer/580776082) | [Yiu Ying Ching](https://appshunter.io/developer/1667170345) |

## What reviewers say

### Problem Solving Kit

[App page](https://appshunter.io/ios/app/problem-solving-kit-lite/id827420475)

This app helps children with special needs, particularly those with ASD, develop problem-solving skills. It uses interactive games across four scenarios: daily life, school, emergencies, and social interactions, to prepare them for changes and challenges.

**Highlights:** Interactive problem-solving games, Four key scenarios covered, User-friendly interface, Cantonese and Mandarin language support, Traditional and Simplified Chinese subtitles

**Features:** macOS Compatibility

**In-app purchases:** none


### K3學中文 (寫字認字)

[App page](https://appshunter.io/ios/app/k3/id1669891510)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Problem Solving Kit free?

Problem Solving Kit is free to download, with no in-app purchases.

### Is K3學中文 (寫字認字) free?

K3學中文 (寫字認字) costs $7.99, with no in-app purchases.

### Do Problem Solving Kit or K3學中文 (寫字認字) have ads?

Neither Problem Solving Kit nor K3學中文 (寫字認字) shows ads.

### Which is updated more often, Problem Solving Kit or K3學中文 (寫字認字)?

Problem Solving Kit ships an update every 24 months, and K3學中文 (寫字認字) every 9 months. Most recently, Problem Solving Kit was updated on October 10, 2026 and K3學中文 (寫字認字) on October 27, 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.*