# 1A2B Fun! vs 城市謎案 Case City

The clearest difference is in-app purchases: 城市謎案 Case City at none against 1A2B Fun!'s 1. 城市謎案 Case City also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. 1A2B Fun! sells 1 one-off in-app purchase. 城市謎案 Case City asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on June 24, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | 1A2B Fun! | 城市謎案 Case City |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/1a2b-fun-logic-mastermind/id1459347669/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 7 MB | 27 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Ming-Ta Yang](https://appshunter.io/developer/1459347668) | [JingZhi Co., Ltd.](https://appshunter.io/developer/981874522) |

## What reviewers say

### 1A2B Fun!

[App page](https://appshunter.io/ios/app/1a2b-fun-logic-mastermind/id1459347669)

Engage in classic logic puzzles with a Mastermind mode and a challenging 5-digit option. Compete with friends to achieve top ranks and test your deductive reasoning skills in this casual brain teaser.

**Highlights:** Classic Mastermind logic game, 5-digit challenge mode, Rankings for friend competition, Casual brain teaser, Deductive reasoning puzzles

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Bottom Ad | $0.99 | one-time |


### 城市謎案 Case City

[App page](https://appshunter.io/ios/app/case-city/id1466057703)

**In-app purchases:** none


## Frequently asked questions

### Is 1A2B Fun! free?

1A2B Fun! is free to download, with in-app purchases available.

### Is 城市謎案 Case City free?

城市謎案 Case City is free to download, with no in-app purchases.

### Do 1A2B Fun! or 城市謎案 Case City have ads?

1A2B Fun! shows ads; 城市謎案 Case City does not.

### Which is updated more often, 1A2B Fun! or 城市謎案 Case City?

1A2B Fun! ships an update every 3 months, and 城市謎案 Case City every 3 months. Most recently, 1A2B Fun! was updated on June 24, 2026 and 城市謎案 Case City on September 8, 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.*