# SmartCtl vs 答案之书

The clearest difference is in-app purchases: SmartCtl at none against 答案之书's 1. SmartCtl also leads on ads (none vs shown) and update cadence (every 10 days vs every 12 months). On price and device support there is nothing between them.

Both are free to download. 答案之书 sells 1 one-off in-app purchase. SmartCtl asks for nothing beyond the download.

SmartCtl ships an update every 10 days, 答案之书 every 12 months. The most recent releases landed on September 5, 2026 and August 15, 2026 respectively.

## The numbers

| Metric | SmartCtl | 答案之书 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 21.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 10 days** | Every 12 months |
| Size | 33 MB | 6 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HMAUDIO Technology Co.,Ltd](https://appshunter.io/developer/1257360532) | [唯墨科技](https://appshunter.io/developer/1240699340) |

## What reviewers say

### SmartCtl

[App page](https://appshunter.io/ios/app/smartctl/id1275870913)

**Features:** macOS Compatibility

**In-app purchases:** none


### 答案之书

[App page](https://appshunter.io/ios/app/id1475703134)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 解锁无限问题 | $0.99 | one-time |


## Frequently asked questions

### Is SmartCtl free?

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

### Is 答案之书 free?

答案之书 is free to download, with in-app purchases available.

### Do SmartCtl or 答案之书 have ads?

答案之书 shows ads; SmartCtl does not.

### Which is updated more often, SmartCtl or 答案之书?

SmartCtl ships an update every 10 days, and 答案之书 every 12 months. Most recently, SmartCtl was updated on September 5, 2026 and 答案之书 on August 15, 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.*