# 古往今猜 vs 时空回音

The clearest difference is in-app purchases: 时空回音 at none against 古往今猜's 3. 古往今猜's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. 古往今猜 sells 3 in-app purchases, starting at $0.99 per 7 days. 时空回音 asks for nothing beyond the download.

古往今猜 ships an update every 2 weeks, 时空回音 weekly. The most recent releases landed on October 31, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | 古往今猜 | 时空回音 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Weekly** |
| Size | 28 MB | 23 MB |
| Requires iOS | **17.6** | 18.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [杭杰 叶](https://appshunter.io/developer/1799458800) | [NEOBARAN](https://appshunter.io/developer/1536103536) |

## What reviewers say

### 古往今猜

[App page](https://appshunter.io/ios/app/ai/id6757539986)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周会员 | $0.99 | per 7 days |
| 月会员 | $0.99 | per month |
| 年会员 | $4.99 | per year |


### 时空回音

[App page](https://appshunter.io/ios/app/id6802930227)

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

**In-app purchases:** none


## Frequently asked questions

### Is 古往今猜 free?

古往今猜 is free to download, with in-app purchases available.

### Is 时空回音 free?

时空回音 is free to download, with no in-app purchases.

### Do 古往今猜 or 时空回音 have ads?

时空回音 shows ads; 古往今猜 does not.

### Which is updated more often, 古往今猜 or 时空回音?

古往今猜 ships an update every 2 weeks, and 时空回音 weekly. Most recently, 古往今猜 was updated on October 31, 2026 and 时空回音 on October 29, 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.*