# 时间书 vs 灵光

The clearest difference is in-app purchases: 灵光 at none against 时间书's 4. 灵光 also leads on update cadence (every 10 days vs monthly). 时间书's advantage is iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. 时间书 sells 4 one-off in-app purchases. 灵光 asks for nothing beyond the download.

时间书 ships an update monthly, 灵光 every 10 days. The most recent releases landed on October 1, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | 时间书 | 灵光 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (81 ratings)](https://appshunter.io/ios/app/ai/id6751496092/reviews)** |
| Number of ratings | — | **81** |
| Positive reviews | — | 76.4% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 10 days** |
| Monetization | — | Free |
| Size | 33 MB | 278 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [和柳 郑](https://appshunter.io/developer/1664971686) | [Alipay (Hangzhou) Technology Co., Ltd.](https://appshunter.io/developer/333206292) |

## What reviewers say

### 时间书

[App page](https://appshunter.io/ios/app/id6448215756)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 时间书月会员 | $0.99 | one-time |
| 时间书标签配额 | $0.99 | one-time |
| 时间书年度会员 | $6.99 | one-time |
| 时间书三年会员 | $14.99 | one-time |


### 灵光

[App page](https://appshunter.io/ios/app/ai/id6751496092)

This AI assistant integrates language, image, voice, and data understanding to generate multimodal outputs like 3D models, audio, charts, and animations. It offers features for quick app generation, interactive learning, and intelligent visual exploration, making complex information simple.

**Highlights:** Generate interactive apps in 30 seconds, Visualize complex knowledge with 3D models, illustrations, and animations, Understand and generate images and videos, Real-time scene understanding and visual Q&A, Interactive maps for planning and exploration, Summarize financial reports and documents

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

**In-app purchases:** none


## Frequently asked questions

### Is 时间书 free?

时间书 is free to download, with in-app purchases available.

### Is 灵光 free?

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

### Do 时间书 or 灵光 have ads?

Neither 时间书 nor 灵光 shows ads.

### Which is updated more often, 时间书 or 灵光?

时间书 ships an update monthly, and 灵光 every 10 days. Most recently, 时间书 was updated on October 1, 2026 and 灵光 on October 17, 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.*