# 要知 vs 剂查查

The clearest difference is in-app purchases: 要知 at none against 剂查查's 3. 要知 also leads on ads (none vs shown) and review sentiment (68% vs 48%). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. 剂查查 sells 3 in-app purchases, starting at $1.99 per month. 要知 asks for nothing beyond the download.

要知 holds the better App Store score, 4.3 against 4.1. Both are backed by a comparable volume of ratings — 17 and 39 respectively. Written reviews point the same way: 68% of 要知's written reviews are positive against 48% of 剂查查's.

要知 ships an update fortnightly, 剂查查 every 9 days. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 要知 | 剂查查 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (17 ratings)](https://appshunter.io/ios/app/24/id1618892080/reviews)** | [4.1 (39 ratings)](https://appshunter.io/ios/app/id6736932686/reviews) |
| Number of ratings | 17 | **39** |
| Positive reviews | **68.3% of reviews** | 48.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Every 9 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 53 MB | 81 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Qingdao Ruanmei Network Technology Co., ltd.](https://appshunter.io/developer/570610862) | [Zhengzhou Baisida Network Technology Co., Ltd.](https://appshunter.io/developer/1596434594) |

## What reviewers say

### 要知

[App page](https://appshunter.io/ios/app/24/id1618892080)

This app provides a concise daily briefing of major events from the past 24 hours, week, and year. It aims to combat information overload by summarizing key news across domestic and international topics, social media trends, and various sectors like technology, finance, and entertainment.

**Highlights:** Daily event summaries, 24-hour, weekly, and yearly recaps, Covers domestic and international news, Includes social media trends, Summarizes tech, finance, and entertainment news

**Features:** Vision Pro support

**In-app purchases:** none


### 剂查查

[App page](https://appshunter.io/ios/app/id6736932686)

This app helps users quickly identify food additives by scanning product barcodes. It provides detailed safety information and assessments, making it easier to make informed choices for family health. The interface is designed for ease of use by all ages.

**Highlights:** Barcode scanning for additive info, Fast, millisecond feedback, Simple, user-friendly interface, Detailed additive assessments, AI-powered data analysis

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 续订月会员 | $1.99 | per month |
| 续订年会员 | $7.99 | per year |
| 购买永久会员 | $29.99 | one-time |


## Frequently asked questions

### Is 要知 free?

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

### Is 剂查查 free?

剂查查 is free to download, with in-app purchases available.

### Which has better reviews, 要知 or 剂查查?

要知 is rated higher. 要知 averages 4.3 out of 5 from 17 ratings, while 剂查查 averages 4.1 from 39 ratings.

### Do 要知 or 剂查查 have ads?

剂查查 shows ads; 要知 does not.

### Which is updated more often, 要知 or 剂查查?

要知 ships an update fortnightly, and 剂查查 every 9 days. Most recently, 要知 was updated on October 22, 2026 and 剂查查 on October 24, 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.*