# 扇贝知卡 vs 惜时

The clearest difference is in-app purchases: 扇贝知卡 at none against 惜时's 3. 惜时's advantage is update cadence (every 5 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 惜时 sells 3 in-app purchases, starting at $0.99 per 7 days. 扇贝知卡 asks for nothing beyond the download.

扇贝知卡 ships an update every 2 weeks, 惜时 every 5 days. The most recent releases landed on October 21, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | 扇贝知卡 | 惜时 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/id6756336750/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 5 days** |
| Monetization | Free | — |
| Size | 35 MB | 76 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nanjing Treasure Island Information Technology Co., Ltd.](https://appshunter.io/developer/1646949971) | [星昱 曹](https://appshunter.io/developer/1481431616) |

## What reviewers say

### 扇贝知卡

[App page](https://appshunter.io/ios/app/id6756336750)

This app breaks down complex information into easy-to-understand flashcards, covering diverse topics like science and psychology. It's designed for efficient learning during short breaks, helping users build consistent study habits with visual progress tracking.

**Highlights:** Knowledge flashcards, Multi-topic content, Fragmented time learning, Daily learning check-ins, Visual progress tracking, Card set learning structure

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

**In-app purchases:** none


### 惜时

[App page](https://appshunter.io/ios/app/app/id6760806508)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1周 | $0.99 | per 7 days |
| 1个月 | $2.99 | per month |
| 3个月 | $6.99 | per 3 months |


## Frequently asked questions

### Is 扇贝知卡 free?

扇贝知卡 is free to download, with no in-app purchases.

### Is 惜时 free?

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

### Do 扇贝知卡 or 惜时 have ads?

Neither 扇贝知卡 nor 惜时 shows ads.

### Which is updated more often, 扇贝知卡 or 惜时?

扇贝知卡 ships an update every 2 weeks, and 惜时 every 5 days. Most recently, 扇贝知卡 was updated on October 21, 2026 and 惜时 on October 6, 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.*