# NFC小卡 vs 知我

The clearest difference is in-app purchases: NFC小卡 at none against 知我's 3. 知我's advantage is update cadence (every 8 days vs every 2 months) and iOS requirement (13.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. 知我 sells 3 in-app purchases, starting at $3.99 per month. NFC小卡 asks for nothing beyond the download.

NFC小卡 ships an update every 2 months, 知我 every 8 days. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | NFC小卡 | 知我 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 8 days** |
| Size | 21 MB | 6 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [鑫烨 田](https://appshunter.io/developer/1784616783) | [宁伟 陈](https://appshunter.io/developer/1801975672) |

## What reviewers say

### NFC小卡

[App page](https://appshunter.io/ios/app/nfc/id6740208800)

**Features:** macOS Compatibility

**In-app purchases:** none


### 知我

[App page](https://appshunter.io/ios/app/id6780817925)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度会员 | $3.99 | per month |
| 年度会员 | $12.99 | per year |
| 单次报告 | $0.99 | one-time |


## Frequently asked questions

### Is NFC小卡 free?

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

### Is 知我 free?

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

### Do NFC小卡 or 知我 have ads?

Neither NFC小卡 nor 知我 shows ads.

### Which is updated more often, NFC小卡 or 知我?

NFC小卡 ships an update every 2 months, and 知我 every 8 days. Most recently, NFC小卡 was updated on October 30, 2026 and 知我 on November 5, 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.*