# NFC便签本 vs 21天计划

NFC便签本 and 21天计划 are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | NFC便签本 | 21天计划 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | — |
| Size | 3 MB | 42 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [小芳 王](https://appshunter.io/developer/1713873261) | [红升 孙](https://appshunter.io/developer/1502418960) |

## What reviewers say

### NFC便签本

[App page](https://appshunter.io/ios/app/nfc/id6470895447)

**Features:** macOS Compatibility

**In-app purchases:** none


### 21天计划

[App page](https://appshunter.io/ios/app/21/id6754164973)

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

**In-app purchases:** none


## Frequently asked questions

### Is NFC便签本 free?

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

### Is 21天计划 free?

21天计划 is free to download, with no in-app purchases.

### Do NFC便签本 or 21天计划 have ads?

Neither NFC便签本 nor 21天计划 shows ads.

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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.*