# Smartap vs 21

The clearest difference is iOS requirement: Smartap at 15.1 against 21's 18.4. On price, ads, in-app purchases and device support there is nothing between them.

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

## The numbers

| Metric | Smartap | 21 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/smartap-nfc-tools/id6461724542/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 34 months | — |
| Monetization | Free | — |
| Size | 17 MB | 11 MB |
| Requires iOS | **15.1** | 18.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Safeair Media Inc.](https://appshunter.io/developer/1779816071) | [Najib El guertit](https://appshunter.io/developer/1816291075) |

## What reviewers say

### Smartap

[App page](https://appshunter.io/ios/app/smartap-nfc-tools/id6461724542)

Easily read and write information to NFC tags. This utility allows for quick data transfer and interaction with NFC-enabled devices.

**Highlights:** Read NFC tags, Write NFC tags, NFC data interaction, NFC tag management

**In-app purchases:** none


### 21

[App page](https://appshunter.io/ios/app/21-card/id6746346266)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Smartap free?

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

### Is 21 free?

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

### Do Smartap or 21 have ads?

Neither Smartap nor 21 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.*