# Seritag NFC Encoder vs Sip

The clearest difference is in-app purchases: Sip at none against Seritag NFC Encoder's 3. Seritag NFC Encoder's advantage is update cadence (every 11 days vs monthly) and iOS requirement (15.1 vs 18.6). On price, ads and device support there is nothing between them.

Both are free to download. Seritag NFC Encoder sells 3 one-off in-app purchases. Sip asks for nothing beyond the download.

Seritag NFC Encoder ships an update every 11 days, Sip monthly. The most recent releases landed on October 21, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Seritag NFC Encoder | Sip |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 11 days** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 34 MB | 25 MB |
| Requires iOS | **15.1** | 18.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [TabDesk Ltd](https://appshunter.io/developer/1709292571) | [Sipwise](https://appshunter.io/developer/871192252) |

## What reviewers say

### Seritag NFC Encoder

[App page](https://appshunter.io/ios/app/seritag-nfc-encoder/id6739066343)

This utility app allows users to read, write, and lock various NFC tags. It can scan tags to retrieve encoded data like URLs or text, identify unique chip IDs, and determine if a chip is locked or writable.

**Highlights:** Read NFC tag data (URL, text), Get NFC chip Unique ID, Check if NFC chip is locked, Check if NFC chip is writable, Write data to NFC tags, Lock NFC tags

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Password Features: 5 Tags | $1.99 | one-time |
| Password Features: 25 Tags | $4.99 | one-time |
| Password Features: 100 Tags | $14.99 | one-time |


### Sip

[App page](https://appshunter.io/ios/app/sipphone-connect/id6770508561)

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

**In-app purchases:** none


## Frequently asked questions

### Is Seritag NFC Encoder free?

Seritag NFC Encoder is free to download, with in-app purchases available.

### Is Sip free?

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

### Do Seritag NFC Encoder or Sip have ads?

Neither Seritag NFC Encoder nor Sip shows ads.

### Which is updated more often, Seritag NFC Encoder or Sip?

Seritag NFC Encoder ships an update every 11 days, and Sip monthly. Most recently, Seritag NFC Encoder was updated on October 21, 2026 and Sip on October 28, 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.*