# Tutu Watermark vs NFC CellMonitor

The clearest difference is in-app purchases: NFC CellMonitor at none against Tutu Watermark's 1. NFC CellMonitor also leads on update cadence (daily vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Tutu Watermark sells 1 one-off in-app purchase. NFC CellMonitor asks for nothing beyond the download.

Tutu Watermark ships an update every 3 weeks, NFC CellMonitor daily. The most recent releases landed on September 11, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Tutu Watermark | NFC CellMonitor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Daily** |
| Size | 30 MB | 19 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [单 安](https://appshunter.io/developer/1703734519) | [MTools Tec Co., Ltd](https://appshunter.io/developer/1531056218) |

## What reviewers say

### Tutu Watermark

[App page](https://appshunter.io/ios/app/tutu-watermark/id6711340833)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Permanent card | $3.99 | one-time |


### NFC CellMonitor

[App page](https://appshunter.io/ios/app/nfc-cellmonitor/id6759630875)

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

**In-app purchases:** none


## Frequently asked questions

### Is Tutu Watermark free?

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

### Is NFC CellMonitor free?

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

### Do Tutu Watermark or NFC CellMonitor have ads?

Neither Tutu Watermark nor NFC CellMonitor shows ads.

### Which is updated more often, Tutu Watermark or NFC CellMonitor?

Tutu Watermark ships an update every 3 weeks, and NFC CellMonitor daily. Most recently, Tutu Watermark was updated on September 11, 2026 and NFC CellMonitor on September 20, 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.*