# SMD vs NFC Arcane

The clearest difference is update cadence: SMD at weekly against NFC Arcane's every 3 weeks. NFC Arcane's advantage is iOS requirement (18.5 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

SMD costs $19.99 and NFC Arcane $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SMD ships an update weekly, NFC Arcane every 3 weeks. The most recent releases landed on November 7, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | SMD | NFC Arcane |
| --- | --- | --- |
| Price | $19.99 | $19.99 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Monetization | Paid | — |
| Size | 1 MB | 9 MB |
| Requires iOS | 26.0 | **18.5** |
| Devices | **iPhone, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [YOSHINOBU HONGO](https://appshunter.io/developer/1678909753) | [Marc Super](https://appshunter.io/developer/1792449328) |

## What reviewers say

### SMD

[App page](https://appshunter.io/ios/app/smd-simple-magnetic-detector/id6446756301)

This tool for Apple Watch detects magnetic fields, offering detailed sensor views and customizable notifications. It provides polarity-specific haptic feedback and is recommended for Series 6 and later models for optimal performance.

**Highlights:** Magnetic field component monitoring (X, Y, Z), Customizable sensitivity, Notification interval settings, Significant change detection alerts, Polarity-specific haptic feedback, Analog Watch Mode for optimal performance

**Features:** Apple Watch app

**In-app purchases:** none


### NFC Arcane

[App page](https://appshunter.io/ios/app/nfc-arcane/id6747028298)

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

**In-app purchases:** none


## Frequently asked questions

### Is SMD free?

SMD costs $19.99, with no in-app purchases.

### Is NFC Arcane free?

NFC Arcane costs $19.99, with no in-app purchases.

### Do SMD or NFC Arcane have ads?

Neither SMD nor NFC Arcane shows ads.

### Which is updated more often, SMD or NFC Arcane?

SMD ships an update weekly, and NFC Arcane every 3 weeks. Most recently, SMD was updated on November 7, 2026 and NFC Arcane 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.*