# SelfPortrait Canvas vs EMF Detector

The clearest difference is update cadence: EMF Detector at every 5 days against SelfPortrait Canvas's fortnightly. SelfPortrait Canvas's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

SelfPortrait Canvas ships an update fortnightly, EMF Detector every 5 days. The most recent releases landed on October 27, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | SelfPortrait Canvas | EMF Detector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.9 (9 ratings)](https://appshunter.io/ios/app/emf-detector-emf-meter/id6759903916/reviews)** |
| Number of ratings | — | **9** |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Fortnightly | **Every 5 days** |
| Monetization | — | Ad-supported |
| Size | 35 MB | 79 MB |
| Requires iOS | **15.8.3** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [Kyu-Hee Jang](https://appshunter.io/developer/1587578867) |

## What reviewers say

### SelfPortrait Canvas

[App page](https://appshunter.io/ios/app/selfportrait-canvas/id6738599691)

**Features:** macOS Compatibility

**In-app purchases:** none


### EMF Detector

[App page](https://appshunter.io/ios/app/emf-detector-emf-meter/id6759903916)

This app uses your phone's magnetometer to measure and display magnetic fields. It offers standard and paranormal measurement modes, helps locate sources of EMF, and allows you to record and export your readings.

**Highlights:** Live magnetic field gauge, Standard and paranormal modes, Source finding tool, Measurement session recording, CSV export, 24-hour exposure chart, Spirit Box entertainment mode

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

**In-app purchases:** none


## Frequently asked questions

### Is SelfPortrait Canvas free?

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

### Is EMF Detector free?

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

### Do SelfPortrait Canvas or EMF Detector have ads?

Both SelfPortrait Canvas and EMF Detector show ads.

### Which is updated more often, SelfPortrait Canvas or EMF Detector?

SelfPortrait Canvas ships an update fortnightly, and EMF Detector every 5 days. Most recently, SelfPortrait Canvas was updated on October 27, 2026 and EMF Detector on November 9, 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.*