# Hand Held Metal Detector vs PDF Under

The clearest difference is update cadence: PDF Under at every 3 weeks against Hand Held Metal Detector's every 5 months. Hand Held Metal Detector's advantage is device support (3 vs 1) and iOS requirement (11.0 vs 17.6). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Hand Held Metal Detector sells 1 one-off in-app purchase and PDF Under sells 3 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Hand Held Metal Detector ships an update every 5 months, PDF Under every 3 weeks. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Hand Held Metal Detector | PDF Under |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (52 ratings)](https://appshunter.io/ios/app/hand-held-metal-detector/id712588353/reviews)** | — |
| Number of ratings | **52** | — |
| Positive reviews | 67.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 25 MB | 3 MB |
| Requires iOS | **11.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Tigran Mkhitaryan](https://appshunter.io/developer/602761285) | [Emre KABOGLU](https://appshunter.io/developer/1892627286) |

## What reviewers say

### Hand Held Metal Detector

[App page](https://appshunter.io/ios/app/hand-held-metal-detector/id712588353)

This app transforms your iPhone or iPad into a functional metal detector. It utilizes the device's magnetometer to identify ferromagnetic metals like steel, iron, gold, and silver. Easily scan bags or pockets for hidden metal objects with vibration mode for discretion.

**Highlights:** Magnetometer-based metal detection, Identifies ferromagnetic metals, Vibration mode for discreet scanning, Works with iPhone and iPad, Calibration via shaking

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $3.99 | one-time |


### PDF Under

[App page](https://appshunter.io/ios/app/pdf-under-pdf-compressor/id6804278677)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF Under Weekly | $1.99 | per 7 days |
| PDF Under Yearly | $13.99 | per year |
| PDF Under Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is Hand Held Metal Detector free?

Hand Held Metal Detector is free to download, with in-app purchases available.

### Is PDF Under free?

PDF Under is free to download, with in-app purchases available.

### Do Hand Held Metal Detector or PDF Under have ads?

Neither Hand Held Metal Detector nor PDF Under shows ads.

### Which is updated more often, Hand Held Metal Detector or PDF Under?

Hand Held Metal Detector ships an update every 5 months, and PDF Under every 3 weeks. Most recently, Hand Held Metal Detector was updated on October 23, 2026 and PDF Under on October 25, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*