# Phone Guardian vs Material Quantity Calculator

The clearest difference is price: Material Quantity Calculator at Free against Phone Guardian's $1.99. Phone Guardian's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

Material Quantity Calculator is free to download; Phone Guardian costs $1.99 up front. Material Quantity Calculator sells 1 one-off in-app purchase. Phone Guardian asks for nothing beyond the download.

## The numbers

| Metric | Phone Guardian | Material Quantity Calculator |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Positive reviews | 70.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | — |
| Monetization | Paid | — |
| Size | 2 MB | 2 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [KAZUTO MATSUBARA](https://appshunter.io/developer/6789723498) | [Takafumi Satori](https://appshunter.io/developer/6787873997) |

## What reviewers say

### Phone Guardian

[App page](https://appshunter.io/ios/app/phone-guardian-left-behind/id6789723496)

This app alerts your Apple Watch the moment your iPhone disconnects via Bluetooth, preventing you from leaving it behind. It offers customizable alerts, safe zones, and the ability to ring your iPhone from your watch.

**Highlights:** Instant left-behind alerts, Distance warning, False-alarm guard, Safe Zones, Ring iPhone from Watch, Watch face functionality, Battery friendly design

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Material Quantity Calculator

[App page](https://appshunter.io/ios/app/material-quantity-calculator/id6795407270)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Material Quantity Pro | $3.99 | one-time |


## Frequently asked questions

### Is Phone Guardian free?

Phone Guardian costs $1.99, with no in-app purchases.

### Is Material Quantity Calculator free?

Material Quantity Calculator is free to download, with in-app purchases available.

### Do Phone Guardian or Material Quantity Calculator have ads?

Neither Phone Guardian nor Material Quantity Calculator shows ads.

---

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