# Mobile SOS vs PartSets

The clearest difference is in-app purchases: Mobile SOS at none against PartSets's 5. Mobile SOS also leads on iOS requirement (13.0 vs 17.0). PartSets's advantage is update cadence (every 5 months vs every 44 months). On price, ads and device support there is nothing between them.

Both are free to download. PartSets sells 5 one-off in-app purchases. Mobile SOS asks for nothing beyond the download.

Mobile SOS ships an update every 44 months, PartSets every 5 months. The most recent releases landed on September 27, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Mobile SOS | PartSets |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.0 (1 ratings)](https://appshunter.io/ios/app/partsets/id6612022770/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 44 months | **Every 5 months** |
| Monetization | — | Free with in-app purchases |
| Size | 36 MB | 9 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [SOS, Inc.](https://appshunter.io/developer/1658400757) | [宗林 郭](https://appshunter.io/developer/1752221005) |

## What reviewers say

### Mobile SOS

[App page](https://appshunter.io/ios/app/mobile-sos/id1658400755)

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

**In-app purchases:** none


### PartSets

[App page](https://appshunter.io/ios/app/partsets/id6612022770)

Easily manage your parts or items with this app. Add unlimited items, categorize them, track quantities, and even store associated PDF files. Enjoy secure data management with iCloud synchronization across multiple Apple devices.

**Highlights:** Unlimited parts management, Categorization and quantity tracking, iCloud synchronization, Multi-device operation, PDF resource saving, Secure data storage

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Advanced Features(Trial 1week) | Free | one-time |
| Advanced Features(A week) | $0.29 | one-time |
| Advanced Features(A Month) | $0.49 | one-time |
| Advanced Features(A year) | $4.99 | one-time |
| Advanced Feature(Forever) | $11.49 | one-time |


## Frequently asked questions

### Is Mobile SOS free?

Mobile SOS is free to download, with no in-app purchases.

### Is PartSets free?

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

### Do Mobile SOS or PartSets have ads?

Neither Mobile SOS nor PartSets shows ads.

### Which is updated more often, Mobile SOS or PartSets?

Mobile SOS ships an update every 44 months, and PartSets every 5 months. Most recently, Mobile SOS was updated on September 27, 2026 and PartSets on October 3, 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.*