# IOT Central vs PDF Compressor

The clearest difference is in-app purchases: IOT Central at none against PDF Compressor's 3. IOT Central also leads on iOS requirement (10.0 vs 16.0). PDF Compressor's advantage is update cadence (every 3 weeks vs every 8 months). On price, ads and device support there is nothing between them.

Both are free to download. PDF Compressor sells 3 in-app purchases, starting at $0.99 per month. IOT Central asks for nothing beyond the download.

IOT Central ships an update every 8 months, PDF Compressor every 3 weeks. The most recent releases landed on October 12, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | IOT Central | PDF Compressor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 weeks** |
| Size | 44 MB | 7 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Requea](https://appshunter.io/developer/1391069543) | [荣晖 丁](https://appshunter.io/developer/1455797103) |

## What reviewers say

### IOT Central

[App page](https://appshunter.io/ios/app/iot-central/id1466198966)

**Features:** macOS Compatibility

**In-app purchases:** none


### PDF Compressor

[App page](https://appshunter.io/ios/app/pdf-compressor-shrink-files/id6767108146)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro | $0.99 | per month |
| Yearly Pro | $2.99 | per year |
| Lifetime Pro | $3.99 | one-time |


## Frequently asked questions

### Is IOT Central free?

IOT Central is free to download, with no in-app purchases.

### Is PDF Compressor free?

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

### Do IOT Central or PDF Compressor have ads?

Neither IOT Central nor PDF Compressor shows ads.

### Which is updated more often, IOT Central or PDF Compressor?

IOT Central ships an update every 8 months, and PDF Compressor every 3 weeks. Most recently, IOT Central was updated on October 12, 2026 and PDF Compressor on October 24, 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.*