# SSIU vs IPDC Library

The clearest difference is update cadence: SSIU at every 4 months against IPDC Library's every 18 months. On price, ads, in-app purchases and device support there is nothing between them.

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

SSIU ships an update every 4 months, IPDC Library every 18 months. The most recent releases landed on September 23, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | SSIU | IPDC Library |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 18 months |
| Size | 214 MB | 40 MB |
| Requires iOS | **12.2** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Shaikh Muzammil](https://appshunter.io/developer/1562122810) | [Diwaliba Charitable Trust](https://appshunter.io/developer/1708355560) |

## What reviewers say

### SSIU

[App page](https://appshunter.io/ios/app/ssiu/id6477534147)

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

**In-app purchases:** none


### IPDC Library

[App page](https://appshunter.io/ios/app/ipdc-library/id6526469981)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SSIU free?

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

### Is IPDC Library free?

IPDC Library is free to download, with no in-app purchases.

### Do SSIU or IPDC Library have ads?

Neither SSIU nor IPDC Library shows ads.

### Which is updated more often, SSIU or IPDC Library?

SSIU ships an update every 4 months, and IPDC Library every 18 months. Most recently, SSIU was updated on September 23, 2026 and IPDC Library on September 19, 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.*