# PDF Viewer vs Sparks HCM

The clearest difference is in-app purchases: Sparks HCM at none against PDF Viewer's 3. Sparks HCM also leads on update cadence (every 3 months vs every 21 months). PDF Viewer's advantage is iOS requirement (13.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. PDF Viewer sells 3 in-app purchases, starting at $0.99 per 7 days. Sparks HCM asks for nothing beyond the download.

PDF Viewer ships an update every 21 months, Sparks HCM every 3 months. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | PDF Viewer | Sparks HCM |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 3 months** |
| Size | 20 MB | 35 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Dineshbhai Rupareliya](https://appshunter.io/developer/1726586445) | [Sparks HCM](https://appshunter.io/developer/1857212973) |

## What reviewers say

### PDF Viewer

[App page](https://appshunter.io/ios/app/pdf-viewer-all-pdf-reader/id6478919646)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads for 1 Week | $0.99 | per 7 days |
| Remove ads for 1 Month | $1.99 | per month |
| Remove ads for 1 Year | $5.99 | per year |


### Sparks HCM

[App page](https://appshunter.io/ios/app/sparks-hcm/id6755908211)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PDF Viewer free?

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

### Is Sparks HCM free?

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

### Do PDF Viewer or Sparks HCM have ads?

Neither PDF Viewer nor Sparks HCM shows ads.

### Which is updated more often, PDF Viewer or Sparks HCM?

PDF Viewer ships an update every 21 months, and Sparks HCM every 3 months. Most recently, PDF Viewer was updated on October 25, 2026 and Sparks HCM on October 30, 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.*