# Complex Calc vs PDF Watch Viewer

The clearest difference is in-app purchases: Complex Calc at none against PDF Watch Viewer's 9. Complex Calc also leads on rating (5.0 vs 4.6) and iOS requirement (12.0 vs 17.0). PDF Watch Viewer's advantage is update cadence (every 11 days vs every 6 months) and ratings volume (378 vs 2). On price, ads and device support there is nothing between them.

Both are free to download. PDF Watch Viewer sells 9 in-app purchases, starting at $4.99 per 7 days. Complex Calc asks for nothing beyond the download.

Complex Calc holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: PDF Watch Viewer has 378 ratings behind it against 2, so its average is the more settled of the two.

Complex Calc ships an update every 6 months, PDF Watch Viewer every 11 days. The most recent releases landed on October 2, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Complex Calc | PDF Watch Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/complex-calc/id1547989979/reviews)** | [4.6 (378 ratings)](https://appshunter.io/ios/app/pdf-watch-viewer-wristdocs/id6745387064/reviews) |
| Number of ratings | 2 | **378** |
| Positive reviews | — | 33.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 11 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 12 MB | 74 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Yevhen Pyvovarov](https://appshunter.io/developer/1547989981) | [ONNEX YAZILIM ANONIM SIRKETI](https://appshunter.io/developer/1856674142) |

## What reviewers say

### Complex Calc

[App page](https://appshunter.io/ios/app/complex-calc/id1547989979)

Perform advanced calculations with complex numbers, including conversions between rectangular and exponential forms. Features quick copy-paste functionality and automatic dark mode for a seamless user experience.

**Highlights:** Rectangular to exponential form conversion, Exponential to rectangular form conversion, Four basic operations with complex numbers, Quick copy-paste results, Auto dark mode

**Features:** macOS Compatibility

**In-app purchases:** none


### PDF Watch Viewer

[App page](https://appshunter.io/ios/app/pdf-watch-viewer-wristdocs/id6745387064)

View PDF, Word, Excel, and text files directly on your Apple Watch. Easily navigate, zoom, and organize documents for quick access on the go. Syncs seamlessly with your iPhone for offline viewing.

**Highlights:** PDF, Word, Excel, Text file support, Zoom and page navigation, Favorites and collections, Seamless iPhone sync, Offline access, Image and notes support

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $4.99 | per 7 days |
| Weekly Subscription | $6.99 | per 7 days |
| WristDocs Six Months Premium | $9.99 | per 6 months |
| Monthly Subscription | $9.99 | per month |
| 6-Month Premium | $14.99 | per 6 months |
| Annual Subscription | $19.99 | per year |
| Annual Subscription | $29.99 | per year |
| Lifetime Access | $29.99 | one-time |
| Lifetime Premium Access | $59.99 | one-time |


## Frequently asked questions

### Is Complex Calc free?

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

### Is PDF Watch Viewer free?

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

### Which has better reviews, Complex Calc or PDF Watch Viewer?

Complex Calc is rated higher. Complex Calc averages 5.0 out of 5 from 2 ratings, while PDF Watch Viewer averages 4.6 from 378 ratings.

### Do Complex Calc or PDF Watch Viewer have ads?

Neither Complex Calc nor PDF Watch Viewer shows ads.

### Which is updated more often, Complex Calc or PDF Watch Viewer?

Complex Calc ships an update every 6 months, and PDF Watch Viewer every 11 days. Most recently, Complex Calc was updated on October 2, 2026 and PDF Watch Viewer on October 16, 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.*