# ComicPDFReader vs Winston Scientific Calculator

The clearest difference is price: ComicPDFReader at Free against Winston Scientific Calculator's $2.99. Winston Scientific Calculator's advantage is update cadence (every 5 days vs every 4 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

ComicPDFReader is free to download; Winston Scientific Calculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ComicPDFReader ships an update every 4 months, Winston Scientific Calculator every 5 days. The most recent releases landed on September 27, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | ComicPDFReader | Winston Scientific Calculator |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 days** |
| Size | 2 MB | 4 MB |
| Requires iOS | 17.5 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [HSIA-TING YEH](https://appshunter.io/developer/1855889149) | [Robert Corbin](https://appshunter.io/developer/1890247992) |

## What reviewers say

### ComicPDFReader

[App page](https://appshunter.io/ios/app/comicpdfreader/id6755726421)

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

**In-app purchases:** none


### Winston Scientific Calculator

[App page](https://appshunter.io/ios/app/winston-scientific-calculator/id6762801028)

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

**In-app purchases:** none


## Frequently asked questions

### Is ComicPDFReader free?

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

### Is Winston Scientific Calculator free?

Winston Scientific Calculator costs $2.99, with no in-app purchases.

### Do ComicPDFReader or Winston Scientific Calculator have ads?

Neither ComicPDFReader nor Winston Scientific Calculator shows ads.

### Which is updated more often, ComicPDFReader or Winston Scientific Calculator?

ComicPDFReader ships an update every 4 months, and Winston Scientific Calculator every 5 days. Most recently, ComicPDFReader was updated on September 27, 2026 and Winston Scientific Calculator 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.*