# The Sentry vs PdfTranslator

The clearest difference is in-app purchases: The Sentry at none against PdfTranslator's 2. The Sentry also leads on iOS requirement (17.0 vs 26.0). PdfTranslator's advantage is update cadence (fortnightly vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. PdfTranslator sells 2 in-app purchases, starting at $14.99 per month. The Sentry asks for nothing beyond the download.

The Sentry ships an update every 3 months, PdfTranslator fortnightly. The most recent releases landed on September 17, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | The Sentry | PdfTranslator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Size | 28 MB | 94 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [The Sentry Connect](https://appshunter.io/developer/1592291008) | [源 何](https://appshunter.io/developer/6777853495) |

## What reviewers say

### The Sentry

[App page](https://appshunter.io/ios/app/the-sentry/id1592291006)

**Features:** macOS Compatibility

**In-app purchases:** none


### PdfTranslator

[App page](https://appshunter.io/ios/app/pdftranslator-ai-and-annotate/id6777857088)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $14.99 | per month |
| Annual Subscription | $119.99 | per year |


## Frequently asked questions

### Is The Sentry free?

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

### Is PdfTranslator free?

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

### Do The Sentry or PdfTranslator have ads?

Neither The Sentry nor PdfTranslator shows ads.

### Which is updated more often, The Sentry or PdfTranslator?

The Sentry ships an update every 3 months, and PdfTranslator fortnightly. Most recently, The Sentry was updated on September 17, 2026 and PdfTranslator on September 20, 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.*