# PDF Projector vs StayGray

The clearest difference is price: StayGray at Free against PDF Projector's $0.99. StayGray also leads on update cadence (fortnightly vs every 2 months). PDF Projector's advantage is rating (4.7 vs 3.7) and in-app purchases (none vs 3). On ratings volume and ads there is nothing between them.

StayGray is free to download; PDF Projector costs $0.99 up front. StayGray sells 3 in-app purchases, starting at $1.99 per month. PDF Projector asks for nothing beyond the download.

PDF Projector holds the better App Store score, 4.7 against 3.7. Both are backed by a comparable volume of ratings — 3 and 3 respectively. Written reviews point the same way: 83% of PDF Projector's written reviews are positive against 67% of StayGray's.

PDF Projector ships an update every 2 months, StayGray fortnightly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | PDF Projector | StayGray |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/pdf-projector/id1444555016/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/staygray/id6757358852/reviews) |
| Number of ratings | 3 | 3 |
| Positive reviews | **83.3% of reviews** | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 2 MB | 21 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Benjamin Burton](https://appshunter.io/developer/687735578) | [MATTHIAS NEUWIRTH](https://appshunter.io/developer/1819953456) |

## What reviewers say

### PDF Projector

[App page](https://appshunter.io/ios/app/pdf-projector/id1444555016)

Turn your device into a presentation projector. Display PDF slideshows full-screen on external monitors and control navigation from your iPhone or iPad. An Apple Watch can even act as a remote.

**Highlights:** Projects PDFs to external screens, Use iPhone/iPad for navigation, Apple Watch remote control, Thumbnail and page preview, Supports iCloud documents, Share PDFs from other apps

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

**In-app purchases:** none


### StayGray

[App page](https://appshunter.io/ios/app/staygray/id6757358852)

This app helps reduce screen time by automatically switching your device to grayscale. You can customize when color is allowed, set schedules, and track your progress in reducing usage.

**Highlights:** Automatic grayscale switching, Customizable color exceptions, Scheduled monochrome periods, Location-based color activation, Progress tracking for screen time, Color breaks for temporary color access

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $1.99 | per month |
| StayGray Plus | $8.99 | per year |
| StayGray Plus: Lifetime | $24.99 | one-time |


## Frequently asked questions

### Is PDF Projector free?

PDF Projector costs $0.99, with no in-app purchases.

### Is StayGray free?

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

### Which has better reviews, PDF Projector or StayGray?

PDF Projector is rated higher. PDF Projector averages 4.7 out of 5 from 3 ratings, while StayGray averages 3.7 from 3 ratings.

### Do PDF Projector or StayGray have ads?

Neither PDF Projector nor StayGray shows ads.

### Which is updated more often, PDF Projector or StayGray?

PDF Projector ships an update every 2 months, and StayGray fortnightly. Most recently, PDF Projector was updated on October 25, 2026 and StayGray on October 24, 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.*