# OpenDisplay vs K37 Simple Projects

The clearest difference is in-app purchases: OpenDisplay at none against K37 Simple Projects's 1. OpenDisplay also leads on iOS requirement (15.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. K37 Simple Projects sells 1 one-off in-app purchase. OpenDisplay asks for nothing beyond the download.

OpenDisplay ships an update every 8 days, K37 Simple Projects every 6 days. The most recent releases landed on October 14, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | OpenDisplay | K37 Simple Projects |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (14 ratings)](https://appshunter.io/ios/app/opendisplay/id6780264891/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 6 days** |
| Monetization | Free | — |
| Size | 1 MB | 6 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Philip Poloczek](https://appshunter.io/developer/1333036183) | [K37 Software LLC](https://appshunter.io/developer/1886297629) |

## What reviewers say

### OpenDisplay

[App page](https://appshunter.io/ios/app/opendisplay/id6780264891)

Transform your iPhone or iPad into a genuine second display for your Mac. This open-source solution allows you to extend your screen space, keeping essential apps visible. Connect via USB for minimal latency or Wi-Fi for easy setup.

**Highlights:** Use iPhone/iPad as a second Mac display, Connect via USB or Wi-Fi, Retina-sharp rendering, Touch and scroll support, Portrait or landscape orientation, Private by design, no tracking

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

**In-app purchases:** none


### K37 Simple Projects

[App page](https://appshunter.io/ios/app/k37-simple-projects/id6795298936)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Simple Projects Full | $2.99 | one-time |


## Frequently asked questions

### Is OpenDisplay free?

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

### Is K37 Simple Projects free?

K37 Simple Projects is free to download, with in-app purchases available.

### Do OpenDisplay or K37 Simple Projects have ads?

Neither OpenDisplay nor K37 Simple Projects shows ads.

### Which is updated more often, OpenDisplay or K37 Simple Projects?

OpenDisplay ships an update every 8 days, and K37 Simple Projects every 6 days. Most recently, OpenDisplay was updated on October 14, 2026 and K37 Simple Projects on September 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.*