# TANGRAM IoT Tool vs OpenDisplay

The clearest difference is iOS requirement: TANGRAM IoT Tool at 12.0 against OpenDisplay's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

TANGRAM IoT Tool ships an update every 2 weeks, OpenDisplay every 8 days. The most recent releases landed on November 7, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | TANGRAM IoT Tool | OpenDisplay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (23 ratings)](https://appshunter.io/ios/app/opendisplay/id6780264891/reviews)** |
| Number of ratings | — | **23** |
| Positive reviews | — | 92.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 8 days** |
| Monetization | — | Free |
| Size | 75 MB | 1 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TANGRAM Company Limited.](https://appshunter.io/developer/1480182974) | [Philip Poloczek](https://appshunter.io/developer/1333036183) |

## What reviewers say

### TANGRAM IoT Tool

[App page](https://appshunter.io/ios/app/tangram-iot-tool/id1643057260)

**In-app purchases:** none


### 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 for multitasking, keeping important information visible. Connect via USB for minimal latency or Wi-Fi for easy setup.

**Highlights:** Real extended display functionality, USB and Wi-Fi connectivity, Retina-sharp rendering, Touch and scroll support, Portrait and landscape orientation, Private by design, no tracking

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

**In-app purchases:** none


## Frequently asked questions

### Is TANGRAM IoT Tool free?

TANGRAM IoT Tool is free to download, with no in-app purchases.

### Is OpenDisplay free?

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

### Do TANGRAM IoT Tool or OpenDisplay have ads?

Neither TANGRAM IoT Tool nor OpenDisplay shows ads.

### Which is updated more often, TANGRAM IoT Tool or OpenDisplay?

TANGRAM IoT Tool ships an update every 2 weeks, and OpenDisplay every 8 days. Most recently, TANGRAM IoT Tool was updated on November 7, 2026 and OpenDisplay on November 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*