TANGRAM IoT Tool vs OpenDisplay
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TANGRAM IoT Tool
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Binds TANGRAM to user device. Collect data through each respective sensors, record into TANGRAM. Use communication interface such as WiFi/BLE/NB-IoT/4G to send data back to TANGRAM IoT Cloud. Provide users with value by processing large amounts of data through the analysis platform complemented by its domain knowledge.
OpenDisplay
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.
- 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
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OpenDisplay turns your iPhone or iPad into a second display for your Mac. It's the open-source way to put your spare Apple device to work as a real extended monitor — drag windows onto it, keep chat, notes, or logs in view, and gain screen space anywhere you go. It's not a mirror: it's a genuine additional display your Mac treats like any other monitor. • Real extended display — arrange it in your Mac's Display settings and drag windows across • Connect over USB for the lowest latency, or over Wi-Fi with zero setup • Retina-sharp, pixel-for-pixel rendering • Touch and scroll — tap, drag, and two-finger scroll to control your Mac • Works in portrait or landscape • Private by design — a direct connection between your own devices, with no accounts, no servers, and no tracking IMPORTANT: OpenDisplay requires the companion OpenDisplay app for Mac, running on your computer on the same cable or Wi-Fi network. Get it at opendisplay.app — without it, this app has nothing to connect to. OpenDisplay is open source under the GPL-3.0 license. Read the code, report issues, or contribute at https://github.com/peetzweg/opendisplay
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | TANGRAM IoT Tool | OpenDisplay |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.7 (23 ratings) — better |
| Positive reviews | — | 92.3% of reviews |
| Number of ratings | — | 23 — better |
| Update frequency | Every 2 weeks | Every 8 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 75 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | TANGRAM Company Limited. | Philip Poloczek |
In-app purchases
TANGRAM IoT Tool
No in-app purchases
OpenDisplay
No in-app purchases
