CARD ACCESS vs OpenDisplay
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CARD ACCESS
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Committed to the development and implementation of access control systems, attendance tracking systems, consumption management systems, patrol management systems, kindergarten transfer systems, access gates and parking management solutions in the field of card technology
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, keeping essential apps visible. Connect via USB for minimal latency or Wi-Fi for easy setup.
- 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
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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 https://peetzweg.github.io/opendisplay — 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 ads: OpenDisplay at none against CARD ACCESS's shown. CARD ACCESS's advantage is iOS requirement (9.0 vs 15.0). On price, update cadence, in-app purchases and device support 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.
CARD ACCESS ships an update fortnightly, OpenDisplay every 8 days. The most recent releases landed on May 16, 2026 and September 23, 2026 respectively.
| Parameter | CARD ACCESS | OpenDisplay |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.9 (8 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 8 — better |
| Update frequency | Fortnightly | Every 8 days — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 17 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | 润泽 吴 | Philip Poloczek |
In-app purchases
CARD ACCESS
No in-app purchases
OpenDisplay
No in-app purchases









