Comparison

CARD ACCESS vs OpenDisplay

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

CARD ACCESS

Features
Read full description

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

About

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.

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
Read full description

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

CARD ACCESS4 screens
OpenDisplay1 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

CARD ACCESS ships an update fortnightly, OpenDisplay every 8 days. The most recent releases landed on May 16, 2026 and September 23, 2026 respectively.

Scorecard2 real differences · 8 level
CARD ACCESS versus OpenDisplay: the parameters behind the verdict, then further details
ParameterCARD ACCESSOpenDisplay
PriceFreeFree
Rating—4.9 (8 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—8 — better
Update frequencyFortnightlyEvery 8 days — better
AdsYesNo — better
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better15.0
Further details — not scored
Size17 MB1 MB
Age rating4+4+
Developer润泽 吴Philip Poloczek

In-app purchases

None

CARD ACCESS

No in-app purchases

None

OpenDisplay

No in-app purchases

Questions

Is CARD ACCESS free?
CARD ACCESS is free to download, with no in-app purchases.
Is OpenDisplay free?
OpenDisplay is free to download, with no in-app purchases.
Do CARD ACCESS or OpenDisplay have ads?
CARD ACCESS shows ads; OpenDisplay does not.
Which is updated more often, CARD ACCESS or OpenDisplay?
CARD ACCESS ships an update fortnightly, and OpenDisplay every 8 days. Most recently, CARD ACCESS was updated on May 16, 2026 and OpenDisplay on September 23, 2026.

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