Comparison

Q vs D

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

Head to head
About

Q

Control Q-SYS systems remotely from your iOS device. Design custom user interfaces in Q-SYS Designer software to manage various system elements like audio, video, and lighting. Offers extensive control capabilities for a seamless user experience.

Highlights
  • Remote system control
  • Customizable user interfaces (UCIs)
  • Source selection
  • PTZ camera control with video preview
  • Lighting dimmer control
  • Volume faders
  • Signal meters
Features
Read full description

Control Q-SYS systems from your iOS device! Within Q-SYS Designer software, user control interfaces (UCIs) can be created, and nearly any element in the system can be placed in the UCIs for control and monitoring. This enables a near limitless array of control capability, all from your iOS device, including source selection buttons, Q-SYS PTZ camera controls (with video preview frames), lighting dimmer controls, projector on/off selector, signal meters, screen up/down, snapshot recall, volume control faders, and more. This app is designed for use with QSC's Q-SYS Platform only. Q-SYS UCI deployment onto a Core processor for use with TSC touch screens, UCI viewer for PC and iOS app requires license activation. Visit www.qsc.com/uci for more details.

About

D

Features
Read full description

Mobile Install is a powerful field service management app designed for technicians, installers, and service teams who use D-Tools SI (System Integrator). Mobile Install will allow field users to manage their tasks and service orders, track time, add site items and update status, Mobile Install can also capture time entries when offline with no internet connection. KEY FEATURES • Dashboard — Get a clear overview of your daily work, priorities, and pending items at a glance • Service Orders — View and update service orders. Add site items, site notes, site images and update status. • Tasks — View and update tasks. Add site items, site notes, site images and update status. • Calendar View — Plan your day with an integrated calendar showing all your scheduled tasks and service orders • Site Notes and Site Images — Capture site images on site and add notes to tasks and service orders • Installer Tools — Quick access to assignments, routes, and work priorities for installation teams • Barcode Scanning — Use your device camera to scan barcodes for quick equipment and part lookups • Offline Mode — View tasks and service orders when offline and create time entries when offline which will instantly sync back when online. • Push Notifications — Stay informed about new assignments, schedule changes, and updates instantly • Secure Access — Enterprise-grade authentication protects your data and customer information BUILT FOR THE FIELD Mobile Install is designed specifically for teams that work on the move. No more paperwork, no more missed updates, and no more lost time syncing between the office and the field. Perfect for: - Installation technicians - Field service engineers - Service order coordinators - Maintenance and repair teams - On-site contractors and installers WHY CHOOSE MOBILE INSTALL? - Fast, intuitive interface built for on-the-go use - Complete documentation at your fingertips - Real-time sync between team members and the back office - Designed with field technicians, for field technicians - Reliable offline-first design — never lose work due to connectivity Get more work done, reduce errors, and keep your team in sync — wherever the job takes you. For support, questions, or feedback, please get in touch with our team using the support link provided.

Screenshots

Q2 screens
D4 screens

Verdict

The call

The clearest difference is update cadence: D at fortnightly against Q's every 3 months. Q's advantage is iOS requirement (12.0 vs 15.6). On price, ads, 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

Q ships an update every 3 months, D fortnightly. The most recent releases landed on October 10, 2026 and October 2, 2026 respectively.

Scorecard2 real differences · 8 level
Q versus D: the parameters behind the verdict, then further details
ParameterQD
PriceFreeFree
Rating3.0 (53 ratings) — better—
Positive reviews18.9% of reviews—
Number of ratings53 — better—
Update frequencyEvery 3 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.6
Further details — not scored
Size18 MB32 MB
Age rating4+4+
DeveloperQSC Audio Products, LLC.D-Tools

In-app purchases

None

Q

No in-app purchases

None

D

No in-app purchases

Questions

Is Q free?
Q is free to download, with no in-app purchases.
Is D free?
D is free to download, with no in-app purchases.
Do Q or D have ads?
Neither Q nor D shows ads.
Which is updated more often, Q or D?
Q ships an update every 3 months, and D fortnightly. Most recently, Q was updated on October 10, 2026 and D on October 2, 2026.

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