Comparison

G1 Building vs 321 X

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

Head to head

Building App

321 Exhibition St

About

G1 Building

Features

Read full description

The G1 building app coordinates numerous building functions with an interactive interface to gain access to the building, book amenity, find out information on local retailers with offers and provide a source of information on building functionality.

About

321 X

Features

Read full description

Welcome to 321X - Unlock a range of services, amenities and offers to make your work-life easy & without friction. This one-stop-shop app delivers access to our exclusive suite of services and amenities. Stay in touch with the latest news and events happening in our building, book in for wellness classes, access exclusive offers, and connect with Concierge.

Screenshots

G1 Building4 screens

321 X4 screens

Verdict

The call

G1 Building and 321 X are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

G1 Building ships an update fortnightly, 321 X every 3 weeks. The most recent releases landed on September 9, 2026 and September 14, 2026 respectively.

ScorecardNo meaningful differences

G1 Building versus 321 X: the parameters behind the verdict, then further details
Parameter	G1 Building	321 X
Price	Free	Free
Update frequency	Fortnightly — better	Every 3 weeks
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	15.1 — better	15.5
Further details — not scored
Size	325 MB	324 MB
Age rating	4+	4+
Developer	Union Investment Real Estate GmbH	Invesco Australia Limited

In-app purchases

None

G1 Building

No in-app purchases

None

321 X

No in-app purchases

Questions

Is G1 Building free?

G1 Building is free to download, with no in-app purchases.

Is 321 X free?

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

Do G1 Building or 321 X have ads?

Neither G1 Building nor 321 X shows ads.

Which is updated more often, G1 Building or 321 X?

G1 Building ships an update fortnightly, and 321 X every 3 weeks. Most recently, G1 Building was updated on September 9, 2026 and 321 X on September 14, 2026.