# G1 Building vs 321 X

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.

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

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.

## The numbers

| Metric | G1 Building | 321 X |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Size | 325 MB | 324 MB |
| Requires iOS | **15.1** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Union Investment Real Estate GmbH](https://appshunter.io/developer/1814367913) | [Invesco Australia Limited](https://appshunter.io/developer/1577113922) |

## What reviewers say

### G1 Building

[App page](https://appshunter.io/ios/app/g1-building/id6745893757)

**Features:** Apple Wallet

**In-app purchases:** none


### 321 X

[App page](https://appshunter.io/ios/app/321-x/id6749880991)

**Features:** Apple Wallet, Vision Pro support

**In-app purchases:** none


## Frequently asked 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.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*