# Poly Centre vs 321 X

Poly Centre 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.

Poly Centre ships an update every 2 weeks, 321 X every 3 weeks. The most recent releases landed on September 21, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Poly Centre | 321 X |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Size | 319 MB | 324 MB |
| Requires iOS | 15.5 | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [WYNYARD 048 SERVICE PTY LTD](https://appshunter.io/developer/1651484490) | [Invesco Australia Limited](https://appshunter.io/developer/1577113922) |

## What reviewers say

### Poly Centre

[App page](https://appshunter.io/ios/app/poly-centre/id6740210204)

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

**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 Poly Centre free?

Poly Centre 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 Poly Centre or 321 X have ads?

Neither Poly Centre nor 321 X shows ads.

### Which is updated more often, Poly Centre or 321 X?

Poly Centre ships an update every 2 weeks, and 321 X every 3 weeks. Most recently, Poly Centre was updated on September 21, 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.*