# Poly Auction HK vs TDD

The clearest difference is update cadence: TDD at weekly against Poly Auction HK's every 2 months. TDD also leads on iOS requirement (12.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

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

Poly Auction HK ships an update every 2 months, TDD weekly. The most recent releases landed on November 3, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | Poly Auction HK | TDD |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Size | 60 MB | 33 MB |
| Requires iOS | 15.1 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Poly Auction Hong Kong Limited](https://appshunter.io/developer/1626959801) | [北京国联视讯信息技术股份有限公司](https://appshunter.io/developer/1219208569) |

## What reviewers say

### Poly Auction HK

[App page](https://appshunter.io/ios/app/poly-auction-hk/id1626959799)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### TDD

[App page](https://appshunter.io/ios/app/tdd-global/id6504396681)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Poly Auction HK free?

Poly Auction HK is free to download, with no in-app purchases.

### Is TDD free?

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

### Do Poly Auction HK or TDD have ads?

Neither Poly Auction HK nor TDD shows ads.

### Which is updated more often, Poly Auction HK or TDD?

Poly Auction HK ships an update every 2 months, and TDD weekly. Most recently, Poly Auction HK was updated on November 3, 2026 and TDD on November 12, 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.*